I am trying to show my webview only after I inject the CSS file to the HTML.
I have tried to put it on onPageCommitVisible function, but it works only 23 apis andd above. Someone knows how can I show the webview only after the CSS has fininshed to load? Now it "jumps" and I see the original CSS for the first one second, before the new one is replaced.
#Override
public void onPageFinished(WebView view, String url) {
Utils.logDebug(this, "Page finished");
if (android.os.Build.VERSION.SDK_INT < 23) {
injectCSS(view);
}
super.onPageFinished(view, url);
showWebView(true);
onPageChange();
}
This is my InjestCSS function:
private void injectCSS(WebView webView) {
try {
webView.loadUrl("javascript:(function() {" +
"var css = document.createElement(\"style\");\n" +
"css.type = \"text/css\";\n" +
"css.innerHTML = \"" + readFileAsString() + "\";\n" +
"document.body.appendChild(css);" +
"})()");
} catch (Exception e) {
e.printStackTrace();
}
}
This function inject the CSS code to the HTML, as you can see in the function.
There are few places where you can handle this.
You could use evaluateJavaScript instead of loadUrl (API level 19) and pass callback in which you will set webview visible.
You could register your own javascript interface using addJavaScriptInterface and call it on the end of your script
You could set WebChromeClient and override onJsAlert then in your script raise alert with specific message.
UPDATE: Additionally this could be achieved by intercepting one of 'css' request, and append loaded file with needed content. This will allow you to inject your styles right before onPageFinished. Check this this thread.
All approaches I have combined in following example:
package com.j2ko.webviewapp;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Base64;
import android.util.Log;
import android.view.View;
import android.webkit.JavascriptInterface;
import android.webkit.JsResult;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import java.io.InputStream;
import java.io.StringReader;
import java.io.StringWriter;
public class MainActivity extends AppCompatActivity {
private static final String MAIN_FUNC_FMT = "(function() { %s })()";
private static final String FUNC_BODY_FMT =
"var parent = document.loadedgetElementsByTagName('head').item(0);" +
"var css = document.createElement('style');" +
"css.type = 'text/css';" +
"css.innerHTML = %s;" +
"parent.appendChild(css);";
private static final String BASE64_DECODE_FMT = "window.atob('%s')";
WebView mWebView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mWebView = (WebView) findViewById(R.id.webview);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.setWebViewClient(new WebViewClient() {
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
//Change it to whatever
injectWithEvaluateAndInterface(view);
}
#Override
public void onLoadResource(WebView view, String url) {
super.onLoadResource(view, url);
}
});
mWebView.setVisibility(View.INVISIBLE);
mWebView.loadUrl("http://wiki.org");
}
private static class CSSInjectBuilder {
private final String mOrigin;
private String mAtEnd = null;
private boolean mUseBase64 = false;
public CSSInjectBuilder(String css) {
mOrigin = css;
}
public CSSInjectBuilder withBase64() {
mUseBase64 = true;
return this;
}
public CSSInjectBuilder withExpressionAtEnd(String expression){
mAtEnd = expression;
return this;
}
String build() {
String func_body = FUNC_BODY_FMT;
if (mAtEnd != null) {
func_body += mAtEnd;
}
final String css;
if (mUseBase64) {
byte[] buffer = mOrigin.getBytes();
css = String.format(BASE64_DECODE_FMT, Base64.encodeToString(buffer, Base64.NO_WRAP));
} else {
css = "'" + mOrigin + "'";
}
func_body = String.format(func_body, css);
return String.format(MAIN_FUNC_FMT, func_body);
}
}
byte[] loadAsset() {
try {
InputStream inputStream = getAssets().open("style.css");
byte[] buffer = new byte[inputStream.available()];
inputStream.read(buffer);
inputStream.close();
return buffer;
} catch (Exception e) {
}
return null;
}
String loadCSS() {
return new String(loadAsset());
}
void injectWithEvaluate(final WebView view) {
view.evaluateJavascript(new CSSInjectBuilder(loadCSS()).withBase64().build(), new ValueCallback<String>() {
#Override
public void onReceiveValue(String value) {
view.setVisibility(View.VISIBLE);
}
});
}
void injectWithEvaluateAndInterface(WebView view) {
view.addJavascriptInterface(new WebViewInterface(), "WebViewBackEnd");
final String injector = new CSSInjectBuilder(loadCSS())
.withBase64()
.withExpressionAtEnd("window.WebViewBackEnd.CSSInjectionComplete();")
.build();
view.evaluateJavascript(injector, null);
}
void injectWithLoadUrlSimple(WebView view) {
view.loadUrl("javascript:" + loadCSS());
view.setVisibility(View.VISIBLE);
}
void injectWithLoadUrlAndCheckAlert(final WebView view) {
view.setWebChromeClient(new WebChromeClient() {
#Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
if (message.equals("CSSInjectionComplete")) {
view.setVisibility(View.VISIBLE);
return true;
}
return super.onJsAlert(view, url, message, result);
}
});
//alert could hang aplying scripts so put it on timeout
final String injector = new CSSInjectBuilder(loadCSS())
.withBase64()
.withExpressionAtEnd("setTimeout(function(){alert('CSSInjectionComplete');}, 1);")
.build();
view.loadUrl("javascript:" + injector);
}
private class WebViewInterface {
#JavascriptInterface
public void CSSInjectionComplete(){
mWebView.post(new Runnable() {
#Override
public void run() {
mWebView.setVisibility(View.VISIBLE);
}
});
}
}
}
Related
So another one from the same code with another problem.
