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);     } }