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碰到程序崩溃时,闪退效果,不会提示"xxx程序异常,退出程序"。这样的效果就要使用到未捕获异常来实现,这里记录了我的一个写法。其实原理很简单,设置程序的未捕获异常监听,实现监听的一个方法,在该方法中现实直接没有提示的退出程序。
捕获异常工具类package com.tdh.http;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.Thread.UncaughtExceptionHandler;
import android.content.Context;
import android.util.Log;
public class OtherExceptionsHandler implements UncaughtExceptionHandler {
private static Context mAppContext; //上下文对象
private static OtherExceptionsHandler instance; //单例引用,这里我们做成单例的,因为我们一个应用程序里面只需要一个UncaughtExceptionHandler实例
private OtherExceptionsHandler(){}
public synchronized static OtherExceptionsHandler getInstance(){ //同步方法,以免单例多线程环境下出现异常
if (instance == null){
instance = new OtherExceptionsHandler();
}
return instance;
}
/**需要上下文对象的初始化*/
public synchronized OtherExceptionsHandler init(Context context){ //初始化,把当前对象设置成UncaughtExceptionHandler处理器
Thread.setDefaultUncaughtExceptionHandler(this);
mAppContext = context.getApplicationContext();
return instance;
}
public synchronized OtherExceptionsHandler init(){ //初始化,把当前对象设置成UncaughtExceptionHandler处理器
Thread.setDefaultUncaughtExceptionHandler(this);
return instance;
}
@Override
public void uncaughtException(Thread thread, Throwable ex) {
if(mAppContext != null){
otherException(thread, ex, mAppContext);
}
otherException(thread, ex);
}
/**
* 处理异常的一般情况
* @param thread
* @param ex
*/
public void otherException(Thread thread, Throwable ex){
StringWriter sw = new StringWriter();
ex.printStackTrace(new PrintWriter(sw, true));
Log.e("uncaughtException", "thread: " + thread
+ " name: " + thread.getName()
+ " id: " + thread.getId()
+ "exception: " + Log.getStackTraceString(ex));
System.exit(0);
}
/**
* 处理异常的特殊情况,一般是需要用到上下文对象context
* @param thread
* @param ex
* @param context
*/
public void otherException(Thread thread, Throwable ex, Context context){
}
}
2.在Application中初始化package com.tdh.http;
import android.app.Application;
public class MyApplication extends Application {
@Override
public void onCreate() {
super.onCreate();
OtherExceptionsHandler.getInstance().init();
}
}
3.在AndroidManifest.xml中配置
android:name="com.tdh.http.MyApplication"
... >
4.在activity中测试findViewById(R.id.button1).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String e = null;
e.getBytes();
}
});
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