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Is there any other option rather that switch case statement?

I am making one simple bank transfer Android application with Google voice input. So, basically, in my app I have created one method layoutclicked() for number of clicks on the layout. I have initialized numberOfclicks as 0 initially, so when user taps on the screen it increments. It will start voice input as well.
public void layoutClicked(View view)
{
if(IsInitialVoiceFinshed) {
numberOfClicks++;
listen();
}
}
I have created switch case statement for filling the input field, so like when case is 1, i.e user tap on the screen one time, then it will start voice input and user tell the details. It will set that text to that input field. And, again, in case 2 it will do another task.
If the user does not say anything in the first case, the field will be empty. And in case 2, they will go to another field. I want to fill that first input field. Can we achieve this by using for loop?
Here is my complete Java code
package org.tensorflow.lite.examples.detection;
import android.annotation.SuppressLint;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.speech.RecognizerIntent;
import android.speech.tts.TextToSpeech;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Locale;
public class Banktransfer extends AppCompatActivity {
private TextToSpeech tts;
private TextView status;
private TextView To;
private TextView Subject;
private TextView To1;
private int numberOfClicks;
static String to;
float x1,x2;
private boolean IsInitialVoiceFinshed;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.bank_transfer);
IsInitialVoiceFinshed = false ;
tts = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
#Override
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS) {
int result = tts.setLanguage(Locale.UK);
if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED) {
Log.e("TTS", "This Language is not supported");
}
tts.speak("Welcome to Bank transfer. tap on the screen , Tell me the IFSC code of bank",TextToSpeech.QUEUE_FLUSH,null);
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
IsInitialVoiceFinshed=true;
}
}, 8500);
} else {
Log.e("TTS", "Initilization Failed!");
}
}
});
status = (TextView)findViewById(R.id.status);
To = (TextView) findViewById(R.id.to);
Subject = findViewById(R.id.subject);
To1 = (TextView) findViewById(R.id.to1);
numberOfClicks = 0;
}
#Override
public void onDestroy() {
if (tts != null) {
tts.stop();
tts.shutdown();
}
super.onDestroy();
}
public void layoutClicked(View view)
{
if(IsInitialVoiceFinshed) {
numberOfClicks++;
listen();
}
}
private void listen(){
Intent i = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
i.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
i.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.getDefault());
i.putExtra(RecognizerIntent.EXTRA_PROMPT, "Say something");
try {
startActivityForResult(i, 100);
} catch (ActivityNotFoundException a) {
Toast.makeText(Banktransfer.this, "Your device doesn't support Speech Recognition", Toast.LENGTH_SHORT).show();
}
}
#SuppressLint("SetTextI18n")
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == 100&& IsInitialVoiceFinshed){
IsInitialVoiceFinshed = false;
if (resultCode == RESULT_OK && null != data) {
ArrayList<String> result = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
if(result.get(0).contains("cancel"))
{
tts.speak("Transaction Cancelled!",TextToSpeech.QUEUE_FLUSH,null);
}
else {
switch (numberOfClicks) {
case 1:
To1.setText("");
String ifsc;
ifsc = result.get(0).replace(" ","");
char[] str=ifsc.toCharArray();
for(int i=0;i< str.length;i++){
To1.append(str[i]+"");
Toast.makeText(getApplicationContext(), To1.getText().toString(), Toast.LENGTH_SHORT).show();
}
if(!To1.getText().toString().isEmpty()) {
tts.speak("tap on the screen & say, account number to whom you want to transfer money? ",TextToSpeech.QUEUE_FLUSH,null);
}
break;
case 2:
to = result.get(0).replaceAll("[^\\d.]", "");
To.setText(to);
if(!to.isEmpty()) {
tts.speak("tap on the screen & say, how much money you want to transfer",TextToSpeech.QUEUE_FLUSH,null);
}
break;
case 3:
String amount;
amount = result.get(0).replaceAll("[^\\d.]", "");
Subject.setText(amount);
status.setText("confirm");
if(!amount.isEmpty()) {
tts.speak("Please Confirm the details , IFSC code is "+To1.getText().toString()+",Account number is: " + Arrays.toString(To.getText().toString().split("(?!^)")) + ". And Money that you want to transfer is ,: " + Subject.getText().toString() +"rupees"+ ",Tap on the screen and Speak Yes to confirm",TextToSpeech.QUEUE_FLUSH,null);
