[Android]将应用崩溃信息汇报给开发者并重新启动应用

/article/2637277.html

在开发过程中，虽然经过测试，但在发布后，在广大用户各种各样的运行环境和操作下，可能会发生一些异想不到的错误导致程序崩溃。将这些错误信息收集起来并反馈给开发者，对于开发者改进优化程序是相当重要的。好了，下面就来实现这种功能吧。

(更正：2012年2月9日18时42分07秒)

由于为历史帖原因，以下做法比较浪费，但抓取异常的效果是一样的。

1.对于UI线程(即Android中的主线程)抛出的未捕获异常，将这些异常信息存储起来然后关闭到整个应用程序。并再次启动程序，则进入崩溃信息反馈界面让用户将出错信息以Email的形式发送给开发者。

2.对于非UI线程抛出的异常，则立即唤醒崩溃信息反馈界面提示用户将出错信息发送Email。

效果图如下[CSDN]：



过程了解了，则需要了解的几个知识点如下：

1.拦截UncaughtException

Application.onCreate()是整个Android应用的入口方法。在该方法中执行如下代码即可拦截UncaughtException：

[java] view
plaincopy

ueHandler = new UEHandler(this);

// 设置异常处理实例

Thread.setDefaultUncaughtExceptionHandler(ueHandler);



2.抓取导致程序崩溃的异常信息

UEHandler是Thread.UncaughtExceptionHandler的实现类，在其public void uncaughtException(Thread thread, Throwable ex)的实现中可以获取崩溃信息，代码如下：

[java] view
plaincopy

// fetch Excpetion Info

String info = null;

ByteArrayOutputStream baos = null;

PrintStream printStream = null;

try {

baos = new ByteArrayOutputStream();

printStream = new PrintStream(baos);

ex.printStackTrace(printStream);

byte[] data = baos.toByteArray();

info = new String(data);

data = null;

} catch (Exception e) {

e.printStackTrace();

} finally {

try {

if (printStream != null) {

printStream.close();

}

if (baos != null) {

baos.close();

}

} catch (Exception e) {

e.printStackTrace();

}

}



3.程序抛异常后，要关闭整个应用

悲催的程序员，唉，以下三种方式都无效了，咋办啊！！！

3.1android.os.Process.killProcess(android.os.Process.myPid());

3.2ActivityManager am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);

am.restartPackage("lab.sodino.errorreport");

3.3System.exit(0)



好吧，毛主席告诉我们：自己动手丰衣足食。

SoftApplication中声明一个变量need2Exit，其值为true标识当前的程序需要完整退出;为false时该干嘛干嘛去。该变量在应用的启动Activity.onCreate()处赋值为false。

在捕获了崩溃信息后，调用SoftApplication.setNeed2Exit(true)标识程序需要退出，并finish()掉ActErrorReport，这时ActErrorReport退栈，抛错的ActOccurError占据手机屏幕，根据Activity的生命周期其要调用onStart()，则我们在onStart()处读取need2Exit的状态，若为true，则也关闭到当前的Activity，则退出了整个应用了。此方法可以解决一次性退出已开启了多个Activity的Application。详细代码请阅读下面的示例源码。



好了，代码如下：

lab.sodino.errorreport.SoftApplication.java

[java] view
plaincopy

package lab.sodino.errorreport;

import java.io.File;

import android.app.Application;

/**

* @author Sodino E-mail:sodinoopen@hotmail.com

* @version Time：2011-6-9 下午11:49:56

*/

public class SoftApplication extends Application {

/** "/data/data/<app_package>/files/error.log" */

public static final String PATH_ERROR_LOG = File.separator + "data" + File.separator + "data"

+ File.separator + "lab.sodino.errorreport" + File.separator + "files" + File.separator

+ "error.log";

/** 标识是否需要退出。为true时表示当前的Activity要执行finish()。 */

private boolean need2Exit;

/** 异常处理类。 */

private UEHandler ueHandler;

public void onCreate() {

need2Exit = false;

ueHandler = new UEHandler(this);

// 设置异常处理实例

Thread.setDefaultUncaughtExceptionHandler(ueHandler);

}

public void setNeed2Exit(boolean bool) {

need2Exit = bool;

}

public boolean need2Exit() {

return need2Exit;

}

}

lab.sodino.errorreport.ActOccurError.java

[b][java] view
plaincopy[/b]

package lab.sodino.errorreport;

import java.io.File;

import java.io.FileInputStream;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.widget.Button;

public class ActOccurError extends Activity {

private SoftApplication softApplication;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

softApplication = (SoftApplication) getApplication();

// 一开始进入程序恢复为"need2Exit=false"。

softApplication.setNeed2Exit(false);

Log.d("ANDROID_LAB", "ActOccurError.onCreate()");