here is the code
package com.test.aplikasirevisi;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import android.app.Activity;
import android.app.ProgressDialog;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toast;
import static com.test.aplikasirevisi.Information.Highest;
import static com.test.aplikasirevisi.Information.Lowest;
import static com.test.aplikasirevisi.Information.mypreference;
public class MonitoringScreen extends Activity {
private static final String TAG = "BlueTest5-MainActivity";
private int mMaxChars = 50000;//Default
private UUID mDeviceUUID;
private BluetoothSocket mBTSocket;
private ReadInput mReadThread = null;
TextView highest;
TextView lowest;
private boolean mIsUserInitiatedDisconnect = false;
private TextView mTxtReceive;
private Button mBtnClearInput;
private Button mBtnGetBPM;
private ScrollView scrollView;
private CheckBox chkScroll;
private CheckBox chkReceiveText;
private boolean mIsBluetoothConnected = false;
private BluetoothDevice mDevice;
private ProgressDialog progressDialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_monitoring_screen);
ActivityHelper.initialize(this);
Intent intent = getIntent();
Bundle b = intent.getExtras();
mDevice = b.getParcelable(MainActivity.DEVICE_EXTRA);
mDeviceUUID = UUID.fromString(b.getString(MainActivity.DEVICE_UUID));
mMaxChars = b.getInt(MainActivity.BUFFER_SIZE);
Log.d(TAG, "Ready");
mTxtReceive = (TextView) findViewById(R.id.txtReceive);
chkScroll = (CheckBox) findViewById(R.id.chkScroll);
chkReceiveText = (CheckBox) findViewById(R.id.chkReceiveText);
scrollView = (ScrollView) findViewById(R.id.viewScroll);
mBtnClearInput = (Button) findViewById(R.id.btnClearInput);
mBtnGetBPM = (Button) findViewById(R.id.mBtnGetBPM);
mTxtReceive.setMovementMethod(new ScrollingMovementMethod());
highest = (TextView) findViewById(R.id.etHighest);
lowest = (TextView) findViewById(R.id.etLowest);
SharedPreferences sharedpreferences = getSharedPreferences(mypreference,
Context.MODE_PRIVATE);
if (sharedpreferences.contains(Highest)) {
highest.setText(sharedpreferences.getString(Highest, ""));
}
if (sharedpreferences.contains(Lowest)) {
lowest.setText(sharedpreferences.getString(Lowest, ""));
}
mBtnClearInput.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
mTxtReceive.setText("");
}
});
}
private class ReadInput implements Runnable{
private boolean bStop = false;
private Thread t;
public ReadInput() {
t = new Thread(this, "Input Thread");
t.start();
}
public boolean isRunning() {
return t.isAlive();
}
#Override
public void run() {
InputStream inputStream;
try {
inputStream = mBTSocket.getInputStream();
while (!bStop) {
byte[] buffer = new byte[256];
if (inputStream.available() > 0) {
inputStream.read(buffer);
int i;
/*
* This is needed because new String(buffer) is taking the entire buffer i.e. 256 chars on Android 2.3.4 http://stackoverflow.com/a/8843462/1287554
*/
for (i = 0; i < buffer.length && buffer[i] != 0; i++) {
}
final String strInput = new String(buffer, 0, i);
String getHi = null;
SharedPreferences sharedpreferences = getSharedPreferences(mypreference,
Context.MODE_PRIVATE);
if (sharedpreferences.contains(Highest)) {
highest.setText(sharedpreferences.getString(Highest, ""));
getHi=highest.getText().toString();
}
if (sharedpreferences.contains(Lowest)) {
lowest.setText(sharedpreferences.getString(Lowest, ""));
}
int hi = Integer.parseInt(getHi);
/*
* If checked then receive text, better design would probably be to stop thread if unchecked and free resources, but this is a quick fix
*/
if (chkReceiveText.isChecked()) {
mTxtReceive.post(new Runnable() {
#Override
public void run() {
mTxtReceive.append(strInput);
System.out.println(strInput);
if(data < hi){
Log.d(TAG, "succes");
}
int txtLength = mTxtReceive.getEditableText().length();
if(txtLength > mMaxChars){
mTxtReceive.getEditableText().delete(0, txtLength - mMaxChars);
Log.d(TAG, "text longer than allowed:" + mTxtReceive.getEditableText().delete(0, txtLength - mMaxChars));
}
if (chkScroll.isChecked()) { // Scroll only if this is checked
scrollView.post(new Runnable() { // Snippet from http://stackoverflow.com/a/4612082/1287554
#Override
public void run() {
scrollView.fullScroll(View.FOCUS_DOWN);
}
});
}
}
});
}
}
Thread.sleep(500);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void stop() {
bStop = true;
}
}
private class DisConnectBT extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