tts.speak(",swipe left to listen again, or say Yes to confirm or no to cancel the transaction",TextToSpeech.QUEUE_ADD,null);
}
break;
default:
if(result.get(0).equals("yes")) {
if (To.getText().toString().equals("")) {
if (Subject.getText().toString().equals("")) {
tts.speak("Details may be incorrect or incomplete, canceling the transaction",TextToSpeech.QUEUE_FLUSH,null);
final Handler h = new Handler(Looper.getMainLooper());
h.postDelayed(new Runnable() {
#Override
public void run() {
Intent i = new Intent(Banktransfer.this,MainActivity.class);
startActivity(i);
}
},8000);
}
} else {
status.setText("transferring money ");
tts.speak("transferring money please wait",TextToSpeech.QUEUE_FLUSH,null);
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
status.setText("Amount transferred successfully.");
tts.speak("Amount transferred successfully.",TextToSpeech.QUEUE_FLUSH,null);
}
}, 6000);
final Handler handler1 = new Handler();
handler1.postDelayed(new Runnable() {
#Override
public void run() {
finish();
Intent intent = new Intent(Banktransfer.this, MainActivity.class);
startActivity(intent);
tts.speak("you are in main menu. just swipe right and say what you want", TextToSpeech.QUEUE_FLUSH, null);
}
}, 9000);
}
}
else if(result.get(0).contains("no")){
tts.speak("transaction cancelled",TextToSpeech.QUEUE_FLUSH,null);
To.setText("");
Subject.setText("");
IsInitialVoiceFinshed=true;
final Handler handler1 = new Handler();
handler1.postDelayed(new Runnable() {
#Override
public void run() {
finish();
Intent intent = new Intent(Banktransfer.this,MainActivity.class);
startActivity(intent);
}
},3000);
}
}
}
}
else {
switch (numberOfClicks) {
case 1:
break;
case 2:
break;
default:
tts.speak("say yes to proceed the transaction or no to cancel the transaction",TextToSpeech.QUEUE_FLUSH,null);
break;
}
numberOfClicks--;
}
}
IsInitialVoiceFinshed=true;
}
public boolean onTouchEvent(MotionEvent touchEvent) {
switch (touchEvent.getAction()) {
case MotionEvent.ACTION_DOWN:
x1 = touchEvent.getX();
break;
case MotionEvent.ACTION_UP:
x2 = touchEvent.getX();
if (x1 < x2) {
tts.speak("Please Confirm the details , IFSC code is "+To1.getText().toString()+"Account number is: " + Arrays.toString(To.getText().toString().split("(?!^)")) + ". And Money that you want to transfer is ,: " + Subject.getText().toString() +"rupees"+ ",Tap on the screen and Speak Yes to confirm",TextToSpeech.QUEUE_FLUSH,null);
tts.speak("swipe left to listen again, and say Yes to confirm or no to cancel the transaction",TextToSpeech.QUEUE_ADD,null);
break;
}
if (x1 > x2) {
break;
}
break;
}
return false;
}
public void onPause() {
if (tts != null) {
tts.stop();
}
super.onPause();
}
}
bank_transfer.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#faa519"
android:orientation="vertical"
android:onClick = "layoutClicked"
xmlns:android="http://schemas.android.com/apk/res/android">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="48dp"
android:background="#e8e8e7"
android:orientation="horizontal">
<TextView
android:id="#+id/status"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_gravity="center_horizontal|center_vertical"
android:layout_marginLeft="25dp"
android:text="Bank transfer"
android:textColor="#2582C5"
android:textSize="18sp"
android:textStyle="bold" />
</RelativeLayout>
<LinearLayout android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginLeft="16dp"
android:layout_marginTop="16dp"
android:layout_marginRight="16dp"
android:layout_marginBottom="30dp"
android:orientation="vertical">
<ImageView
android:layout_width="161dp"
android:layout_height="77dp"
android:layout_gravity="center_horizontal"
android:layout_marginTop="15dp"
android:src="#drawable/bank" />
<TextView
android:id="#+id/to1"
android:layout_width="fill_parent"
android:layout_height="85dp"
android:layout_marginTop="70dp"
android:background="#f3f3f3"
android:paddingLeft="7dp"
android:paddingTop="7dp"
android:text="IFSC Code"
android:textColor="#4C4D4F" />
<TextView
android:id="#+id/to"
android:layout_width="fill_parent"
android:layout_height="85dp"
android:layout_marginTop="80dp"
android:background="#f3f3f3"
android:paddingLeft="7dp"
android:paddingTop="7dp"
android:text="Acc. no"
android:textColor="#4C4D4F" />
<TextView
android:id="#+id/subject"
android:layout_width="fill_parent"
android:layout_height="95dp"
android:layout_marginTop="95dp"
android:background="#f3f3f3"
android:text="Transfer money:- "
android:textColor="#4C4D4F" />
</LinearLayout>
<LinearLayout android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>
</LinearLayout>

