【Android项目】程序意外Crash后自动重启

本文主要是关于如何避免Android项目中的程序Bug导致的突然退出，从而使用户体验不好；

注解：关于本博客也是从项目中总结，同时加上网上查询所得，自己手动测试过，可用！

一、项目结构如下：



二、CatchExcApplication主要继承Application，同时需要在清单文件中注册：

package com.jason.crashhandler;

import java.util.ArrayList;

import android.app.Activity;
import android.app.Application;

public class CatchExcApplication extends Application {

ArrayList<Activity> list = new ArrayList<Activity>();

public void init(){
//设置该CrashHandler为程序的默认处理器
UnCeHandler catchExcep = new UnCeHandler(this);
Thread.setDefaultUncaughtExceptionHandler(catchExcep);
}

/**
* Activity关闭时，删除Activity列表中的Activity对象*/
public void removeActivity(Activity a){
list.remove(a);
}

/**
* 向Activity列表中添加Activity对象*/
public void addActivity(Activity a){
list.add(a);
}

/**
* 关闭Activity列表中的所有Activity*/
public void finishActivity(){
for (Activity activity : list) {
if (null != activity) {
activity.finish();
}
}
//杀死该应用进程
android.os.Process.killProcess(android.os.Process.myPid());
}
}



三、UnCeHandler需要继承UncaughtExceptionHandler；
package com.jason.crashhandler;

import java.lang.Thread.UncaughtExceptionHandler;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;

public class UnCeHandler implements UncaughtExceptionHandler {

private Thread.UncaughtExceptionHandler mDefaultHandler;
public final String TAG = "CatchExcep";
CatchExcApplication application;

public UnCeHandler(CatchExcApplication application) {
// 获取系统默认的UncaughtException处理器
mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
this.application = application;
}

@Override
public void uncaughtException(Thread thread, Throwable ex) {
if (!handleException(ex) && mDefaultHandler != null) {
// 如果用户没有处理则让系统默认的异常处理器来处理
mDefaultHandler.uncaughtException(thread, ex);
} else {
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
Log.e(TAG, "error : ", e);
}
Intent intent = new Intent(application.getApplicationContext(),MainActivity.class);
PendingIntent restartIntent = PendingIntent.getActivity(
application.getApplicationContext(), 0, intent,
Intent.FLAG_ACTIVITY_NEW_TASK);
// 退出程序
AlarmManager mgr = (AlarmManager) application.getSystemService(Context.ALARM_SERVICE);
mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 1000,restartIntent); // 1秒钟后重启应用
application.finishActivity();
}
}

/**
* 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.
*
* @param ex
* @return true:如果处理了该异常信息;否则返回false.
*/
private boolean handleException(Throwable ex) {
if (ex == null) {
return false;
}
// 使用Toast来显示异常信息
new Thread() {
@Override
public void run() {
Looper.prepare();
Toast.makeText(application.getApplicationContext(),"很抱歉,程序出现异常,即将退出.", Toast.LENGTH_SHORT).show();
Looper.loop();
}
}.start();
return true;
}

}


四、此Activity中的测试代码；
package com.jason.crashhandler;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity {

private CatchExcApplication app;
TextView mText;
Button mButton;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

mText = (TextView) findViewById(R.id.txt_test);
mButton = (Button) findViewById(R.id.btn_test);

app = (CatchExcApplication) getApplication();
app.init();
app.addActivity(this);

mButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
pressDown();
}
});

}

/**
* 人为制造的异常*/
public void pressDown(){
new Thread(new Runnable() {
@Override
public void run() {
mText.setText("what's the fuck !");
}
}).start();
}

}