I paste some piece of my code here:

public void onCreate(Bundle savedInstanceState) {
        Log.e("Main Activity", "OnCreate");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_frame);

        //GlowEffect is the custom class's constructor:GlowEffect(context);
        new GlowEffect2(getApplictionContext());

        AlertDialog.Builder builder = new Builder(this);
...
...

I find that when I change the param in **Builder(this)** to Builder(getApplicationContext()); The app will crash! While the GlowEffect2 constructor works well whatever the param is "this" or "getApplicationContext()". SO what the difference between the two params? Thanks in advance!

I paste some piece of my code here:

public void onCreate(Bundle savedInstanceState) {
        Log.e("Main Activity", "OnCreate");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_frame);

        //GlowEffect is the custom class's constructor:GlowEffect(context);
        new GlowEffect2(getApplictionContext());

        AlertDialog.Builder builder = new Builder(this);
...
...

I find that when I change the param in **Builder(this)** to Builder(getApplicationContext()); The app will crash! While the GlowEffect2 constructor works well whatever the param is "this" or "getApplicationContext()". So what the difference between the two params?