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ShakeActivity 1st launch to be neglected - java

I wanted to create a webview that comes on shakeactivity. In xml of current activity, I made webview visibility as invisibe. Now, I have this shakeevent listener. Everything is working fine, except I start this shakeactivity on its first launch it displays shaking in toast in text i included that, which i have in onShake() function. But, I dont want that. I want to neglect the first launch of this shakeactivity and after 2nd shake i want to refresh the shakeactivity to load a url and visibility of webview to visible.
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Vibrator;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.webkit.WebView;
import android.widget.Toast;
public class MainActivity extends Activity implements
ShakeEventManager.shakeListener {
private ShakeEventManager sd;
private static long back_pressed;
Boolean isInternetPresent = false;
private int count = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
createData();
sd = new ShakeEventManager();
sd.setListener(this);
sd.init(this);
}
private void createData() {
WebView web = (WebView) findViewById(R.id.webview);
web.getSettings().setJavaScriptEnabled(true);
web.getSettings().setPluginsEnabled(true);
web.loadUrl("http://www.google.com");
}
#Override
public void onShake() {
count++;
if (count >= 1) {
ConnectionDetector cd = new ConnectionDetector(
getApplicationContext());
isInternetPresent = cd.isConnectingToInternet();
Vibrator vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(1000);
if (isInternetPresent) {
createData();
} else {
Toast.makeText(getApplicationContext(),
"Enable Data Connection", Toast.LENGTH_LONG).show();
}
}
}
#Override
public void onResume() {
super.onResume();
sd.register();
}
#Override
protected void onPause() {
super.onPause();
sd.deregister();
}
#Override
public void onBackPressed() {
finish();
}
}

Your count++ variable increasing value first before checking condition first time so that you may have to increase in if as i have done or you can put this statement at the last after condition.
Change like following:
#Override
public void onShake() {
if (count++ >= 1) {
ConnectionDetector cd = new ConnectionDetector(
getApplicationContext());
isInternetPresent = cd.isConnectingToInternet();
Vibrator vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(1000);
if (isInternetPresent) {
createData();
} else {
Toast.makeText(getApplicationContext(),
"Enable Data Connection", Toast.LENGTH_LONG).show();
}
}
}
Note: I dont have tested but i just saw your code and found this
logical mistake so may be helpful to you :)