Instead of using switch statement You can use the codes below:
if(//){
}else if(//){
}else if(//){
}else if(//){
}else{
//
}
but switch statement, it's simpler and readable than the if and else if

Android/Java - CountDown Timer not working

I am making a timer as part of my app. I followed a tutorial, and made some modifications to the program to better suit my needs. However, when I run the app, I get the default value of the timerTextView (defined in xml), or just random numbers. What is going wrong?
Update: Here is the coomplete code for the activity:
public class Main7Activity extends AppCompatActivity {
private TextView countDownText;
private CountDownTimer countDownTimer;
//private long timeLeftInMilliseconds = 1000*60*60*24*7*1;
public TextView textView3;
public TextView textView4;
public TextView textView5;
public TextView textView6;
public long timeLeftInMilliseconds;
//private int daysToGo;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main7);
textView3 = (TextView) findViewById(R.id.testText);
textView4 = (TextView) findViewById(R.id.testText2);
textView5 = (TextView) findViewById(R.id.testText3);
textView6 = (TextView) findViewById(R.id.testText4);
//textView3.setText(Integer.toString(Main6Activity.progress2));
Calendar now = Calendar.getInstance();
textView3.setText("LMP date : " + Main6Activity.textView.getText());
int currentDayOfYear = now.get(Calendar.DAY_OF_YEAR);
//Day of year is the LMP date
now.set(Calendar.DAY_OF_YEAR, Main6Activity.progress2);
int lmpDate = now.get(Calendar.DAY_OF_YEAR);
//Day of year is due date
now.add(Calendar.DAY_OF_YEAR, 7*40);
textView4.setText("Due Date: " + now.get(Calendar.DATE) + "-"
+ (now.get(Calendar.MONTH) + 1) + "-" + now.get(Calendar.YEAR));
int dueDate = now.get(Calendar.DAY_OF_YEAR);
if (dueDate < 365 && lmpDate > 82){
dueDate = dueDate + (365);
}
if (lmpDate<82 && lmpDate>49){
dueDate = dueDate + lmpDate;
}
if (lmpDate<50) {
textView5.setText("Congratulations on Delivery");
}
else {
textView5.setText(Integer.toString(dueDate));
}
//textView5.setText(now.getTime().toString());
//int currentDayOfYear = Calendar.DAY_OF_YEAR;
int daysToGo = dueDate - currentDayOfYear;
textView6.setText(Integer.toString(daysToGo));
timeLeftInMilliseconds = 1000*60*60*24*daysToGo;
countDownText = (TextView) findViewById(R.id.weeks);
startTimer();
}
public void startTimer(){
countDownTimer = new CountDownTimer(timeLeftInMilliseconds, 1000) {
#Override
public void onTick(long millisUntilFinished) {
timeLeftInMilliseconds = millisUntilFinished;
updateTimer();
}
#Override
public void onFinish() {
}
}.start();
}
public void updateTimer(){
int weeks = (int) timeLeftInMilliseconds / 604800000;
int days = (int) (timeLeftInMilliseconds % 604800000) / 86400000;
//int hours = (int) (timeLeftInMilliseconds % 86400000) / 3600000;
//int minutes = (int) (timeLeftInMilliseconds % 3600000) / 60000;
int seconds = (int) (timeLeftInMilliseconds % 60000) / 1000;
String timeLeftText;
timeLeftText = "";
if (weeks < 10) timeLeftText += "0";
timeLeftText += weeks;
timeLeftText += ":";
if (days < 10) timeLeftText += "0";
timeLeftText += days;
//timeLeftText += ":";
//if (hours < 10) timeLeftText += "0";
//timeLeftText += hours;
//timeLeftText += ":";
//timeLeftText += minutes;
//timeLeftText += ":";
if (seconds < 10) timeLeftText += "0";
timeLeftText += seconds;
countDownText.setText(timeLeftText);
}
public void editInfo(View v){
Intent intent = new Intent(Main7Activity.this, Main6Activity.class);
startActivity(intent);
}
}
I also need the timer to run in the background. Will this code do that?
Thanks.

