异常捕获

第一、首先写线程捕捉异常的Thread.UncaughtExceptionHandler 类
第二、创建MyAppliciton类，要在清单文件中注册Application类 读写权限

捕捉异常的类
package com.example.exceptionhandling.handler;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Environment;
import android.util.Log;

import java.io.File;
import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;

public class UnCatchHandler implements Thread.UncaughtExceptionHandler {
private static UnCatchHandler mUnCatchHandler=new UnCatchHandler();
private Context context;
public static UnCatchHandler getInstance(){
return mUnCatchHandler;
}
public void init(Context context) {
//获取默认的系统异常捕获器
//把当前的crash捕获器设置成默认的crash捕获器
Thread.setDefaultUncaughtExceptionHandler(this);
context = context.getApplicationContext();
}
@Override
public void uncaughtException(Thread t, Throwable e) {
try {
saveSD(e);
} catch (Exception e1) {
e1.printStackTrace();
}
}
//存储sd卡
private void saveSD(Throwable throwable) throws Exception {
if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
Log.i(“dj”, “return”);
return;
}

    //获取手机的一些信息
    PackageManager pm = context.getPackageManager();
    PackageInfo inFo = pm.getPackageInfo(context.getPackageName(), PackageManager.GET_ACTIVITIES);

    //获取版本信息
    String versionName = inFo.versionName;
    int versionCode = inFo.versionCode;

    int version_code = Build.VERSION.SDK_INT;

    //Android版本号
    String release = Build.VERSION.RELEASE;
    //手机型号
    String mobile = Build.MODEL;

    //手机制造商
    String mobileName = Build.MANUFACTURER;

    //存储
    String path = Environment.getExternalStorageDirectory().getAbsolutePath();
    Log.i("dj",path);
   SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy_MM_DD_HH_mm_ss");
    String time = simpleDateFormat.format(new Date());

    File f = new File(path, "exception");
    f.mkdirs();

    File file = new File(f.getAbsolutePath(), "exception" + time + ".txt");

    if (!file.exists()) {
        file.createNewFile();
    }

    String data = "\nMobile型号：" + mobile + "\nMobileName：" + mobileName + "\nSDK版本：" + version_code +
            "\n版本名称：" + versionName + "\n版本号：" + versionCode + "\n异常信息：" + throwable.getMessage();

    Log.i("dj", data);

    byte[] buffer = data.trim().getBytes();
    FileOutputStream fileOutputStream = new FileOutputStream(file);
    // 开始写入数据到这个文件。
    fileOutputStream.write(buffer, 0, buffer.length);
    fileOutputStream.flush();
    fileOutputStream.close();
}

}
MyApplication类中调用Handler类的方法
package com.example.exceptionhandling.applicaiton;

import android.app.Application;

import com.example.exceptionhandling.handler.UnCatchHandler;

public class MyApplication extends Application {
@Override
public void onCreate() {
super.onCreate();
UnCatchHandler.getInstance().init(getApplicationContext());
}
}

package com.example.exceptionhandling;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;

MainActivit中按钮的作用
public class MainActivity extends AppCompatActivity implements View.OnClickListener {

private Button yichang;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    initView();
}

private void initView() {
    yichang = (Button) findViewById(R.id.yichang);
    yichang.setOnClickListener(this);
}

@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.yichang:
                int i=0;
                int j=10;
                int m=j/i;
            break;
    }
}

}