捕捉全局异常

• 在文件里面注册声明

import android.app.Application;import tes.ray.view.activity.CrashHandler;public class MainApplication extends Application{    @Override    public void onCreate() {        super.onCreate();        CrashHandler crashHandler = CrashHandler.getInstance();        crashHandler.init(this);    }}

一个CrashHandler类

import android.content.Context;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.os.Build;import android.os.Environment;import android.os.Looper;import android.util.Log;import android.widget.Toast;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.PrintWriter;import java.io.StringWriter;import java.io.Writer;import java.lang.reflect.Field;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Map;/** * Created by Lenovo on 2017/10/21. */public class CrashHandler implements Thread.UncaughtExceptionHandler{    private static final String TAG = "CrashHandler";    private Thread.UncaughtExceptionHandler mDefaultHandler;// 系统默认的UncaughtException处理类    private static CrashHandler INSTANCE = new CrashHandler();// CrashHandler实例    private Context mContext;// 程序的Context对象    private Map<String, String> info = new HashMap<String, String>();// 用来存储设备信息和异常信息    private SimpleDateFormat format = new SimpleDateFormat(            "yyyy-MM-dd-HH-mm-ss");// 用于格式化日期,作为日志文件名的一部分    /** 保证只有一个CrashHandler实例 */    private CrashHandler() {    }    /** 获取CrashHandler实例 ,单例模式 */    public static CrashHandler getInstance() {        return INSTANCE;    }    /**     * 初始化     *     * @param context     */    public void init(Context context) {        mContext = context;        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();// 获取系统默认的UncaughtException处理器        Thread.setDefaultUncaughtExceptionHandler(this);// 设置该CrashHandler为程序的默认处理器    }    /**     * 当UncaughtException发生时会转入该重写的方法来处理     */    public void uncaughtException(Thread thread, Throwable ex) {        if (!handleException(ex) && mDefaultHandler != null) {            // 如果自定义的没有处理则让系统默认的异常处理器来处理            mDefaultHandler.uncaughtException(thread, ex);        } else {            try {                Thread.sleep(3000);// 如果处理了，让程序继续运行3秒再退出，保证文件保存并上传到服务器            } catch (InterruptedException e) {                e.printStackTrace();            }            // 退出程序            android.os.Process.killProcess(android.os.Process.myPid());            System.exit(1);        }    }    /**     * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.     *     * @param ex     *            异常信息     * @return true 如果处理了该异常信息;否则返回false.     */    public boolean handleException(Throwable ex) {        if (ex == null)            return false;        new Thread() {            public void run() {                Looper.prepare();                Toast.makeText(mContext, "出现闪退了正在把日志保存到sdcard crash目录下",Toast.LENGTH_LONG).show();                Looper.loop();            }        }.start();        // 收集设备参数信息        collectDeviceInfo(mContext);        // 保存日志文件        saveCrashInfo2File(ex);        return true;    }    /**     * 收集设备参数信息     *     * @param context     */    public void collectDeviceInfo(Context context) {        try {            PackageManager pm = context.getPackageManager();// 获得包管理器            PackageInfo pi = null;// 得到该应用的信息，即主Activity            try {                pi = pm.getPackageInfo(context.getPackageName(),                        PackageManager.GET_ACTIVITIES);            } catch (PackageManager.NameNotFoundException e) {                e.printStackTrace();            }            if (pi != null) {                String versionName = pi.versionName == null ? "null"                        : pi.versionName;                String versionCode = pi.versionCode + "";                info.put("versionName", versionName);                info.put("versionCode", versionCode);            }        } catch (Exception e) {            e.printStackTrace();        }        Field[] fields = Build.class.getDeclaredFields();// 反射机制        for (Field field : fields) {            try {                field.setAccessible(true);                info.put(field.getName(), field.get("").toString());                Log.d(TAG, field.getName() + ":" + field.get(""));            } catch (IllegalArgumentException e) {                e.printStackTrace();            } catch (IllegalAccessException e) {                e.printStackTrace();            }        }    }    private String saveCrashInfo2File(Throwable ex) {        StringBuffer sb = new StringBuffer();        for (Map.Entry<String, String> entry : info.entrySet()) {            String key = entry.getKey();            String value = entry.getValue();            sb.append(key + "=" + value + "\r\n");        }        Writer writer = new StringWriter();        PrintWriter pw = new PrintWriter(writer);        ex.printStackTrace(pw);        Throwable cause = ex.getCause();        // 循环着把所有的异常信息写入writer中        while (cause != null) {            cause.printStackTrace(pw);            cause = cause.getCause();        }        pw.close();// 记得关闭        String result = writer.toString();        sb.append(result);        // 保存文件        long timetamp = System.currentTimeMillis();        String time = format.format(new Date());        String fileName = "crash-" + time + "-" + timetamp + ".log";        if (Environment.getExternalStorageState().equals(                Environment.MEDIA_MOUNTED)) {            try {                File dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath() +  File.separator + "crash");                Log.i("CrashHandler", dir.toString());                if (!dir.exists())                    dir.mkdir();                FileOutputStream fos = new FileOutputStream(new File(dir, fileName));                fos.write(sb.toString().getBytes());                fos.close();                return fileName;            } catch (FileNotFoundException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            }        }        return null;    }}

主方法里面的监听事件

btn_start = (Button) findViewById(R.id.but_home);

btn_start.setOnClickListener(new View.OnClickListener() {

@Override

publicvoid onClick(View view) {

data();

}

privatevoid data() {

TextView texview=null;

texview.setText("dsd");

}

});