Related

I've tried many other threads and articles but I just can't find the right stuff that I am looking for.
So I have a MainActivity and a SettingsActivity both are java classes. In my main activity there is a button when pressed, increases the count by +1, and shows it on a TextView, it also makes the device vibrate on every increment/Every button press. I want to make a switchpreference in SettingsActivity which if kept off/false, turns off the vibration on button press and if kept on/true, turns on the vibration on button press.
I don't know how to retrieve the state of SwitchPreferenceCompat(ON OR OFF) from SettingsActivity and use it in the MainActivity, so if the user turns the switch off in setting activity, the vibration should stop on button press which is in MainActivity.
I have already used Shared Preferences in MainActivity for saving the current count/number when App is closed and resumes from the same count when reopened.
MainAcitivity
package com.saad.tapcounter;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.preference.PreferenceManager;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Vibrator;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import com.google.android.gms.ads.MobileAds;
public class MainActivity extends AppCompatActivity {
private AdView mAdView ;
int Start;
TextView txt;
Button btnU,btnT,btnR;
Switch sw,sw2;
private ConstraintLayout Clayout;
Vibrator vibe;
Boolean switchPref;
SharedPreferences sharedPreferences;
private static long back_pressed;
private Vibrator Vibrator;
//Double Tap Exit
#Override
public void onBackPressed()
{
if (back_pressed + 2000 > System.currentTimeMillis()) super.onBackPressed();
else Toast.makeText(getBaseContext(), "Press once again to exit!", Toast.LENGTH_SHORT).show();
back_pressed = System.currentTimeMillis();
}
//Inflater for Menu
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu,menu);
return true;
}
//Menu
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
switch(item.getItemId()){
case R.id.menui1:
startActivity(new Intent(this, SettingsActivity.class));
return true;
default:
return super.onOptionsItemSelected(item);
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = findViewById(R.id.toolbarid);
setSupportActionBar(toolbar);
MobileAds.initialize(this, "-APPID-");
mAdView = findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder().build();
mAdView.loadAd(adRequest);
vibe =(Vibrator)getSystemService(VIBRATOR_SERVICE);
Clayout = findViewById(R.id.MainLayout);
btnT = findViewById(R.id.tapbtn);
btnR = findViewById(R.id.resetbtn);
btnU = findViewById(R.id.undobtn);
sw = findViewById(R.id.swch);
sw2 = findViewById(R.id.darkswch);
txt = findViewById(R.id.txtv);
txt.setTextColor(Color.BLACK);
sharedPreferences = getSharedPreferences("0",MODE_PRIVATE);
loadData();
setData();
incrementbtn();
undobtn();
resetbtn();
switchbtn();
themeswitch();
}
public void loadData(){
sharedPreferences = getSharedPreferences("0",MODE_PRIVATE);
}
private void setData(){
Start = sharedPreferences.getInt("0",0);
if(Start==0){
txt.setText("0");
}
else{
txt.setText(Integer.toString(Start));
}
}
public void incrementbtn(){
btnT.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
incvibe();
if (Start != 0) {
Start = sharedPreferences.getInt("0", 0);
Start += 1;
txt.setText(Integer.toString(Start));
txtresize();
} else {
Start += 1;
txt.setText(Integer.toString(Start));
}
sharedPreferences.edit().putInt("0", Start).apply();
}
});
}
public void undobtn(){
btnU.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
undovibe();
if (Start != 0) {
Start = sharedPreferences.getInt("0", 0);
Start -= 1;
txt.setText(Integer.toString(Start));
}
else{
return;
}
sharedPreferences.edit().putInt("0", Start).apply();
}
});
}
public void resetbtn(){
btnR.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
resetvibe();
Start = 0;
txt.setText(Integer.toString(Start));
sharedPreferences.edit().putInt("0", Start).apply();
}
});
}
public void switchbtn(){
sw.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(sw.isChecked()) {
btnR.setEnabled(false);
btnT.setEnabled(false);
btnU.setEnabled(false);
txt.setTextColor(Color.RED);
}
else{
btnR.setEnabled(true);
btnT.setEnabled(true);
btnU.setEnabled(true);
if(sw2.isChecked()){
txt.setTextColor(Color.WHITE);
}
else{
txt.setTextColor(Color.BLACK);
}
}
}
});
}
public void themeswitch(){
sw2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(sw2.isChecked()){
Clayout.setBackgroundColor(Color.DKGRAY);
if(sw.isChecked()){
txt.setTextColor(Color.RED);
}
else{
txt.setTextColor(Color.WHITE);
}
}
else{
Clayout.setBackgroundColor(Color.WHITE);
if(sw.isChecked()){
txt.setTextColor(Color.RED);
}
else{
txt.setTextColor(Color.BLACK);
}
}
}
});
}
public void txtresize(){
if(Start > 1000 && Start < 10000){
txt.setTextSize(80);
}
else if (Start > 10000 && Start < 100000){
txt.setTextSize(60);
}
else if (Start > 100000){
txt.setTextSize(40);
}
else{
return;
}
}
StringBuilder info = new StringBuilder();
public void undovibe(){
vibe.vibrate(100);
}
public void resetvibe(){
vibe.vibrate(150);
}
public void incvibe(){
vibe.vibrate(40);
}
}//Real one
SettingActivity (created it from NEW > SettingActivity)
I did try some stuff by myself in here but it crashed my app.
package com.saad.tapcounter;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.widget.Toast;
import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.AppCompatActivity;
import androidx.preference.PreferenceFragmentCompat;
import androidx.preference.PreferenceManager;
public class SettingsActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.settings_activity);
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.settings, new SettingsFragment())
.commit();
ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayHomeAsUpEnabled(true);
}
}
public static class SettingsFragment extends PreferenceFragmentCompat {
#Override
public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
setPreferencesFromResource(R.xml.root_preferences, rootKey);
}
}
}
root_preference.xml
<PreferenceScreen xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android">
<PreferenceCategory app:title="Settings"
app:iconSpaceReserved="false">
<SwitchPreferenceCompat
app:key="Switchsett1"
app:title="Vibration"
app:summaryOff="Turn Vibration On"
app:summaryOn="Turn Vibration Off"
app:iconSpaceReserved="false"
app:defaultValue="true"
/>
<SwitchPreferenceCompat
app:key="Switchset2"
app:iconSpaceReserved="false"
app:summaryOff="#string/attachment_summary_off"
app:summaryOn="#string/attachment_summary_on"
app:title="#string/attachment_title" />
</PreferenceCategory>
</PreferenceScreen>

