Java error api level method

This API was added only in API Level 17 Check this!

To avoid the crash, you can verify with the following code

if(Build.VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN_MR1){ //do your thing! } 

To get it working on lower API levels, you can create your own BaseActivity.java and add code like this

public class BaseActivity extends Activity { private boolean mDestroyed; public boolean isDestroyed(){ return mDestroyed; } @Override protected void onDestroy() { mDestroyed = true; super.onDestroy(); } } 

Now, make all your activities extend this BaseActivity as follows

public class MainActivity extends BaseActivity { ... } 

EDIT (After OP added code snippets)

First create a BaseActivity.java file as I have shown above. Then, make all your activities extend BaseActivity instead of Activity.

Now, change

private WeakReference<Activity> mActivityRef; 

to

private WeakReference<BaseActivity> mActivityRef; 

And change

Activity activity = mActivityRef.get(); 

to

BaseActivity activity = mActivityRef.get();