android进程重启及activity恢复

知识链接

正对站内存在多个Activity且当前的Activity崩溃时，处理措施如下：
简单处理:
1.创建AppStatusManager类,记录App的状态;
2.在Application注册:registerActivityLifecycleCallbacks监听,在onActivityCreated中检测App是否重启过;
3.在LAUNCHER Activity的oncreate{super.onCreate}之前改变App的状态;
4.如果App被重启过则直接调用下面的代码:

 Intent intent = new Intent(activity, AppStart.class);
            intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivity(intent);

public class AppStatusManager {
    private static AppStatusManager mInstance = null;

    private int appStatus = AppStatusConstant.APP_FORCE_KILLED;

    private AppStatusManager() {

    }

    public static AppStatusManager getInstance() {
        if(mInstance==null) {
            synchronized (AppStatusManager.class) {
                if(mInstance==null)
                    mInstance = new AppStatusManager();
            }
        }
        return mInstance;
    }

    public void setAppStatus(int appStatus) {
        this.appStatus = appStatus;
    }

    public int getAppStatus() {
        return appStatus;
    }


    public static class AppStatusConstant {

        /**
         * 初始状态
         */
        public static final int APP_FORCE_KILLED = 0;

        /**
         * 正常运行
         */
        public static final int APP_NORMAL = 1;
    }
}

public class AppStart extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        AppStatusManager.getInstance().setAppStatus(AppStatusManager.AppStatusConstant.APP_NORMAL);
        super.onCreate(savedInstanceState);

    }

}

public class DroidPlannerApp extends Application implements DroneListener, ServiceListener {

    @Override
    public void onCreate() {
        super.onCreate();

        registerActivityLifecycleCallbacks(new ActivityLifecycleCallbacks() {
            @Override
            public void onActivityCreated(Activity activity, Bundle bundle) {
                checkAppStatus(activity);

            }

            @Override
            public void onActivityStarted(Activity activity) {

            }

            @Override
            public void onActivityResumed(Activity activity) {

            }

            @Override
            public void onActivityPaused(Activity activity) {

            }

            @Override
            public void onActivityStopped(Activity activity) {

            }

            @Override
            public void onActivitySaveInstanceState(Activity activity, Bundle bundle) {

            }

            @Override
            public void onActivityDestroyed(Activity activity) {

            }
        });

    }
    private void checkAppStatus(Activity activity) {
        if(AppStatusManager.getInstance().getAppStatus()==AppStatusManager.AppStatusConstant.APP_FORCE_KILLED) {
            Intent intent = new Intent(activity, AppStart.class);
            intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivity(intent);
        }
    }
}