}
#Override
protected Void doInBackground(Void... params) {
if (mReadThread != null) {
mReadThread.stop();
while (mReadThread.isRunning())
; // Wait until it stops
mReadThread = null;
}
try {
mBTSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
mIsBluetoothConnected = false;
if (mIsUserInitiatedDisconnect) {
finish();
}
}
}
private void msg(String s) {
Toast.makeText(getApplicationContext(), s, Toast.LENGTH_SHORT).show();
}
#Override
protected void onPause() {
if (mBTSocket != null && mIsBluetoothConnected) {
new DisConnectBT().execute();
}
Log.d(TAG, "Paused");
super.onPause();
}
#Override
protected void onResume() {
if (mBTSocket == null || !mIsBluetoothConnected) {
new ConnectBT().execute();
}
Log.d(TAG, "Resumed");
super.onResume();
}
#Override
protected void onStop() {
Log.d(TAG, "Stopped");
super.onStop();
}
#Override
protected void onSaveInstanceState(Bundle outState) {
// TODO Auto-generated method stub
super.onSaveInstanceState(outState);
}
private class ConnectBT extends AsyncTask<Void, Void, Void> {
private boolean mConnectSuccessful = true;
#Override
protected void onPreExecute() {
progressDialog = ProgressDialog.show(MonitoringScreen.this, "Hold on", "Connecting");// http://stackoverflow.com/a/11130220/1287554
}
#Override
protected Void doInBackground(Void... devices) {
try {
if (mBTSocket == null || !mIsBluetoothConnected) {
mBTSocket = mDevice.createInsecureRfcommSocketToServiceRecord(mDeviceUUID);
BluetoothAdapter.getDefaultAdapter().cancelDiscovery();
mBTSocket.connect();
}
} catch (IOException e) {
// Unable to connect to device
e.printStackTrace();
mConnectSuccessful = false;
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
if (!mConnectSuccessful) {
Toast.makeText(getApplicationContext(), "Could not connect to device. Is it a Serial device? Also check if the UUID is correct in the settings", Toast.LENGTH_LONG).show();
finish();
} else {
msg("Connected to device");
mIsBluetoothConnected = true;
mReadThread = new ReadInput(); // Kick off input reader
}
progressDialog.dismiss();
}
}
}
i want to change the String to int from this part:
final String strInput = new String(buffer, 0, i);
so i can use it on this part :
if(data < hi){
Log.d(TAG, "succes");
}
i tried to use
int data = Integer.parseInt(strInput);
but well of course it span error because its string buffer and only the first one is changed
so how do i solve this prob?if any one can help
I already tried using arraylist but still error
Here is the error code :
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.test.aplikasirevisi, PID: 21905
java.lang.NumberFormatException: For input string: "40
"
at java.lang.Integer.parseInt(Integer.java:615)
at java.lang.Integer.parseInt(Integer.java:650)
at com.test.aplikasirevisi.MonitoringScreen$ReadInput$1.run(MonitoringScreen.java:152)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:201)
at android.app.ActivityThread.main(ActivityThread.java:6810)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
I/Process: Sending signal. PID: 21905 SIG: 9
The error message is telling you what is wrong. Your input appears to be "40 and " is not a numeric character. You need make sure your inputted strings are numeric OR you need to extract the numeric component from the string BEFORE attempting to convert it into an integer. You could try new String(buffer, 1, i) if the character at index 0 is always the double quote character.
UPDATE:
Based on your last comment posted here, you need to initialize your strInput as follows (This is an example):
byte[] bytes = new byte[5];
bytes[0] = 49; // this is the ASCII value of the number "1"
bytes[1] = '\u0000'; // These are null characters
bytes[2] = '\u0000';
bytes[3] = '\u0000';
bytes[4] = '\u0000';
String temp = new String(bytes); // convert the byte array to String
String str = temp.substring(0, temp.indexOf('\u0000')); // parse the numeric contents
System.out.println(str); // You should see "1" printed out
int number = Integer.parseInt(str); // Because I parsed the numeric contents, it is safe to convert the String to a number.
Hello guys I got a code that I do for my project, the code is to get the value of the heartbeat sensor from Arduino to my android phone using Bluetooth. So far it's going well it can send the value to my app without a problem. but the problem now is I want to get the value of it so I can use my algorithm with it, but seems like I got in a pickle now.