Button btnMain = (Button) findViewById(R.id.btnThrowMain);

btnMain.setOnClickListener(new Button.OnClickListener() {

public void onClick(View v) {

Log.d("ANDROID_LAB", "Thread.main.run()");

int i = 0;

i = 100 / i;

}

});

Button btnChild = (Button) findViewById(R.id.btnThrowChild);

btnChild.setOnClickListener(new Button.OnClickListener() {

public void onClick(View v) {

new Thread() {

public void run() {

Log.d("ANDROID_LAB", "Thread.child.run()");

int i = 0;

i = 100 / i;

}

}.start();

}

});

// 处理记录于error.log中的异常

String errorContent = getErrorLog();

if (errorContent != null) {

Intent intent = new Intent(this, ActErrorReport.class);

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

intent.putExtra("error", errorContent);

intent.putExtra("by", "error.log");

startActivity(intent);

}

}

public void onStart() {

super.onStart();

if (softApplication.need2Exit()) {

Log.d("ANDROID_LAB", "ActOccurError.finish()");

ActOccurError.this.finish();

} else {

// do normal things

}

}

/**

* 读取是否有未处理的报错信息。<br/>

* 每次读取后都会将error.log清空。<br/>

*

* @return 返回未处理的报错信息或null。

*/

private String getErrorLog() {

File fileErrorLog = new File(SoftApplication.PATH_ERROR_LOG);

String content = null;

FileInputStream fis = null;

try {

if (fileErrorLog.exists()) {

byte[] data = new byte[(int) fileErrorLog.length()];

fis = new FileInputStream(fileErrorLog);

fis.read(data);

content = new String(data);

data = null;

}

} catch (Exception e) {

e.printStackTrace();

} finally {

try {

if (fis != null) {

fis.close();

}

if (fileErrorLog.exists()) {

fileErrorLog.delete();

}

} catch (Exception e) {

e.printStackTrace();

}

}

return content;

}

}

lab.sodino.errorreport.ActErrorReport.java

[b][java] view
plaincopy[/b]

package lab.sodino.errorreport;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

/**

* @author Sodino E-mail:sodinoopen@hotmail.com

* @version Time：2011-6-12 下午01:34:17

*/

public class ActErrorReport extends Activity {

private SoftApplication softApplication;

private String info;

/** 标识来处。 */

private String by;

private Button btnReport;

private Button btnCancel;

private BtnListener btnListener;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.report);

softApplication = (SoftApplication) getApplication();

by = getIntent().getStringExtra("by");

info = getIntent().getStringExtra("error");

TextView txtHint = (TextView) findViewById(R.id.txtErrorHint);

txtHint.setText(getErrorHint(by));

EditText editError = (EditText) findViewById(R.id.editErrorContent);

editError.setText(info);

btnListener = new BtnListener();

btnReport = (Button) findViewById(R.id.btnREPORT);

btnCancel = (Button) findViewById(R.id.btnCANCEL);

btnReport.setOnClickListener(btnListener);

btnCancel.setOnClickListener(btnListener);

}

private String getErrorHint(String by) {

String hint = "";

String append = "";

if ("uehandler".equals(by)) {

append = " when the app running";

} else if ("error.log".equals(by)) {

append = " when last time the app running";

}

hint = String.format(getResources().getString(R.string.errorHint), append, 1);

return hint;

}

public void onStart() {

super.onStart();

if (softApplication.need2Exit()) {

// 上一个退栈的Activity有执行“退出”的操作。

Log.d("ANDROID_LAB", "ActErrorReport.finish()");

ActErrorReport.this.finish();

} else {

// go ahead normally

}

}

class BtnListener implements Button.OnClickListener {

@Override

public void onClick(View v) {

if (v == btnReport) {

// 需要 android.permission.SEND权限

Intent mailIntent = new Intent(Intent.ACTION_SEND);

mailIntent.setType("plain/text");

String[] arrReceiver = { "sodinoopen@hotmail.com" };

String mailSubject = "App Error Info[" + getPackageName() + "]";

String mailBody = info;

mailIntent.putExtra(Intent.EXTRA_EMAIL, arrReceiver);

mailIntent.putExtra(Intent.EXTRA_SUBJECT, mailSubject);

mailIntent.putExtra(Intent.EXTRA_TEXT, mailBody);

startActivity(Intent.createChooser(mailIntent, "Mail Sending..."));

ActErrorReport.this.finish();

} else if (v == btnCancel) {

ActErrorReport.this.finish();

}

}

}

public void finish() {

super.finish();

if ("error.log".equals(by)) {

// do nothing

} else if ("uehandler".equals(by)) {

// 1.

// android.os.Process.killProcess(android.os.Process.myPid());

// 2.

// ActivityManager am = (ActivityManager)

// getSystemService(ACTIVITY_SERVICE);

// am.restartPackage("lab.sodino.errorreport");

// 3.

