Cockroach
打不死的小强,永不crash的Android
使用方式
自定义Application继承自android的Application,并在Application中装载,越早初始化越好,可以在Aplication的onCreate中初始化,当然也可以根据需要在任意地方(不一定要在主线程)装载,在任意地方卸载。可以多次装载和卸载。
例如:
import android.app.Application;
import android.os.Handler;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;
/**
* Created by wanjian on 2017/2/14.
*/
public class App extends Application {
@Override
public void onCreate() {
super.onCreate();
Cockroach.install(new Cockroach.ExceptionHandler() {
// handlerException内部建议手动try{ 你的异常处理逻辑 }catch(Throwable e){ } ,以防handlerException内部再次抛出异常,导致循环调用handlerException
@Override
public void handlerException(final Thread thread, final Throwable throwable) {
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
try {
Log.e("AndroidRuntime","--->CockroachException:"+thread+"<---",throwable);
Toast.makeText(App.this, "Exception Happend\n" + thread + "\n" + throwable.toString(), Toast.LENGTH_SHORT).show();
// throw new RuntimeException("..."+(i++));
} catch (Throwable e) {
}
}
});
}
});
}
}
卸载 Cockroach
Cockroach.uninstall();
测试
装载Cockroach后点击view抛出异常和new Handler中抛出异常
final TextView textView = (TextView) findViewById(R.id.text);
findViewById(R.id.install).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
textView.setText("已安装 Cockroach");
install();
}
});
findViewById(R.id.uninstall).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
textView.setText("已卸载 Cockroach");
Cockroach.uninstall();
}
});
findViewById(R.id.but1).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
throw new RuntimeException("click exception...");
}
});
findViewById(R.id.but2).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new Handler().post(new Runnable() {
@Override
public void run() {
throw new RuntimeException("handler exception...");
}
});
}
});
findViewById(R.id.but3).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new Thread() {
@Override
public void run() {
super.run();
throw new RuntimeException("new thread exception...");
}
}.start();
}
});
findViewById(R.id.but4).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(), SecActivity.class));
}
});
}
private void install() {
Cockroach.install(new Cockroach.ExceptionHandler() {
@Override
public void handlerException(final Thread thread, final Throwable throwable) {
Log.d("Cockroach", "MainThread: " + Looper.getMainLooper().getThread() + " curThread: " + Thread.currentThread());
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
try {
Log.e("AndroidRuntime","--->CockroachException:"+thread+"<---",throwable);
Toast.makeText(getApplicationContext(), "Exception Happend\n" + thread + "\n" + throwable.toString(), Toast.LENGTH_SHORT).show();
// throw new RuntimeException("..."+(i++));
} catch (Throwable e) {
}
}
});
}
});
}
捕获到的堆栈如下,可以看到都已经被 at com.wanjian.cockroach.Cockroach$1.run(Cockroach.java:47)
拦截,APP没有任何影响,没有闪退,也没有重启进程
02-16 09:58:00.660 21199-21199/wj.com.fuck E/AndroidRuntime: --->CockroachException:Thread[main,5,main]<---
java.lang.RuntimeException: click exception...
at wj.com.fuck.MainActivity$3.onClick(MainActivity.java:53)
at android.view.View.performClick(View.java:4909)
at android.view.View$PerformClick.run(View.java:20390)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at com.wanjian.cockroach.Cockroach$1.run(Cockroach.java:47)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5826)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1009)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:804)
02-16 09:58:12.401 21199-21199/wj.com.fuck E/AndroidRuntime: --->CockroachException:Thread[main,5,main]<---
java.lang.RuntimeException: handler exception...
at wj.com.fuck.MainActivity$4$1.run(MainActivity.java:63)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at com.wanjian.cockroach.Cockroach$1.run(Cockroach.java:47)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5826)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1009)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:804)
02-16 09:58:13.241 21199-21199/wj.com.fuck E/AndroidRuntime: --->CockroachException:Thread[Thread-26326,5,main]<---
java.lang.RuntimeException: new thread exception...
at wj.com.fuck.MainActivity$5$1.run(MainActivity.java:76)
当卸载Cockroach
后再在click中抛出异常,日志如下
02-16 09:59:01.251 21199-21199/wj.com.fuck E/AndroidRuntime: FATAL EXCEPTION: main
Process: wj.com.fuck, PID: 21199
java.lang.RuntimeException: click exception...
at wj.com.fuck.MainActivity$3.onClick(MainActivity.java:53)
at android.view.View.performClick(View.java:4909)
at android.view.View$PerformClick.run(View.java:20390)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5826)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1009)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:804)
可以看到 at com.wanjian.cockroach.Cockroach$1.run(Cockroach.java:47)
没有拦截,并且APP crash了。
注意
当主线程或子线程抛出异常时都会调用exceptionHandler.handlerException(Thread thread, Throwable throwable)
exceptionHandler.handlerException可能运行在非UI线程中。
handlerException内部建议手动try{ 你的异常处理逻辑 }catch(Throwable e){ } ,以防handlerException内部再次抛出异常,导致循环调用handlerException
若设置了Thread.setDefaultUncaughtExceptionHandler则可能无法捕获子线程异常。
虽然可以捕获到所有异常,但可能会导致一些莫名其妙的问题,比如view初始化时发生了异常,异常后面的代码得不到执行,虽然不
会导致app crash但view内部已经出现了问题,运行时就会出现很奇葩的现象。再比如activity声明周期方法中抛出了异常,则生
命周期就会不完整,从而导致各种奇葩的现象。
虽然会导致各种奇葩问题发生,但可以最大程度的保证APP正常运行,很多时候我们希望主线程即使抛出异常也不影响app的正常使用,比如我们
给某个view设置背景色时,由于view是null就会导致app crash,像这种问题我们更希望即使view没法设置颜色也不要crash,这
时Cockroach就可以满足你的需求。
handlerException(final Thread thread, final Throwable throwable)内部建议请求自己服务器决定该如何处理该异常,是
直接忽略还是杀死APP又或者其他操作。
Cockroach采用android标准API编写,无依赖,足够轻量,轻量到只有不到100行代码,一般不会存在兼容性问题,也不存在性能上的问题,可以兼容所有android版本。
已上传到jcenter, compile 'com.wanjian:cockroach:0.0.5'
效果视频 http://weibo.com/tv/v/EvM57BR6O?fid=1034:40b2f631632f0cf2a096a09c65db89ad