[Android]将应用崩溃信息汇报给开发者并重新启动应用

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：

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：

// fetch Excpetion InfoString 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

package lab.sodino.errorreport;import java.io.File;import android.app.Application;/** * @author Sodino E-mail:[e-mail] * @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

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. */@Overridepublic 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

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:[e-mail] * @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 {@Overridepublic 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 = { "[e-mail]" };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

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:[e-mail] * @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);}@Overridepublic void uncaughtException(Thread thread, Throwable ex) {// fetch Excpetion InfoString 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();}}// printlong 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);// 如果没有NEW_TASK标识且是UI线程抛的异常则界面卡死直到ANRintent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);softApp.startActivity(intent);// write 2 /data/data/<app_package>/files/error.logwrite2ErrorLog(fileErrorLog, info);// kill App Progressandroid.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

<?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

<?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：

<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"

 

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