Try to declare those variables :
Handler countHandler ;
Runnable countRunnable ;
private final long INTERVAL = 1000 ; // this the interval period which the timer will be triggered each time
Then change your method like this :
public void startTimer(){
countHandler = new Handler() ;
countRunnable = new Runnable() {
#Override
public void run() {
updateTimer();
timeLeftInMilliseconds= timeLeftInMilliseconds - INTERVAL ;
if(timeLeftInMilliseconds>=0){
countHandler.postDelayed(this, INTERVAL) ;
} else {
cancelTimer(); // here timer is finished
}
}
} ;
countHandler.post(countRunnable) ;
}
public void cancelTimer(){
countHandler.removeCallbacks(countRunnable);
}

Try the code below.
Timer_Service.java
import android.app.Service;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Handler;
import android.os.IBinder;
import android.preference.PreferenceManager;
import android.support.annotation.Nullable;
import android.util.Log;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.TimeUnit;
public class Timer_Service extends Service {
public static String str_receiver = "your_package_name.receiver";
private Handler mHandler = new Handler();
Calendar calendar;
SimpleDateFormat simpleDateFormat;
String strDate;
Date date_current, date_diff;
SharedPreferences mpref;
SharedPreferences.Editor mEditor;
private Timer mTimer = null;
public static final long NOTIFY_INTERVAL = 1000;
Intent intent;
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
super.onCreate();
mpref = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
mEditor = mpref.edit();
calendar = Calendar.getInstance();
simpleDateFormat = new SimpleDateFormat("HH:mm:ss");
mTimer = new Timer();
mTimer.scheduleAtFixedRate(new TimeDisplayTimerTask(), 5, NOTIFY_INTERVAL);
intent = new Intent(str_receiver);
}
class TimeDisplayTimerTask extends TimerTask {
#Override
public void run() {
mHandler.post(new Runnable() {
#Override
public void run() {
calendar = Calendar.getInstance();
simpleDateFormat = new SimpleDateFormat("HH:mm:ss");
strDate = simpleDateFormat.format(calendar.getTime());
Log.e("strDate", strDate);
twoDatesBetweenTime();
}
});
}
}
public String twoDatesBetweenTime() {
try {
date_current = simpleDateFormat.parse(strDate);
} catch (Exception e) {
}
try {
date_diff = simpleDateFormat.parse(mpref.getString("data", ""));
} catch (Exception e) {
}
try {
long diff = date_current.getTime() - date_diff.getTime();
int int_hours = Integer.valueOf(mpref.getString("hours", ""));
long int_timer = TimeUnit.HOURS.toMillis(int_hours);
long long_hours = int_timer - diff;
long diffSeconds2 = long_hours / 1000 % 60;
long diffMinutes2 = long_hours / (60 * 1000) % 60;
long diffHours2 = long_hours / (60 * 60 * 1000) % 24;
if (long_hours > 0) {
String str_testing = diffHours2 + ":" + diffMinutes2 + ":" + diffSeconds2;
Log.e("TIME", str_testing);
fn_update(str_testing);
} else {
mEditor.putBoolean("finish", true).commit();
mTimer.cancel();
}
} catch (Exception e) {
mTimer.cancel();
mTimer.purge();
}
return "";
}
#Override
public void onDestroy() {
super.onDestroy();
Log.e("Service finish", "Finish");
}
private void fn_update(String str_time) {
intent.putExtra("time", str_time);
sendBroadcast(intent);
}
}
Your Timer.java activity:
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.text.SimpleDateFormat;
import java.util.Calendar;
public class Timer extends AppCompatActivity implements View.OnClickListener {