Here is the code :
package com.test.aplikasirevisi;
import java.io.IOException;
import java.io.InputStream;
import java.util.UUID;
import android.app.Activity;
import android.app.ProgressDialog;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toast;
public class MonitoringScreen extends Activity {
private static final String TAG = "BlueTest5-MainActivity";
private int mMaxChars = 50000;//Default
private UUID mDeviceUUID;
private BluetoothSocket mBTSocket;
private ReadInput mReadThread = null;
private boolean mIsUserInitiatedDisconnect = false;
private TextView mTxtReceive;
private Button mBtnClearInput;
private ScrollView scrollView;
private CheckBox chkScroll;
private CheckBox chkReceiveText;
private boolean mIsBluetoothConnected = false;
private BluetoothDevice mDevice;
private ProgressDialog progressDialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_monitoring_screen);
ActivityHelper.initialize(this);
Intent intent = getIntent();
Bundle b = intent.getExtras();
mDevice = b.getParcelable(MainActivity.DEVICE_EXTRA);
mDeviceUUID = UUID.fromString(b.getString(MainActivity.DEVICE_UUID));
mMaxChars = b.getInt(MainActivity.BUFFER_SIZE);
Log.d(TAG, "Ready");
mTxtReceive = (TextView) findViewById(R.id.txtReceive);
chkScroll = (CheckBox) findViewById(R.id.chkScroll);
chkReceiveText = (CheckBox) findViewById(R.id.chkReceiveText);
scrollView = (ScrollView) findViewById(R.id.viewScroll);
mBtnClearInput = (Button) findViewById(R.id.btnClearInput);
mTxtReceive.setMovementMethod(new ScrollingMovementMethod());
mBtnClearInput.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
mTxtReceive.setText("");
}
});
}
private class ReadInput implements Runnable{
private boolean bStop = false;
private Thread t;
public ReadInput() {
t = new Thread(this, "Input Thread");
t.start();
}
public boolean isRunning() {
return t.isAlive();
}
#Override
public void run() {
InputStream inputStream;
try {
inputStream = mBTSocket.getInputStream();
while (!bStop) {
byte[] buffer = new byte[256];
if (inputStream.available() > 0) {
inputStream.read(buffer);
int i;
/*
* This is needed because new String(buffer) is taking the entire buffer i.e. 256 chars on Android 2.3.4 http://stackoverflow.com/a/8843462/1287554
*/
for (i = 0; i < buffer.length && buffer[i] != 0; i++) {
}
final String strInput = new String(buffer, 0, i);
/*
* If checked then receive text, better design would probably be to stop thread if unchecked and free resources, but this is a quick fix
*/
if (chkReceiveText.isChecked()) {
mTxtReceive.post(new Runnable() {
#Override
public void run() {
mTxtReceive.append(strInput);
int txtLength = mTxtReceive.getEditableText().length();
if(txtLength > mMaxChars){
mTxtReceive.getEditableText().delete(0, txtLength - mMaxChars);
System.out.println(mTxtReceive.getText().toString());
}
if (chkScroll.isChecked()) { // Scroll only if this is checked
scrollView.post(new Runnable() { // Snippet from http://stackoverflow.com/a/4612082/1287554
#Override
public void run() {
scrollView.fullScroll(View.FOCUS_DOWN);
}
});
}
}
});
}
}
Thread.sleep(500);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void stop() {
bStop = true;
}
}
private class DisConnectBT extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
}
#Override
protected Void doInBackground(Void... params) {
if (mReadThread != null) {
mReadThread.stop();
while (mReadThread.isRunning())
; // Wait until it stops
mReadThread = null;
}
try {
mBTSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
mIsBluetoothConnected = false;
if (mIsUserInitiatedDisconnect) {
finish();
}
}
}
private void msg(String s) {
Toast.makeText(getApplicationContext(), s, Toast.LENGTH_SHORT).show();
}
#Override
protected void onPause() {
if (mBTSocket != null && mIsBluetoothConnected) {
new DisConnectBT().execute();
}
Log.d(TAG, "Paused");
super.onPause();
}
#Override
protected void onResume() {
if (mBTSocket == null || !mIsBluetoothConnected) {
new ConnectBT().execute();
}
Log.d(TAG, "Resumed");
super.onResume();
}
#Override
protected void onStop() {
Log.d(TAG, "Stopped");
super.onStop();
}
#Override
protected void onSaveInstanceState(Bundle outState) {
// TODO Auto-generated method stub
super.onSaveInstanceState(outState);
}
private class ConnectBT extends AsyncTask<Void, Void, Void> {
private boolean mConnectSuccessful = true;
#Override
protected void onPreExecute() {
progressDialog = ProgressDialog.show(MonitoringScreen.this, "Hold on", "Connecting");// http://stackoverflow.com/a/11130220/1287554
}
#Override
protected Void doInBackground(Void... devices) {
try {
if (mBTSocket == null || !mIsBluetoothConnected) {
mBTSocket = mDevice.createInsecureRfcommSocketToServiceRecord(mDeviceUUID);
BluetoothAdapter.getDefaultAdapter().cancelDiscovery();
mBTSocket.connect();
}
} catch (IOException e) {
// Unable to connect to device
e.printStackTrace();
mConnectSuccessful = false;
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
if (!mConnectSuccessful) {
Toast.makeText(getApplicationContext(), "Could not connect to device. Is it a Serial device? Also check if the UUID is correct in the settings", Toast.LENGTH_LONG).show();
finish();
} else {
msg("Connected to device");
mIsBluetoothConnected = true;
mReadThread = new ReadInput(); // Kick off input reader
}
progressDialog.dismiss();
}
}
}
What i want is to get the value of mTxtReceive on this :
int txtLength = mTxtReceive.getEditableText().length();
if(txtLength > mMaxChars){
mTxtReceive.getEditableText().delete(0, txtLength - mMaxChars);
System.out.println(mTxtReceive.getText().toString());
}
I used System.out.println for seeing if i got the value but in the log it didn't show any thing.
