全局捕获异常

import android.content.Context;
import android.os.Environment;
import android.os.Process;
import android.util.Log;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

/**
 * 这个就是用来捕获项目的所有异常监听
 */
public class MyUncaughtException implements Thread.UncaughtExceptionHandler {
    private static Context mContext;

    private MyUncaughtException() {
    }

    private static class HolderUncaugh {
        private static final MyUncaughtException uncaught = new MyUncaughtException();
    }

    public static MyUncaughtException getInstance(Context context) {
        mContext = context;
        return HolderUncaugh.uncaught;
    }

    //有异常了
    @Override
    public void uncaughtException(Thread t, Throwable e) {
        Log.e("异常", e.getMessage());

        File file = new File(Environment.getExternalStorageDirectory() + "/a.txt");
        if (!file.exists()) {
            try {
                file.createNewFile();
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        }
//        PrintWriter pw = new PrintWriter(file)
        try {
            FileWriter fw = new FileWriter(file);
            fw.write(e.getMessage());
            fw.flush();
            fw.close();
        } catch (IOException e1) {
            e1.printStackTrace();
        }


        //杀死当前进程
        Process.killProcess(Process.myPid());

        //推出当前程序
        //System.exit(1);
    }
}


//记得在Application进行注册

import android.app.Application;

/**
 * 一个项目里面有多少个Context
 * Activity的个数+Service个数+ 1（application）
 * Application代表整个项目的上下文对象
 */
public class MyApplication extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        //首先获取这个对象
        MyUncaughtException instance = MyUncaughtException.getInstance(this);
        //开始监听
        Thread.setDefaultUncaughtExceptionHandler(instance);
    }
}