// System.exit(0);

// 1.2.3.都失效了，Google你让悲催的程序员情何以堪啊。

softApplication.setNeed2Exit(true);

// ////////////////////////////////////////////////////

// // 另一个替换方案是直接返回“HOME”

// Intent i = new Intent(Intent.ACTION_MAIN);

// // 如果是服务里调用，必须加入newtask标识

// i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

// i.addCategory(Intent.CATEGORY_HOME);

// startActivity(i);

// ////////////////////////////////////////////////////

}

}

}

lab.sodino.errorreport.UEHandler.java

[java] view
plaincopy

package lab.sodino.uncaughtexception;



import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.PrintStream;

import android.content.Intent;

import android.util.Log;



/**

* @author Sodino E-mail:sodinoopen@hotmail.com

* @version Time：2011-6-9 下午11:50:43

*/

public class UEHandler implements Thread.UncaughtExceptionHandler {

private SoftApplication softApp;

private File fileErrorLog;



public UEHandler(SoftApplication app) {

softApp = app;

fileErrorLog = new File(SoftApplication.PATH_ERROR_LOG);

}



@Override

public void uncaughtException(Thread thread, Throwable ex) {

// fetch Excpetion Info

String info = null;

ByteArrayOutputStream baos = null;

PrintStream printStream = null;

try {

baos = new ByteArrayOutputStream();

printStream = new PrintStream(baos);

ex.printStackTrace(printStream);

byte[] data = baos.toByteArray();

info = new String(data);

data = null;

} catch (Exception e) {

e.printStackTrace();

} finally {

try {

if (printStream != null) {

printStream.close();

}

if (baos != null) {

baos.close();

}

} catch (Exception e) {

e.printStackTrace();

}

}

// print

long threadId = thread.getId();

Log.d("ANDROID_LAB", "Thread.getName()=" + thread.getName() + " id=" + threadId + " state=" + thread.getState());

Log.d("ANDROID_LAB", "Error[" + info + "]");

if (threadId != 1) {

// 此处示例跳转到汇报异常界面。

Intent intent = new Intent(softApp, ActErrorReport.class);

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

intent.putExtra("error", info);

intent.putExtra("by", "uehandler");

softApp.startActivity(intent);

} else {

// 此处示例发生异常后，重新启动应用

Intent intent = new Intent(softApp, ActOccurError.class);

// 如果<span style="background-color: rgb(255, 255, 255); ">没有NEW_TASK标识且</span>是UI线程抛的异常则界面卡死直到ANR

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

softApp.startActivity(intent);

// write 2 /data/data/<app_package>/files/error.log

write2ErrorLog(fileErrorLog, info);

// kill App Progress

android.os.Process.killProcess(android.os.Process.myPid());

}

}



private void write2ErrorLog(File file, String content) {

FileOutputStream fos = null;

try {

if (file.exists()) {

// 清空之前的记录

file.delete();

} else {

file.getParentFile().mkdirs();

}

file.createNewFile();

fos = new FileOutputStream(file);

fos.write(content.getBytes());

} catch (Exception e) {

e.printStackTrace();

} finally {

try {

if (fos != null) {

fos.close();

}

} catch (Exception e) {

e.printStackTrace();

}

}

}

}



/res/layout/main.xml

[b][xhtml] view
plaincopy[/b]

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello"

/>

<Button android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="Throws Exception By Main Thread"

android:id="@+id/btnThrowMain"

></Button>

<Button android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="Throws Exception By Child Thread"

android:id="@+id/btnThrowChild"

></Button>

</LinearLayout>

/res/layout/report.xml

[b][xhtml] view
plaincopy[/b]

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical" android:layout_width="fill_parent"

android:layout_height="fill_parent">

<TextView android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/errorHint"

android:id="@+id/txtErrorHint" />

<EditText android:layout_width="fill_parent"

android:layout_height="wrap_content" android:id="@+id/editErrorContent"

android:editable="false" android:layout_weight="1"></EditText>

<LinearLayout android:layout_width="fill_parent"

android:layout_height="wrap_content" android:background="#96cdcd"

android:gravity="center" android:orientation="horizontal">

<Button android:layout_width="fill_parent"

android:layout_height="wrap_content" android:text="Report"

android:id="@+id/btnREPORT" android:layout_weight="1"></Button>

<Button android:layout_width="fill_parent"

android:layout_height="wrap_content" android:text="Cancel"

android:id="@+id/btnCANCEL" android:layout_weight="1"></Button>

</LinearLayout>

</LinearLayout>



用到的string.xml资源为：

[b][xhtml] view
plaincopy[/b]

<string name="errorHint">A error has happened %1$s.Please click <i><b>"REPORT"</b></i> to send the error information to us by email, Thanks!!!</string>

重要的一点是要在AndroidManifest.xml中对<application>节点设置android:name=".SoftApplication"