So i need you guys wisdom for this any help?
Your view mTextReceive seems to be a TextView and therefore not editable:
private TextView mTxtReceive;
If it's not an EditText (editable) mTxtReceive.getEditableText will return null see docs
and getText should be called instead see docs.
Therefore your condition might always resolve from
if(txtLength > mMaxChars) into if(null > 50000) which is always false (or actually it might even crash before) and therefore your code inside the if-block is never executed
Try:
// recommended for debugging. Check if this is even called and if text length is really longer than max chars
Log.d(TAG, "text length:" + mTxtReceive.getText().length());
int txtLength = mTxtReceive.getText().length();
if(txtLength > mMaxChars){
// not sure what operation you want to do here but leave out for debugging
Log.d(TAG, "text longer than allowed:" + mTxtReceive.getText().toString());
}
Also use Log.d instead of System.out.println since your log might otherwise not be forwarded to Logcat. Also are you sure this block is executed at all? I'd put a Log.d(TAG, "text length:" + mTxtReceive.getText().length()); outside of the condition for debugging purposes. And finally the obvious question would be if the txtLength is even longer than max chars (and that would be quite a long text with 50000 chars). But you can verify that simply with the recommended log outside the block as well.
I want to use run keeper API in my Code as I am developing Application which will track walking distance etc . This can be done by using Run Keeper API.
During registering my app, it ask me to enter post call back URL , I don't know from where to get The CALL BACK URL :(
Here is the code where I am stuck.
package com.example.testapp;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.CookieManager;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener {
private Button button;
private WebView webView;
private final static String CLIENT_ID = "b25ef732fdea4fc1a5d59036f05cfad0";
private final static String CLIENT_SECRET = "741a1216e5f14c38b5768840d6720d2c";
private final static String CALLBACK_URL = "";
#SuppressLint("SetJavaScriptEnabled")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Force to login on every launch.
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.removeAllCookie();
button = (Button) findViewById(R.id.button);
webView = (WebView) findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
}
#Override
public void onClick(View v) {
button.setVisibility(View.GONE);
webView.setVisibility(View.VISIBLE);
getAuthorizationCode();
}
private void getAuthorizationCode() {
String authorizationUrl = "https://runkeeper.com/apps/authorize";
authorizationUrl = String.format(authorizationUrl, CLIENT_ID,CALLBACK_URL);
Toast.makeText(MainActivity.this, "Milestone 1", Toast.LENGTH_SHORT).show();
webView.setWebViewClient(new WebViewClient() {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Toast.makeText(MainActivity.this, url, Toast.LENGTH_SHORT).show();
if (url.startsWith(CALLBACK_URL)) {
final String authCode = Uri.parse(url).getQueryParameter("code");
webView.setVisibility(View.GONE);
getAccessToken(authCode);
return true;
}
return super.shouldOverrideUrlLoading(view, url);
}
});
webView.loadUrl(authorizationUrl);
}
private void getAccessToken(String authCode) {
Toast.makeText(MainActivity.this, "Milestone 3", Toast.LENGTH_SHORT).show();
String accessTokenUrl = "https://runkeeper.com/apps/token";
final String finalUrl = String.format(accessTokenUrl, authCode,CLIENT_ID, CLIENT_SECRET);
Thread networkThread = new Thread(new Runnable() {
#Override
public void run() {
try {
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(finalUrl);
HttpResponse response = client.execute(post);
String jsonString = EntityUtils.toString(response
.getEntity());
final JSONObject json = new JSONObject(jsonString);
String accessToken = json.getString("access_token");
getTotalDistance(accessToken);
} catch (Exception e) {
displayToast("Exception occured:(");
e.printStackTrace();
resetUi();
}
}
});
networkThread.start();
}
private void getTotalDistance(String accessToken) {
try {
HttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet("http://api.runkeeper.com/user/");
get.addHeader("Authorization", "Bearer " + accessToken);
get.addHeader("Accept", "*/*");
HttpResponse response = client.execute(get);
String jsonString = EntityUtils.toString(response.getEntity());
JSONArray jsonArray = new JSONArray(jsonString);
findTotalWalkingDistance(jsonArray);
} catch (Exception e) {
displayToast("Exception occured:(");
e.printStackTrace();
resetUi();
}
}
private void findTotalWalkingDistance(JSONArray arrayOfRecords) {
try {
// Each record has activity_type and array of statistics. Traverse
// to activity_type = Walking
for (int ii = 0; ii < arrayOfRecords.length(); ii++) {
JSONObject statObject = (JSONObject) arrayOfRecords.get(ii);
if ("Walking".equalsIgnoreCase(statObject
.getString("activity_type"))) {
// Each activity_type has array of stats, navigate to
// "Overall" statistic to find the total distance walked.
