android处理unchecked exception

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使用Android提供的Thread.UncaughtExceptionHandler类，可以捕获系统的unchecked exception,并提供相应的错误处理操作，增加程序的健壮性。
一个简单的示例：

public class CrashHandle implements Thread.UncaughtExceptionHandler {    private static CrashHandle Instance = new CrashHandle();    private Context context;    private Thread.UncaughtExceptionHandler DefeaultHandler;    private CrashHandle(){}    //单例模式    public static CrashHandle getInstance(){        return Instance;    }    public void init(Context context){        this.context = context;        DefeaultHandler = Thread.getDefaultUncaughtExceptionHandler();        Thread.setDefaultUncaughtExceptionHandler(this);    }    @Override    public void uncaughtException(Thread thread, Throwable ex) {        // TODO Auto-generated method stub        if((!HandlerException(ex)) && (this.DefeaultHandler != null)){            this.DefeaultHandler.uncaughtException(thread, ex);        }else{            try {                Thread.sleep(3000);            } catch (InterruptedException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }            Process.killProcess(Process.myPid());            System.exit(1);        }    }    //自定义错误处理，收集错误信息与发送错误信息    public boolean HandlerException(Throwable ex){        if(ex == null){            return false;        }        new Thread(){            public void run(){                Looper.prepare();                Toast.makeText(context, "程序崩溃了，即将退出", 0).show();                Looper.loop();            }        }.start();        return true;    }}

因为Android程序的入口是application，为了使用该方法，我们需要继承Android的application类，在oncreat()方法初始化改类。

public class MyApplication extends Application{    private static  MyApplication myApplication;    public void onCreate(){        super.onCreate();        CrashHandle crash = CrashHandle.getInstance();        crash.init(getApplicationContext());    }    public static MyApplication getMyApplication(){        if(myApplication == null){            myApplication = new MyApplication();        }        return myApplication;    }}

最后，在manifest里完成注册：

<application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme"         android:name="com.zl.crash.MyApplication"/>

在mainactivity里制造一个unchecked exception，会看到如下效果：

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