I don't know how to retrieve the state of switch(ON OR OFF) from SettingsActivity
To get the value of SwitchPreferenceCompat from shared preference, then you need to retrieve it as a Boolean
Now the key of your first SwitchPreferenceCompat is Switchsett1, so to retrieve the value of this:
public class MainActivity extends AppCompatActivity {
Boolean switchPref;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
....
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
switchPref = prefs.getBoolean("Switchsett1", false);
Toast.makeText(this, String.valueOf(switchPref), Toast.LENGTH_SHORT).show(); // shows true if the SwitchPreferenceCompat is ON, and false if OFF.
Now the Toast in the above script shows true if the SwitchPreferenceCompat is ON, and false if it's OFF.
You can do the same for Switchset2 SwitchPreferenceCompat

Here is the code for the button which should start and pause the audio.
I have checked the button-text == "start" or "pause" and change the text and use the appropriate methods accordingly
i.e mediaplayer.start() and mediaplayer.pause().
But still, the audio won't play.
package com.example.demo;
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity
{
MediaPlayer mediaPlayer;//Mediaplayer
Button button;
public void start(View view)
{
String text = button.getText().toString();
if (text == "start")
{
mediaPlayer.start(); //starting the audio
button.setText("pause");
}
else
{
mediaPlayer.pause(); //pausing the audio
button.setText("start");
}
}
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = findViewById(R.id.start);
mediaPlayer = MediaPlayer.create(this,R.raw.music);
}
}

There are a few steps you should try:
First, try this because I think It gives always a false condition:
if(text.trim().equals("start"))
If Still not work Try this one:
public class MainActivity extends AppCompatActivity
{
MediaPlayer mediaPlayer;//Mediaplayer
Button button;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = findViewById(R.id.start);
mediaPlayer = MediaPlayer.create(this,R.raw.music);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String text = button.getText().toString().trim();
if (text.equals("start"))
{
mediaPlayer.start();
button.setText("pause");
}
else
{
mediaPlayer.pause();
button.setText("start");
}
}
}
} }

I am trying to write an android app that streams from an icecast server when you click play. This is for a radio station that I help out in my area, and they need to get out in the community, and be able to advertise. I have written some android apps before, but my experience with this is limited.
There are no errors in the code according to android studio, and the app does everything the way it is supposed to except play the stream. I have tested the stream on my browser, and it is up and running.
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
Button b_play;
MediaPlayer mediaPlayer;
boolean prepared = false;
boolean started = false;
String stream = "<server address>";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b_play = (Button) findViewById(R.id.b_play);
b_play.setEnabled(false);
b_play.setText("LOADING...");
mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
new PlayerTask().execute(stream);
b_play.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if(started) {
started = false;
mediaPlayer.pause();
b_play.setText("PLAY");
}else{
started = true;
mediaPlayer.start();
b_play.setText("PAUSE");
}
}
});
}
class PlayerTask extends AsyncTask<String, Void, Boolean>{
#Override
protected Boolean doInBackground(String... strings) {
try {
mediaPlayer.setDataSource(strings[0]);
mediaPlayer.prepare();
prepared = true;
} catch (IOException e) {
e.printStackTrace();
}
return prepared;
}
#Override
protected void onPostExecute(Boolean aboolean) {
super.onPostExecute(aboolean);
mediaPlayer.start();
b_play.setEnabled(true);
b_play.setText("PLAY");
}
}
#Override
protected void onPause() {
super.onPause();
if(started) {
mediaPlayer.pause();
}
}
#Override
protected void onResume() {
super.onResume();
if(started) {
mediaPlayer.start();
}
}
#Override
protected void onDestroy() {
super.onDestroy();
if(prepared){
mediaPlayer.release();
}
}
}