JSONArray walkingStats = statObject.getJSONArray("stats");
for (int jj = 0; jj < walkingStats.length(); jj++) {
JSONObject iWalkingStat = (JSONObject) walkingStats
.get(jj);
if ("Overall".equalsIgnoreCase(iWalkingStat
.getString("stat_type"))) {
long totalWalkingDistanceMeters = iWalkingStat
.getLong("value");
double totalWalkingDistanceMiles = totalWalkingDistanceMeters * 0.00062137;
displayTotalWalkingDistance(totalWalkingDistanceMiles);
return;
}
}
}
}
displayToast("Something went wrong!!!");
} catch (JSONException e) {
displayToast("Exception occured:(");
e.printStackTrace();
resetUi();
}
}
private void resetUi() {
runOnUiThread(new Runnable() {
#Override
public void run() {
button.setVisibility(View.VISIBLE);
webView.setVisibility(View.GONE);
}
});
}
private void displayTotalWalkingDistance(double totalWalkingDistanceMiles) {
final String milesWalkedMessage = (totalWalkingDistanceMiles < 1) ? "0 miles?, You get no respect, Start walking already!!!"
: String.format("Cool, You have walked %.2f miles so far.",
totalWalkingDistanceMiles);
displayToast(milesWalkedMessage);
resetUi();
}
private void displayToast(final String message) {
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getApplicationContext(), message,
Toast.LENGTH_LONG).show();
}
});
}
}
I found this Runkeeper CallBack Hope it works for you. All the best.
com.example.runkeeperapi://RunKeeperIsCallingBack"
I have a working FTP system with android, but I want to be able to track the bytes as they get uploaded, so I can update a progress bar as the upload progresses. Is this possible with Android? Right now, I'm using org.apache.common.net.ftp and the code I'm using is below. Also, I am running this in an AsyncTask.
package com.dronnoc.ftp.complex;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.SocketException;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.io.CopyStreamEvent;
import org.apache.commons.net.io.CopyStreamListener;
import org.apache.commons.net.io.Util;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Window;
public class Main extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.main);
String text = "BIGFILE"; //Big file here
InputStream data = new ByteArrayInputStream(text.getBytes());
new ComplexFTPTransfer().execute(data);
}
private class ComplexFTPTransfer extends AsyncTask<InputStream, Long[], Void>
{
private FTPClient ftp = null;
#Override
protected void onPreExecute() {
super.onPreExecute();
try {
ftp = new FTPClient();
ftp.connect("hostname");
} catch (SocketException e) {
this.cancel(true);
} catch (IOException e) {
this.cancel(true);
}
Main.this.setProgressBarIndeterminateVisibility(true);
}
#Override
protected Void doInBackground(InputStream... params) {
if(!this.isCancelled())
{
try
{
if(ftp.login("user", "pass"))
{
ftp.enterLocalPassiveMode();
InputStream item = params[0];
int streamSize = 0;
while(item.read() != -1)
{
streamSize++;
}
InputStream is = new BufferedInputStream(params[0], streamSize);
OutputStream os = ftp.storeFileStream("/test.txt");
Util.copyStream(is, os, streamSize, streamSize, new CopyStreamListener() {
#Override
public void bytesTransferred(long totalBytesTransferred, int bytesTransferred, long streamSize) {
publishProgress(new Long[] {totalBytesTransferred, streamSize});
}
#Override
public void bytesTransferred(CopyStreamEvent event) {
}
});
ftp.completePendingCommand();
}
ftp.logout();
ftp.disconnect();
}
catch (IOException e) {
}
catch (Exception e) {
}
}
return null;
}
#Override
protected void onProgressUpdate(Long[]... values) {
super.onProgressUpdate(values);
Log.d("UPDATE", values[0] + " of " + values[1] + " copied.");
//TODO Put code here
}
#Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
Main.this.setProgressBarIndeterminateVisibility(false);
}
}
}
What I want to know is if I can run a progress bar, updating every few uploaded bytes?
Cheers
This question has an implementation of an InputStream that includes a progress callback. Use that InputStream and call publishProgress from that callback for incremental updates during the file upload.