private Button btn_start, btn_cancel;
private TextView tv_timer;
String date_time;
Calendar calendar;
SimpleDateFormat simpleDateFormat;
EditText et_hours;
SharedPreferences mpref;
SharedPreferences.Editor mEditor;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_timer);
init();
}
private void init() {
btn_start = (Button) findViewById(R.id.btn_timer);
tv_timer = (TextView) findViewById(R.id.tv_timer);
et_hours = (EditText) findViewById(R.id.et_hours);
btn_cancel = (Button) findViewById(R.id.btn_cancel);
btn_start.setOnClickListener(this);
btn_cancel.setOnClickListener(this);
mpref = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
mEditor = mpref.edit();
try {
String str_value = mpref.getString("data", "");
if (str_value.matches("")) {
et_hours.setEnabled(true);
btn_start.setEnabled(true);
tv_timer.setText("");
} else {
if (mpref.getBoolean("finish", false)) {
et_hours.setEnabled(true);
btn_start.setEnabled(true);
tv_timer.setText("");
} else {
et_hours.setEnabled(false);
btn_start.setEnabled(false);
tv_timer.setText(str_value);
}
}
} catch (Exception e) {
}
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_timer:
if (et_hours.getText().toString().length() > 0) {
int int_hours = Integer.valueOf(et_hours.getText().toString());
if (int_hours <= 24) {
et_hours.setEnabled(false);
btn_start.setEnabled(false);
calendar = Calendar.getInstance();
simpleDateFormat = new SimpleDateFormat("HH:mm:ss");
date_time = simpleDateFormat.format(calendar.getTime());
mEditor.putString("data", date_time).commit();
mEditor.putString("hours", et_hours.getText().toString()).commit();
Intent intent_service = new Intent(getApplicationContext(), Timer_Service.class);
startService(intent_service);
} else {
Toast.makeText(getApplicationContext(), "Please select the value below 24 hours", Toast.LENGTH_SHORT).show();
}
/*
mTimer = new Timer();
mTimer.scheduleAtFixedRate(new TimeDisplayTimerTask(), 5, NOTIFY_INTERVAL);*/
} else {
Toast.makeText(getApplicationContext(), "Please select value", Toast.LENGTH_SHORT).show();
}
break;
case R.id.btn_cancel:
Intent intent = new Intent(getApplicationContext(), Timer_Service.class);
stopService(intent);
mEditor.clear().commit();
et_hours.setEnabled(true);
btn_start.setEnabled(true);
tv_timer.setText("");
break;
}
}
private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String str_time = intent.getStringExtra("time");
tv_timer.setText(str_time);
}
};
#Override
protected void onResume() {
super.onResume();
registerReceiver(broadcastReceiver, new IntentFilter(Timer_Service.str_receiver));
}
#Override
protected void onPause() {
super.onPause();
unregisterReceiver(broadcastReceiver);
}
}
Your activity_timer.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText
android:id="#+id/et_hours"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginRight="5dp"
android:hint="Hours"
android:inputType="time" />
<Button
android:id="#+id/btn_timer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/btn_cancel"
android:text="Start Timer" />
<Button
android:id="#+id/btn_cancel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="cancel timer" />
<TextView
android:id="#+id/tv_timer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="00:00:00"
android:textColor="#000000"
android:textSize="25dp" />
</RelativeLayout>
Resource reference: this link.
You need to do some modifications according to your requirement. The countdown will continue even if you close the app.