Icecast has delay picking up Android apps. If you have 32k streaming it can take up to 40 seconds for the stream to load. 64k can take awhile also.
Shoutcast servers pick up almost instantly.
https://androidaudio.info/android-audio-buffering-issues-with-32k-acc-icecast-server/

I have this code that initializes text to speech. However, text to speech takes around ten seconds to load so I would like it to be done in async. How can I do this without changing the functionality of my code?
import java.util.Locale;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.app.Activity;
import android.speech.tts.TextToSpeech;
import android.util.Log;
import android.view.View;
import android.content.res.Resources;
import android.view.Window;
import android.view.WindowManager;
import android.widget.TextView;
import android.widget.Button;
import java.lang.String;
import java.util.Random;
public class MainActivity extends Activity implements TextToSpeech.OnInitListener{
TextToSpeech tts;
private static final Random r_generator = new Random();
String textViewString;
int MY_DATA_CHECK_CODE = 1234;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
Resources res = getResources();
TextView tv = (TextView) findViewById(R.id.animal_text);
String loadingString = res.getString(R.string.Loading);
tv.setText(loadingString);
Intent checkIntent = new Intent();
checkIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
startActivityForResult(checkIntent, MY_DATA_CHECK_CODE);
}
protected void onActivityResult(
int requestCode, int resultCode, Intent data) {
if (requestCode == MY_DATA_CHECK_CODE) {
if (resultCode == TextToSpeech.Engine.CHECK_VOICE_DATA_PASS) {
// success, create the TTS instance
tts = new TextToSpeech(this, this);
} else {
// missing data, install it
Intent installIntent = new Intent();
installIntent.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
startActivity(installIntent);
}
}
}
#Override
public void onInit(int status) {
int result=tts.setLanguage(Locale.US);
if(result==TextToSpeech.LANG_MISSING_DATA ||
result==TextToSpeech.LANG_NOT_SUPPORTED){
Log.e("error", "This Language is not supported");
}
Resources res = getResources();
TextView tv = (TextView) findViewById(R.id.animal_text);
String[] myString = res.getStringArray(R.array.englishAnimalArray);
String q = myString[r_generator.nextInt(myString.length)];
tv.setText(q);
textViewString = tv.getText().toString();
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB) {
tts.speak(textViewString, TextToSpeech.QUEUE_FLUSH, null);
} else {
tts.speak(textViewString, TextToSpeech.QUEUE_FLUSH, null, null);
}
}

I'd suggest you can take this by using AsyncTask.
An AsyncTask works as follows:
private ProgressDialog pDialog; // Progress Dialog to load during the AsyncTask
private class InitializeSpeechEngine extends AsyncTask<Void, Void, Void>{
#Override
protected void onPreExecute(Void aVoid){
// Initialization code goes inside onPreExecute
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setTitle("Loading Speech to Text Engine");
pDialog.setMessage("Please Wait...");
pDialog.setCancellable(false);
pDialog.show();
}
#Override
protected void doInBackground(Void... params){
// Perform the speech to text initialization here
}
#Override
protected void onPostExecute(Void aVoid){
// Display Toast that the engine is ready for use.
pDialog.dismiss();
Toast.makeText(MainActivity.this, "Speech to text engine initialization complete", Toast.LENGTH_SHORT).show();
}
#Override
protected void onProgressUpdate(Void... params){
}
You can start executing the AsyncTask by making the following call.
new InitialiazeSpeechEngine().execute();

