Cockroach 2.0
Cockroach 2.0新特性
- Cockroach 2.0减少了Cockroach 1.0版本中Activity生命周期中抛出异常黑屏的问题。
- Cockroach 1.0未雨绸缪,提前做好准备,等待异常到来。Cockroach 2.0马后炮,只有当抛出异常时才去拯救。
- Cockroach 2.0试图在APP即将崩溃时尽量去挽救,不至于情况更糟糕。
用一张图片来形容就是
特别注意: 当view的measure,layout,draw,以及recyclerview的bindviewholder 方法抛出异常时会导致 viewrootimpl挂掉,此时会回调 onMayBeBlackScreen 方法,建议直接杀死app。以后的版本会只 finish掉viewrootimpl挂掉的Activity而不是直接杀死app
使用姿势
- 必须要在Application初始化时装载
例如:
package com.wanjian.demo;
import android.app.Application;
import android.os.Handler;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;
import com.wanjian.cockroach.Cockroach;
/**
* Created by wanjian on 2018/5/19.
*/
public class App extends Application {
@Override
public void onCreate() {
super.onCreate();
install();
}
private void install() {
Cockroach.install(new ExceptionHandler() {
@Override
protected void onUncaughtExceptionHappened(Thread thread, Throwable throwable) {
Log.e("AndroidRuntime", "--->onUncaughtExceptionHappened:" + thread + "<---", throwable);
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
toast.setText(R.string.safe_mode_excep_tips);
toast.show();
}
});
}
@Override
protected void onBandageExceptionHappened(Throwable throwable) {
throwable.printStackTrace();//打印警告级别log,该throwable可能是最开始的bug导致的,无需关心
toast.setText("Cockroach Worked");
toast.show();
}
@Override
protected void onEnterSafeMode() {
int tips = R.string.safe_mode_tips;
Toast.makeText(App.this, getResources().getString(tips), Toast.LENGTH_LONG).show();
}
@Override
protected void onMayBeBlackScreen(Throwable e) {
Thread thread = Looper.getMainLooper().getThread();
Log.e("AndroidRuntime", "--->onUncaughtExceptionHappened:" + thread + "<---", e);
//黑屏时建议直接杀死app
sysExcepHandler.uncaughtException(thread, new RuntimeException("black screen"));
}
});
}
}
原理分析
cockroach2.0通过替换ActivityThread.mH.mCallback
,实现拦截Activity生命周期,
通过调用ActivityManager的finishActivity
结束掉生命周期抛出异常的Activity
相关视频 http://weibo.com/tv/v/EvM57BR6O?fid=1034:40b2f631632f0cf2a096a09c65db89ad
https://github.com/android-notes/Cockroach/blob/master/cockroach.mp4?raw=true