java:54: error: class, interface, or enum expected and Build failed with an exception

i want to build a photoplayer. I have 2 file, one is xml file which have 2 buttons and 1 image view, another one is the java class to run the program so that can see the preious and next photo in image view. However, there are 2 error that i cant run the program and i dont know why.
The second one
package com.fyp.user.myapplication;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Gallery;
import android.widget.ImageView;
/**
* Created by User on 2/12/2015.
*/
public class photoplayer extends MainActivity {
int[] imgID = {R.drawable.apple};
private Button btnPrev, btnNext;
private ImageView imgPhoto;
int p = 0;
int count = imgID.length;
#Override
protected void onCreate(Bundle savedInstancestate) {
super.onCreate(savedInstancestate);
setContentView(R.layout.numberplayer);
btnPrev = (Button) findViewById(R.id.btnprev);
btnNext = (Button) findViewById(R.id.btnnext);
imgPhoto = (ImageView) findViewById(R.id.imgPlayer);
btnPrev.setOnClickListener(btnPrevListerner);
btnNext.setOnClickListener(btnNextListerner);
}
private Button.OnClickListener btnPrevListerner = new Button.OnClickListener() {
public void onClick(View v) {
p--;
if (p < 0)
p = count - 1;
imgPhoto.setImageResource(imgID[p]);
setTitle("Num" + (p + 1) + "/" + count);
}
};
private Button.OnClickListener btnNextListerner = new Button.OnClickListener() {
public void onClick(View v) {
p++;
if (p == count)
p = 0;
imgPhoto.setImageResource(imgID[p]);
setTitle("Num" + (p + 1) + "/" + count);
}
};
}
}
The first one
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Previous"
android:id="#+id/btnprev" />
<ImageView
android:layout_width="81dp"
android:layout_height="140dp"
android:id="#+id/imgPlayer"
android:scaleType="fitCenter"
android:layout_gravity="center_vertical"
android:src="#drawable/apple" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="next"
android:id="#+id/btnnext" />
</LinearLayout>

java:54: error: class, interface, or enum expected
with an exception
There is an extra closing curly bracket } in your code.Remove the last closing curly bracket and you will be good.

