android crash存储位置,Android Crash 全局捕获

Android Crash 全局捕获

首先应该明白的一点是,Android在崩溃后会重新启动崩溃时的那个Activity,如果你的Activity在初始化的时候就直接崩溃,那么你将连续得到 Crash 崩溃日志.这个说出来可能没什么,可怜的我在看到崩溃日志时活脱脱的以为 uncaughtException(Thread thread, Throwable ex) 方法被调用了两次.知道原因后就很好解决,在崩溃时把 Activity 栈清空就可以.

1. UncaughtExceptionHandler

这是一个接口,只有一个方法 uncaughtException(Thread t, Throwable e) 而且注释已经说明,这个方法是虚拟机(JVM)去调用.所以我们编写一个类实现此接口就可以了.

public interface UncaughtExceptionHandler {

/**

* Method invoked when the given thread terminates due to the

* given uncaught exception.

*

Any exception thrown by this method will be ignored by the

* Java Virtual Machine.

* @param t the thread

* @param e the exception

*/

void uncaughtException(Thread t, Throwable e);

}

2. 异常时的常规处理

1. 显示崩溃前的Toast

2. 保存崩溃日志信息到sd卡

3. 重启APP

实际项目中,我们需要做好这三件事.

/**

* 异常发生时，系统回调的函数，我们在这里处理一些操作

*/

@Override

public void uncaughtException(Thread thread, Throwable ex) {

showCrashToast();//展示崩溃前的Toast

saveCrashReport2SD(mContext, ex);//保存崩溃信息到sdcard

restartApp();//重新启动APP

}

3. 完整的代码

需要注意的地方写在注释里了.

public class CrashHandler implements UncaughtExceptionHandler {

private static final String TAG = "CrashHandler";

private Context mContext;

private static CrashHandler mInstance = new CrashHandler();

private CrashHandler() {

}

/**

* 单例模式，保证只有一个CrashHandler实例存在

*

* @return

*/

public static CrashHandler getInstance() {

return mInstance;

}

/**

* 异常发生时，系统回调的函数，我们在这里处理一些操作

*/

@Override

public void uncaughtException(Thread thread, Throwable ex) {

showCrashToast();

saveCrashReport2SD(mContext, ex);

restartApp();

}

/**

* 为我们的应用程序设置自定义Crash处理

*/

public void initCrashHandler(Context context) {

mContext = context;

Thread.setDefaultUncaughtExceptionHandler(this);

}

private void restartApp() {

Intent intent = new Intent(App.getInstance().getApplicationContext(),

InitAdvsMultiActivity.class);

intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK);

PendingIntent restartIntent = PendingIntent.getActivity(App.getInstance()

.getApplicationContext(), 0, intent, PendingIntent.FLAG_ONE_SHOT);

//重启应用

AlarmManager mgr = (AlarmManager) App.getInstance().getSystemService(Context.ALARM_SERVICE);

mgr.set(AlarmManager.RTC, System.currentTimeMillis(), restartIntent);

//清空Activity栈,防止系统自动重启至崩溃页面,导致崩溃再次出现.

ActivityLifeManager.getInstance().finishAllActivity();

//退出程序

android.os.Process.killProcess(android.os.Process.myPid());

System.exit(0);

System.gc();

}

private void showCrashToast() {

new Thread() {

@Override

public void run() {

Looper.prepare();

Toast.makeText(App.getInstance().getApplicationContext(), "很抱歉,程序出现异常,即将重启",

Toast.LENGTH_LONG).show();

Looper.loop();

}

}.start();

try {

Thread.sleep(1000);//Toast展示的时间

} catch (InterruptedException e) {

}

}

/**

* 获取一些简单的信息,软件版本，手机版本，型号等信息存放在LinkedHashMap中

*

* @param context

* @return

*/

private HashMap obtainSimpleInfo(Context context) {

LinkedHashMap map = new LinkedHashMap();

PackageManager mPackageManager = context.getPackageManager();

PackageInfo mPackageInfo = null;

try {

mPackageInfo = mPackageManager.getPackageInfo(context.getPackageName(),

PackageManager.GET_ACTIVITIES);

} catch (NameNotFoundException e) {

e.printStackTrace();

}

map.put("APP", "AppName");

map.put("用户名", SharedPreferencesUtils.getInstance().getUserName());

map.put("品牌", "" + Build.BRAND);

map.put("型号", "" + Build.MODEL);

map.put("SDK版本", "" + Build.VERSION.SDK_INT);

map.put("versionName", mPackageInfo.versionName);

map.put("versionCode", "" + mPackageInfo.versionCode);

map.put("crash时间", parserTime(System.currentTimeMillis()));

return map;

}

/**

* 获取系统未捕捉的错误信息

*

* @param throwable

* @return

*/

private String obtainExceptionInfo(Throwable throwable) {

StringWriter mStringWriter = new StringWriter();

PrintWriter mPrintWriter = new PrintWriter(mStringWriter);

throwable.printStackTrace(mPrintWriter);

mPrintWriter.close();

Log.e(TAG, mStringWriter.toString());

return mStringWriter.toString();

}

/**

* 保存获取的 软件信息，设备信息和出错信息保存在SDcard中

*

* @param context

* @param ex

* @return

*/

private String saveCrashReport2SD(Context context, Throwable ex) {

String fileName = null;

StringBuilder sb = new StringBuilder();

for (Map.Entry entry : obtainSimpleInfo(context).entrySet()) {

String key = entry.getKey();

String value = entry.getValue();

sb.append(key).append(" = ").append(value).append("n");

}

sb.append(obtainExceptionInfo(ex));

if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {

File dir = new File(CrashConstant.CRASH_DIR);

if (!dir.exists()) {

dir.mkdirs();

}

try {

fileName = dir.toString() + File.separator + parserTime(System.currentTimeMillis()) +".txt";

FileOutputStream fos = new FileOutputStream(fileName);

fos.write(sb.toString().getBytes());

fos.flush();

fos.close();

} catch (Exception e) {

e.printStackTrace();

}

}

return fileName;

}

/**

* 将毫秒数转换成yyyy-MM-dd-HH-mm-ss的格式，并在后缀加入随机数

*

* @param milliseconds

* @return

*/

private String parserTime(long milliseconds) {

System.setProperty("user.timezone", "Asia/Shanghai");

TimeZone tz = TimeZone.getTimeZone("Asia/Shanghai");

TimeZone.setDefault(tz);

SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

return format.format(new Date(milliseconds));

}

}