Android UncaughtExceptionHandler

Android UncaughtExceptionHandler

Implemented by objects that want to handle cases where a thread is being terminated by an uncaught exception. Upon such termination, the handler is notified of the terminating thread and causal exception. If there is no explicit handler set then the thread's group is the default handler. 

Below i wrote the code user can send some bug report to Developer when application crashed.

Activity Code

-->

import android.app.Activity;

import android.os.Bundle;

import android.widget.TextView;

import android.widget.ViewFlipper;

/**

*

* @author vijayakumar

*

*/

public class AndroidMADQAActivity extends Activity {

ViewFlipper flipper;

TextView textView = null;

Throwable throwable;

UnCaughtException un = null;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

Thread.setDefaultUncaughtExceptionHandler(new UnCaughtException(AndroidMADQAActivity.this));

Integer[] items = { R.drawable.a, R.drawable.e,R.drawable.d,R.drawable.c};

setContentView(R.layout.main);

textView.setText("Helloo Error Welcome");

}

}

Screen Shot

User Got Alert When Application Crashed!

When User click Report Button

Developer Got Bug Report In EMail

 UnCaughtException.Class

-->

package com.madqa;

import java.io.File;

import java.io.PrintWriter;

import java.io.StringWriter;

import java.io.Writer;

import java.lang.Thread.UncaughtExceptionHandler;

import java.util.Date;

import java.util.Locale;

import android.app.AlertDialog;

import android.content.Context;

import android.content.DialogInterface;

import android.content.Intent;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.net.Uri;

import android.os.Environment;

import android.os.Looper;

import android.os.StatFs;

import android.util.Log;

/**

* {@link UncaughtExceptionHandler} send an e-mail with

* some debug information to the developer.

*

* @author VIJAYAKUMAR

*/

public class UnCaughtException implements UncaughtExceptionHandler {

private static final String RECIPIENT = "iamvijayakumar@gmail.com";

private Thread.UncaughtExceptionHandler previousHandler;

private Context context;

private static Context context1;

public UnCaughtException(Context ctx) {

context = ctx;

context1 = ctx;

}

private StatFs getStatFs() {

File path = Environment.getDataDirectory();

return new StatFs(path.getPath());

}

private long getAvailableInternalMemorySize(StatFs stat) {

long blockSize = stat.getBlockSize();

long availableBlocks = stat.getAvailableBlocks();

return availableBlocks * blockSize;

}

private long getTotalInternalMemorySize(StatFs stat) {

long blockSize = stat.getBlockSize();

long totalBlocks = stat.getBlockCount();

return totalBlocks * blockSize;

}

private void addInformation(StringBuilder message) {

message.append("Locale: ").append(Locale.getDefault()).append('\n');

try {

PackageManager pm = context.getPackageManager();

PackageInfo pi;

pi = pm.getPackageInfo(context.getPackageName(), 0);

message.append("Version: ").append(pi.versionName).append('\n');

message.append("Package: ").append(pi.packageName).append('\n');

} catch (Exception e) {

Log.e("CustomExceptionHandler", "Error", e);

message.append("Could not get Version information for ").append(

context.getPackageName());

}

message.append("Phone Model: ").append(android.os.Build.MODEL).append(

'\n');

message.append("Android Version: ").append(

android.os.Build.VERSION.RELEASE).append('\n');

message.append("Board: ").append(android.os.Build.BOARD).append('\n');

message.append("Brand: ").append(android.os.Build.BRAND).append('\n');

message.append("Device: ").append(android.os.Build.DEVICE).append('\n');

message.append("Host: ").append(android.os.Build.HOST).append('\n');

message.append("ID: ").append(android.os.Build.ID).append('\n');

message.append("Model: ").append(android.os.Build.MODEL).append('\n');

message.append("Product: ").append(android.os.Build.PRODUCT).append(

'\n');

message.append("Type: ").append(android.os.Build.TYPE).append('\n');

StatFs stat = getStatFs();

message.append("Total Internal memory: ").append(

getTotalInternalMemorySize(stat)).append('\n');

message.append("Available Internal memory: ").append(

getAvailableInternalMemorySize(stat)).append('\n');

}

public void uncaughtException(Thread t, Throwable e) {

try {

StringBuilder report = new StringBuilder();

Date curDate = new Date();

report.append("Error Report collected on : ").append(curDate.toString()).append('\n').append('\n');

report.append("Informations :").append('\n');

addInformation(report);

report.append('\n').append('\n');

report.append("Stack:\n");

final Writer result = new StringWriter();

final PrintWriter printWriter = new PrintWriter(result);

e.printStackTrace(printWriter);

report.append(result.toString());

printWriter.close();

report.append('\n');

report.append("**** End of current Report ***");

Log.e(UnCaughtException.class.getName(),

"Error while sendErrorMail"+report);

sendErrorMail(report);

} catch (Throwable ignore) {

Log.e(UnCaughtException.class.getName(),

"Error while sending error e-mail", ignore);

}

// previousHandler.uncaughtException(t, e);

}

/**

* This method for call alert dialog when application crashed!

* @author vijayakumar

*/

public void sendErrorMail(final StringBuilder errorContent) {

final AlertDialog.Builder builder= new AlertDialog.Builder(context);

new Thread(){

@Override

public void run() {

Looper.prepare();

builder.setTitle("Sorry...!");

builder.create();

builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

System.exit(0);

}

});

builder.setPositiveButton("Report", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

Intent sendIntent = new Intent(Intent.ACTION_SEND);

String subject = "Your App crashed! Fix it!";

StringBuilder body = new StringBuilder("Yoddle");

body.append('\n').append('\n');

body.append(errorContent).append('\n').append('\n');

// sendIntent.setType("text/plain");

sendIntent.setType("message/rfc822");

sendIntent.putExtra(Intent.EXTRA_EMAIL, new String[] { RECIPIENT });

sendIntent.putExtra(Intent.EXTRA_TEXT, body.toString());

sendIntent.putExtra(Intent.EXTRA_SUBJECT, subject);

sendIntent.setType("message/rfc822");

// context.startActivity(Intent.createChooser(sendIntent, "Error Report"));

context1.startActivity(sendIntent);

System.exit(0);

}

});

builder.setMessage("Unfortunately,This application has stopped");

builder.show();

Looper.loop();

}

}.start();

}

}

Download Source Code