Unable to Interact with Android Custom Dialog

Ok, bear with me because I haven't worked with custom Dialogs (or Android programming at all really) that much, and I'm sure I've made a stupid beginner mistake.
So I have a simple dice rolling app that I'm trying to incorporate into my existing app, but I want to do it as essentially a popup. The solution I found thus far was to extend a dialog class and use the xml from the app as a custom layout. This actually displays the expected output, but doesn't allow me to interact with it (i.e. it shows dice on screen but I can't roll them!).
The java class I'm calling is this:
import java.io.IOException;
import java.util.Random;
import com.zeldar.scanner.R;
import android.app.Activity;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
public class RollDice extends Activity implements SensorEventListener {
private final int rollAnimations = 50;
private final int delayTime = 15;
private Resources res;
private final int[] diceImages = new int[] { R.drawable.d1, R.drawable.d2, R.drawable.d3, R.drawable.d4, R.drawable.d5, R.drawable.d6 };
private Drawable dice[] = new Drawable[6];
private final Random randomGen = new Random();
#SuppressWarnings("unused")
private int diceSum;
private int roll[] = new int[] { 6, 6 };
private ImageView die1;
private ImageView die2;
private LinearLayout diceContainer;
private SensorManager sensorMgr;
private Handler animationHandler;
private long lastUpdate = -1;
private float x, y, z;
private float last_x, last_y, last_z;
private boolean paused = false;
private static final int UPDATE_DELAY = 50;
private static final int SHAKE_THRESHOLD = 400;
#Override
public void onCreate(Bundle savedInstanceState) {
paused = false;
super.onCreate(savedInstanceState);
setContentView(R.layout.dice);
setTitle(getString(R.string.app_name));
res = getResources();
for (int i = 0; i < 6; i++) {
dice[i] = res.getDrawable(diceImages[i]);
}
diceContainer = (LinearLayout) findViewById(R.id.diceContainer);
diceContainer.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
try {
rollDice();
} catch (Exception e) {};
}
});
die1 = (ImageView) findViewById(R.id.die1);
die2 = (ImageView) findViewById(R.id.die2);
animationHandler = new Handler() {
public void handleMessage(Message msg) {
die1.setImageDrawable(dice[roll[0]]);
die2.setImageDrawable(dice[roll[1]]);
}
};
sensorMgr = (SensorManager) getSystemService(SENSOR_SERVICE);
boolean accelSupported = sensorMgr.registerListener(this,
sensorMgr.getDefaultSensor(SensorManager.SENSOR_ACCELEROMETER), SensorManager.SENSOR_DELAY_GAME);
if (!accelSupported) sensorMgr.unregisterListener(this); //no accelerometer on the device
rollDice();
}
private void rollDice() {
if (paused) return;
new Thread(new Runnable() {
#Override
public void run() {
for (int i = 0; i < rollAnimations; i++) {
doRoll();
}
}
}).start();
MediaPlayer mp = MediaPlayer.create(this, R.raw.roll);
try {
mp.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
mp.start();
}
private void doRoll() { // only does a single roll
roll[0] = randomGen.nextInt(6);
roll[1] = randomGen.nextInt(6);
diceSum = roll[0] + roll[1] + 2; // 2 is added because the values of the rolls start with 0 not 1
synchronized (getLayoutInflater()) {
animationHandler.sendEmptyMessage(0);
}
try { // delay to alloy for smooth animation
Thread.sleep(delayTime);
} catch (final InterruptedException e) {
e.printStackTrace();
}
}
public void onResume() {
super.onResume();
paused = false;
}
public void onPause() {
super.onPause();
paused = true;
}
#Override
public void onSensorChanged(SensorEvent event) {
Sensor mySensor = event.sensor;
if (mySensor.getType() == SensorManager.SENSOR_ACCELEROMETER) {
long curTime = System.currentTimeMillis();
if ((curTime - lastUpdate) > UPDATE_DELAY) {
long diffTime = (curTime - lastUpdate);
lastUpdate = curTime;
x = event.values[SensorManager.DATA_X];
y = event.values[SensorManager.DATA_Y];
z = event.values[SensorManager.DATA_Z];
float speed = Math.abs(x + y + z - last_x - last_y - last_z) / diffTime * 10000;
if (speed > SHAKE_THRESHOLD) { //the screen was shaked
rollDice();
}
last_x = x;
last_y = y;
last_z = z;
}
}
}
#Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
return; //this method isn't used
}
}
And this is the layout xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/diceContainer"
android:orientation="vertical"
android:gravity="center"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp" >
<ImageView
android:id="#+id/die1"
android:src="#drawable/d6"
android:layout_width="150dp"
android:layout_height="150dp"
android:layout_marginBottom="15dp"
android:contentDescription="#string/content_dice" />
<ImageView
android:id="#+id/die2"
android:src="#drawable/d6"
android:layout_width="150dp"
android:layout_height="150dp"
android:contentDescription="#string/content_dice" />
</LinearLayout>
Finally, the call I'm using to create the dialog:
private Dialog rollDice;
rollDice = new Dialog(ScanActivity.this);
rollDice.setContentView(R.layout.dice);
rollDice.setTitle("Roll Dice");
rollDice.setCancelable(true);
rollDice.show();
To clarify: the most confusing part is that I'm not getting an error, either on compile or run time, it just pops up the window and won't let me do anything with it (except dismiss)!