I was reading over http://android-developers.blogspot.com/2009/04/backward-compatibility-for-android.html But I'm really not grasping how to ignore certain lines of code. I have this Activity (posted below) and it's a simple webview. However, I want to have geolocation enabled(even if it is only for 2.0 and up phones), since these methods weren't introduced until SDK 5 (android 2.0) and I would like the webview to be able to at the very least be able to load on a 1.5 phone rather than just crashing. Could someone possibly show me how to take this code and make it ignore the lines of code that i pointed out with the starred comments when the users phone SDK is LESS than SDK 5?
package com.my.app;
import com.facebook.android.R;
//NEEDS TO BE IGNORED**********************************************************
import android.webkit.GeolocationPermissions;
import android.webkit.GeolocationPermissions.Callback;
//END**************************************************************************
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.webkit.CookieSyncManager;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
//GeolocationPermissionsCallback NEEDS TO BE IGNORED**********************************************************
public class Places extends Activity implements GeolocationPermissions.Callback{
private ProgressDialog progressBar;
public WebView webview;
private static final String TAG = "Main";
String geoWebsiteURL = "http://google.com";
#Override
public void onStart()
{
super.onStart();
CookieSyncManager.getInstance().sync();
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
CookieSyncManager.createInstance(this);
CookieSyncManager.getInstance().startSync();
webview = (WebView) findViewById(R.id.webview);
webview.setWebViewClient(new testClient());
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setPluginsEnabled(true);
webview.loadUrl("http://google.com");
progressBar = ProgressDialog.show(Places.this, "", "Loading Page...");
//THIS NEEDS TO BE IGNORED************************************************************
webview.getSettings().setGeolocationEnabled(true);
GeoClient geo = new GeoClient();
webview.setWebChromeClient(geo);
}
public void invoke(String origin, boolean allow, boolean remember) {
}
final class GeoClient extends WebChromeClient {
#Override
public void onGeolocationPermissionsShowPrompt(String origin,
Callback callback) {
super.onGeolocationPermissionsShowPrompt(origin, callback);
callback.invoke(origin, true, false);
}
//END OF CODE THAT NEEDS TO BE IGNORED************************************************
}
private class testClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Log.i(TAG, "Processing webview url click...");
view.loadUrl(url);
return true;
}
public void onPageFinished(WebView view, String url) {
Log.i(TAG, "Finished loading URL: " +url);
if (progressBar.isShowing()) {
progressBar.dismiss();
}
if (url.startsWith("mailto:") || url.startsWith("geo:") ||
url.startsWith("tel:")) {
Intent intent = new Intent
(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
}
}
}
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webview.canGoBack()) {
webview.goBack();
return true;
}
if (keyCode == KeyEvent.KEYCODE_SEARCH) {
Intent z = new Intent(this, Search.class);
startActivity(z);
}
return super.onKeyDown(keyCode, event);
}
public boolean onCreateOptionsMenu (Menu menu) {
super.onCreateOptionsMenu(menu);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected (MenuItem item) {
switch (item.getItemId()) {
case R.id.home:
Intent m = new Intent(this, Home.class);
startActivity(m);
return true;
case R.id.refresh:
webview.reload();
Toast.makeText(this, "Refreshing...", Toast.LENGTH_SHORT).show();
return true;
}
return false;
}
public void onStop()
{
super.onStop();
CookieSyncManager.getInstance().sync();
}
}

There are (at least) two possible solutions for your problem:
Different versions for different OS - create different builds of your software for different OS. This is a common approach, a lot of open source projects offer different builds for linux, windows, mac os. Your case is similiar, you could create different builds for android 1.5, 2.0, ...
One version for all Android OS - If you can find a way to detect the version of the OS at runtime, then you can redesign your code to run on different OS. You can add special classes for android 1.6 and 2.0 and make sure, that only the correct classes are loaded.
A quick example for your code:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// ...
progressBar = ProgressDialog.show(Places.this, "", "Loading Page...");
if (isGeolocationAvailable()) {
Android20Util.enableGeolocation(webview);
}
}
Android20Util contains some static methods, like:
public static void enableGeolocation(WebView webview) {
webview.getSettings().setGeolocationEnabled(true);
webview.setWebChromeClient(new GeoClient());
}