Download this .jar file
httpmime-4.1.1.jar and commons-net.jar
try {
FTPClient ftpClient = new FTPClient();
ftpClient.connect(InetAddress
.getByName(Your host Url));
ftpClient.login(loginName, password);
System.out.println("status :: " + ftpClient.getStatus());
ftpClient.changeWorkingDirectory(your directory name);
ftpClient.setFileType(FTP.IMAGE_FILE_TYPE);
//Your File path set here
File file = new File("/sdcard/my pictures/image.png");
BufferedInputStream buffIn = new BufferedInputStream(
new FileInputStream(myImageFile));
ftpClient.enterLocalPassiveMode();
ProgressInputStream progressInput = new ProgressInputStream(
buffIn);
boolean result = ftpClient.storeFile(UPLOADFILENAME + ".png",
progressInput);
System.out.println("result is :: " + result);
buffIn.close();
ftpClient.logout();
ftpClient.disconnect();
} catch (Exception e) {
e.printStackTrace();
}
//ProgressInputStream
import java.io.IOException;
import java.io.InputStream;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
public class ProgressInputStream extends InputStream {
/* Key to retrieve progress value from message bundle passed to handler */
public static final String PROGRESS_UPDATE = "progress_update";
private static final int TEN_KILOBYTES = 1024 * 40;
private InputStream inputStream;
//private Handler handler;
private long progress;
private long lastUpdate;
private boolean closed;
public ProgressInputStream(InputStream inputStream) {
this.inputStream = inputStream;
this.progress = 0;
this.lastUpdate = 0;
this.closed = false;
}
#Override
public int read() throws IOException {
int count = inputStream.read();
return incrementCounterAndUpdateDisplay(count);
}
#Override
public int read(byte[] b, int off, int len) throws IOException {
int count = inputStream.read(b, off, len);
return incrementCounterAndUpdateDisplay(count);
}
#Override
public void close() throws IOException {
super.close();
if (closed)
throw new IOException("already closed");
closed = true;
}
private int incrementCounterAndUpdateDisplay(int count) {
if (count < 0)
progress += count;
lastUpdate = maybeUpdateDisplay(progress, lastUpdate);
return count;
}
private long maybeUpdateDisplay(long progress, long lastUpdate) {
if (progress - lastUpdate < TEN_KILOBYTES) {
lastUpdate = progress;
sendLong(PROGRESS_UPDATE, progress);
}
return lastUpdate;
}
public void sendLong(String key, long value) {
Bundle data = new Bundle();
data.putLong(key, value);
Message message = Message.obtain();
message.setData(data);
//handler.sendMessage(message);
}
}
This can be done using Secure FTP Factory library.
You just need to implement an instance of the com.jscape.inet.ftp.FtpListener interface, register the instance with the Ftp class and overload the progress(FtpProgressEvent event) method to capture progress information.
JavaDoc: Overview (secure FTP Factory API)
Download: Java FTP, Java FTPS and Java SFTP Components
i was made a bluetooth printer application (android based) for printing some text using datecs DPP-350 printer device. this program use a datecs external library such as bluetoohconnector and RFComm package. it works nicely, here's the code:
package com.myapp.MobilePrinter1;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import com.djarum.MobilePrinter1.BluetoothConnector;
import com.datecs.api.card.FinancialCard;
import com.datecs.api.printer.Printer;
import com.datecs.api.printer.PrinterInformation;
import com.datecs.api.printer.ProtocolAdapter;
import com.datecs.api.printer.ProtocolAdapter.Channel;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnDismissListener;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class MobilePrinter1Activity extends Activity {
public static final String CONNECTION_STRING = "connection_string";
private final Handler mHandler = new Handler();
private final Thread mConnectThread = new Thread() {
#Override
public void run() {
String connectionString = "bth://00:01:90:E6:40:52";
showProgress("Connecting");
if (connectionString.startsWith("bth://")) {
String address = connectionString.substring(6);
connectBth(address);
} else {
throw new IllegalArgumentException("Unsupported connection string");
}
dismissProgress();
}
void connectBth(String address) {
//setPrinterInfo(R.drawable.help, address);
try {
mBthConnector = BluetoothConnector.getConnector(MobilePrinter1Activity.this);
mBthConnector.connect(address);
mPrinter = getPrinter(
mBthConnector.getInputStream(),
mBthConnector.getOutputStream());
} catch (IOException e) {
//error(R.drawable.bluetooth, e.getMessage());
return;
}
mPrinterInfo = getPrinterInfo();
}
Printer getPrinter(InputStream in, OutputStream out) throws IOException {
ProtocolAdapter adapter = new ProtocolAdapter(in, out);
Printer printer = null;
if (adapter.isProtocolEnabled()) {
Channel channel = adapter.getChannel(ProtocolAdapter.CHANNEL_PRINTER);
InputStream newIn = channel.getInputStream();
OutputStream newOut = channel.getOutputStream();
printer = new Printer(newIn, newOut);
} else {
printer = new Printer(in, out);
}
return printer;
}
PrinterInformation getPrinterInfo() {
PrinterInformation pi = null;
try {