I would suggest using an activity with a dialog theme if you are wanting something like a dialog. This will allow it to "pop-up" like a dialog but give you more flexibility and easier to manipulate, IMHO. Create a separate activity to open up and add this to your manifest for the activity
<activity android:theme="#android:style/Theme.Dialog">
Themes
There may be a better way to do this but I think this might work well for you.

Created a simple timer on Android, doesn't work as expected

I'm trying display a timer on my app with a Thread calculating the elapsed time and a Handler to modify the view.
I know that Android doesn't allow other threads that the UI Thread to modify a view, so I use the Handler to do this.
But it seems that it was not effective, because I still have the "android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views."
What should I do ?
(Oh, and the code is bellow if this might help)
package com.hangin.arround.emergency;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.SherlockActivity;
public class MainActivity extends SherlockActivity {
private static final String TAG = "MainActivity";
private TextView elapsedTime;
private Button startButton;
private Button stopButton;
private boolean shouldContinue = false;
private Handler mHandler;
private Runnable runnable;
private static final int MESSAGE_ELAPSED_TIME = 1;
#Override
protected void onCreate(Bundle savedInstanceState) {
// Creating the action bar, initializing my views and stuff
// Creating the Handler
mHandler = new Handler() {
#SuppressLint("SimpleDateFormat")
#Override
public void handleMessage(Message msg){
super.handleMessage(msg);
switch(msg.what) {
case MESSAGE_ELAPSED_TIME :
// Converting from milliseconds to a String
DateFormat formatter = new SimpleDateFormat("hh:mm:ss.SSS");
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(msg.arg1);
String elapsedTimeString = formatter.format(calendar.getTime());
elapsedTime.setText(elapsedTimeString);
break;
default:
break;
}
}
};
// Creating the Runnable
runnable = new Runnable(){
#Override
public void run() {
int startTime, actualTime;
startTime = (int) System.currentTimeMillis();
Log.d(TAG, "startTime = " + startTime);
while(shouldContinue) {
// Calcul du temps écoulé
actualTime = (int)System.currentTimeMillis() - startTime;
Log.d(TAG, "actualTime = " + actualTime);
// Creating the message sent to the Handler
Message elapsedTimeMessage = new Message();
elapsedTimeMessage.what = MESSAGE_ELAPSED_TIME;
elapsedTimeMessage.arg1 = (int) actualTime;
// Sending the message
mHandler.handleMessage(elapsedTimeMessage);
}
}
};
// Adding the OnClickListeners on startButton and stopButton
startButton.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v) {
// Launching Thread
(new Thread(runnable)).start();
shouldContinue = true;
}
});
stopButton.setOnClickListener(new OnClickListener(){
#Override
public void onClick(View v) {
// Stopping the thread
shouldContinue = false;
}
});
}
}

Change
Message elapsedTimeMessage = new Message();
elapsedTimeMessage.what = MESSAGE_ELAPSED_TIME;
elapsedTimeMessage.arg1 = (int) actualTime;
// Sending the message
mHandler.handleMessage(elapsedTimeMessage);
to
Message.obtain(mHandler, MESSAGE_ELAPSED_TIME, (int) actualTime, 0).sendToTarget();
From the API docs, it seems handleMessage is something called later in the handling process and shouldn't be invoked directly.

In order to have the message processed on the thread where the handler was created, you need to call sendMessage
You should change mHandler.handleMessage(elapsedTimeMessage);
with mHandler.sendMessage(elapsedTimeMessage);