App crash原因以及解决办法- https://blog.csdn.net/yangtuxiaojie/article/details/47123243
Android在程序崩溃或者捕获异常之后重新启动app- https://www.cnblogs.com/dingxiansen/p/8628998.html
如何使用UncaughtExceptionHandler捕获程序崩溃错误信息-https://blog.csdn.net/u013171283/article/details/79044984
--了解以下两个类：android.app.Application和java.lang.Thread.UncaughtExceptionHandler。
Application：用来管理应用程序的全局状态。在应用程序启动时Application会首先创建，然后才会根据情况(Intent)来启动相应的Activity和Service。本示例中将在自定义加强版的Application中注册未捕获异常处理器。
Thread.UncaughtExceptionHandler：线程未捕获异常处理器，用来处理未捕获异常。如果程序出现了未捕获异常，默认会弹出系统中强制关闭对话框。我们需要实现此接口，并注册为程序中默认未捕获异常处理。这样当未捕获异常发生时，就可以做一些个性化的异常处理操作。
> 实现UncaughtExceptionHandler接口，捕获到进程奔溃信息，并重启应用？
如何杀死异常进程，重启应用，就得使用PendingIntent，这个类是android中对Intent类的包装，可以去查看android API。通过AlarmManager 启动它，并且关闭打开的Activity杀死异常进程就能够实现重新启动应用。
1、收集所有 avtivity 用于彻底退出应用
2、捕获崩溃异常,保存错误日志,并重启应用
public class HKBaseApplication extends Application {
// activity对象列表,用于activity统一管理
private List<Activity> activityList;
// 异常捕获
protected boolean isNeedCaughtExeption = true;// 是否捕获未知异常
private PendingIntent restartIntent;
private MyUncaughtExceptionHandler uncaughtExceptionHandler;
private String packgeName;
@Override
public void onCreate() {
super.onCreate();
activityList = new ArrayList<Activity>();
packgeName = getPackageName();
if (isNeedCaughtExeption) {
cauchException();
}
}
// -------------------异常捕获-----捕获异常后重启系统-----------------//
private void cauchException() {
Intent intent = new Intent();
// 参数1：包名，参数2：程序入口的activity
intent.setClassName(packgeName, packgeName + ".LoginActivity");
restartIntent = PendingIntent.getActivity(getApplicationContext(), -1, intent,
Intent.FLAG_ACTIVITY_NEW_TASK);
// 程序崩溃时触发线程
uncaughtExceptionHandler = new MyUncaughtExceptionHandler();
Thread.setDefaultUncaughtExceptionHandler(uncaughtExceptionHandler);
}
// 创建服务用于捕获崩溃异常
private class MyUncaughtExceptionHandler implements UncaughtExceptionHandler {
@Override
public void uncaughtException(Thread thread, Throwable ex) {
// 保存错误日志
saveCatchInfo2File(ex);
// 1秒钟后重启应用
AlarmManager mgr = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 1000, restartIntent);
// 关闭当前应用
finishAllActivity();
finishProgram();
}
};
/**
* 保存错误信息到文件中
*
* @return 返回文件名称
*/
private String saveCatchInfo2File(Throwable ex) {
Writer writer = new StringWriter();
PrintWriter printWriter = new PrintWriter(writer);
ex.printStackTrace(printWriter);
Throwable cause = ex.getCause();
while (cause != null) {
cause.printStackTrace(printWriter);
cause = cause.getCause();
}
printWriter.close();
String sb = writer.toString();
try {
DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
String time = formatter.format(new Date());
String fileName = time + ".txt";
System.out.println("fileName:" + fileName);
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
String filePath = Environment.getExternalStorageDirectory() + "/HKDownload/" + packgeName
+ "/crash/";
File dir = new File(filePath);
if (!dir.exists()) {
if (!dir.mkdirs()) {
// 创建目录失败: 一般是因为SD卡被拔出了
return "";
}
}
System.out.println("filePath + fileName:" + filePath + fileName);
FileOutputStream fos = new FileOutputStream(filePath + fileName);
fos.write(sb.getBytes());
fos.close();
//文件保存完了之后,在应用下次启动的时候去检查错误日志,发现新的错误日志,就发送给开发者
}
return fileName;
} catch (Exception e) {
System.out.println("an error occured while writing file..." + e.getMessage());
}
return null;
}
// ------------------------------activity管理-----------------------//
// activity管理：从列表中移除activity
public void removeActivity(Activity activity) {
activityList.remove(activity);
}
// activity管理：添加activity到列表
public void addActivity(Activity activity) {
activityList.add(activity);
}
// activity管理：结束所有activity
public void finishAllActivity() {
for (Activity activity : activityList) {
if (null != activity) {
activity.finish();
}
}
}
// 结束线程,一般与finishAllActivity()一起使用
// 例如: finishAllActivity;finishProgram();
public void finishProgram() {
android.os.Process.killProcess(android.os.Process.myPid());
}
}
或
public class MyApplication extends Application implements Thread.UncaughtExceptionHandler {
@Override
public void onCreate() {
super.onCreate();
//设置Thread Exception Handler
Thread.setDefaultUncaughtExceptionHandler(this);
}
@Override
public void uncaughtException(Thread thread, Throwable ex) {
System.out.println("uncaughtException");
System.exit(0);
Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |
Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
}/*处理崩溃重叠*/
public class UnCeHandler implements Thread.UncaughtExceptionHandler {
private Thread.UncaughtExceptionHandler mDefaultHandler;
public static final String TAG = "CatchExcep";
AppApplication application;
public UnCeHandler(AppApplication application){
//获取系统默认的UncaughtException处理器
mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
this.application = application;
}
@Override
public void uncaughtException(Thread thread, Throwable ex) {
if(!handleException(ex) && mDefaultHandler != null){
//如果用户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(2000);
}catch (InterruptedException e){
Log.e(TAG, "error : ", e);
}
Intent intent = new Intent(application.getApplicationContext(), MainActivity.class);
PendingIntent restartIntent = PendingIntent.getActivity(
application.getApplicationContext(), 0, intent, Intent.FLAG_ACTIVITY_NEW_TASK);
//退出程序
AlarmManager mgr = (AlarmManager)application.getSystemService(Context.ALARM_SERVICE);
mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 1000,
restartIntent); // 1秒钟后重启应用
application.finishActivity();
}
}
/**
* 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
* @return true:如果处理了该异常信息;否则没有处理返回false.
*/
private boolean handleException(Throwable ex) {
if (ex == null) {
return false;
}
//使用Toast来显示异常信息
new Thread(){
@Override
public void run() {
Looper.prepare();
Toast.makeText(application.getApplicationContext(), "很抱歉,程序出现异常,即将退出.",
Toast.LENGTH_SHORT).show();
Looper.loop();
}
}.start();
return true;
}
}