pi = mPrinter.getInformation();
//setPrinterInfo(R.drawable.printer, pi.getName());
} catch (IOException e) {
e.printStackTrace();
}
return pi;
}
};
private BluetoothConnector mBthConnector;
private Printer mPrinter;
private PrinterInformation mPrinterInfo;
private ProgressDialog mProgressDialog;
private BluetoothConnector mConnector;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
try {
mConnector = BluetoothConnector.getConnector(this);
} catch (IOException e) {
Toast.makeText(this, e.getMessage(), Toast.LENGTH_SHORT);
finish();
}
findViewById(R.id.button1).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
printText();
}
});
findViewById(R.id.button2).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
printBarcode();
}
});
findViewById(R.id.button3).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
printImage();
}
});
}
public void printText() {
new Thread() {
#Override
public void run() {
//showProgress(R.string.printing_text);
doPrintText2();
dismissProgress();
}
}.start();
}
public void printBarcode() {
new Thread() {
#Override
public void run() {
//showProgress(R.string.printing_text);
doPrintBarcode();
dismissProgress();
}
}.start();
}
public void printImage() {
new Thread() {
#Override
public void run() {
//showProgress(R.string.printing_text);
doPrintImage();
dismissProgress();
}
}.start();
}
#Override
protected void onStart() {
super.onStart();
mConnectThread.start();
}
#Override
protected void onStop() {
super.onStop();
if (mBthConnector != null) {
try {
mBthConnector.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
private void showProgress(final String text) {
mHandler.post(new Runnable() {
#Override
public void run() {
mProgressDialog = ProgressDialog.show(
MobilePrinter1Activity.this,
"Please wait",
text,
true);
}
});
}
private void showProgress(int resId) {
showProgress(getString(resId));
}
private void dismissProgress() {
mHandler.post(new Runnable() {
#Override
public void run() {
mProgressDialog.dismiss();
}
});
}
private void doPrintSelfTest() {
try {
mPrinter.printSelfTest();
} catch (IOException e) {
//error(R.drawable.selftest, getString(R.string.failed_print_self_test) + ". " +
//e.getMessage());
}
}
private void doPrintText2() {
EditText EditText1;
EditText1=(EditText)findViewById(R.id.editText1);
String temp;
try {
mPrinter.reset();
mPrinter.printTaggedText(EditText1.getText().toString());
//mPrinter.printTaggedText("Testing Testing!!");
mPrinter.feedPaper(110);
} catch (IOException e) {
//error(R.drawable.text, getString(R.string.failed_print_text) + ". " +
//e.getMessage());
}
}
private void doPrintBarcode() {
EditText EditText1;
EditText1=(EditText)findViewById(R.id.editText1);
try {
mPrinter.reset();
mPrinter.setBarcode(Printer.ALIGN_CENTER, false, 2, Printer.HRI_BOTH, 100);
mPrinter.printBarcode(Printer.BARCODE_CODE128, EditText1.getText().toString());
mPrinter.feedPaper(38);
mPrinter.feedPaper(110);
} catch (IOException e) {
//error(R.drawable.barcode, getString(R.string.failed_print_barcode) + ". " +
//e.getMessage());
}
}
private void doPrintImage() {
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.logo_djarum);
final int width = bitmap.getWidth();
final int height = bitmap.getHeight();
final int[] argb = new int[width * height];
bitmap.getPixels(argb, 0, width, 0, 0, width, height);
try {
mPrinter.reset();
mPrinter.printImage(argb, width, height, Printer.ALIGN_LEFT, true);
mPrinter.feedPaper(110);
} catch (IOException e) {
Toast.makeText(MobilePrinter1Activity.this, e.getMessage(), 1).show();
}
}
private void dialog(final int id, final String title, final String msg) {
mHandler.post(new Runnable() {
#Override
public void run() {
AlertDialog dlg = new AlertDialog.Builder(MobilePrinter1Activity.this)
.setTitle(title)
.setMessage(msg)
.create();
dlg.setIcon(id);
dlg.show();
}
});
}
private void error(final int resIconId, final String message) {
mHandler.post(new Runnable() {
#Override
public void run() {
AlertDialog dlg = new AlertDialog.Builder(MobilePrinter1Activity.this)
.setTitle("Error")
.setMessage(message)
.create();
dlg.setIcon(resIconId);
dlg.setOnDismissListener(new OnDismissListener() {
#Override
public void onDismiss(DialogInterface dialog) {
MobilePrinter1Activity.this.finish();
}
});
dlg.show();
}
});
}
private void setPrinterInfo(final int resIconId, final String text) {
mHandler.post(new Runnable() {
#Override
public void run() {
//((ImageView)findViewById(R.id.icon)).setImageResource(resIconId);
//((TextView)findViewById(R.id.name)).setText(text);
}
});
}
}
the main problems now is how to call this program from phonegap? i've tried using droidGap but it will give me error when i start the printer's thread. has anyone know how to solved this?? many thanks..
I dont think that you can invoke too many APIs from the standard android browser (except some like location, contacts n all), but what is possible is other way round embedding a webview in a native app(which can be your above mentioned thread code) and invoking this code from a Javascript event using JavaScript Interface apis of android platform (which is pretty straight forward).