Android Virtual Device keeps crashing

Question

every time i run the virtual device it tells me it has unexpectedly stopped working
here is my code

package com.example.crystalball;

import android.graphics.drawable.AnimationDrawable; import android.os.Bundle; import android.support.v7.app.ActionBarActivity; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.ImageView; import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

private CrystalBall mCrystalBall = new CrystalBall();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Declare our view variables and assign them views from the layout file
    final TextView answerLable = (TextView) findViewById(R.id.textView1); 
    Button getAnswerButton = (Button) findViewById(R.id.button1); 

    getAnswerButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            String answer = mCrystalBall.getAnAnswer(); 

            //Update Label with our new Dynamic answer

            answerLable.setText(answer);

            animateCrystalBall();
        }
    });
}

private void animateCrystalBall() {
    ImageView crystalBallImage = (ImageView) findViewById(R.id.imageView1);
    crystalBallImage.setImageResource(R.drawable.ball_animation);
    AnimationDrawable ballAnimation = (AnimationDrawable) crystalBallImage.getDrawable();
    if (ballAnimation.isRunning()){
        ballAnimation.stop();
    }
    ballAnimation.start();
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {

    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

}

Answer 1 · 2014-07-05T01:08:57Z

July 5, 2014 1:08am

The two lines go here, the second style section i.e. the application theme

<!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">
    <!-- All customizations that are NOT specific to a particular API-level can go here. -->
<item name="android:windowNoTitle">true</item>
<item name="android:windowFullscreen">true</item>
</style>

Answer 2 · 2014-07-05T00:31:20Z

July 5, 2014 12:31am

The error relates to java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity

The video in treehouse uses the Theme called ** Theme.Black.NoTitleBar.Fullscreen ** . Are you using this?

If yes, then the new android update no longer supports this. However there is a work around as proposed by treehouse

1) Change your project back to using "AppTheme" like it was before in AndroidManifest.xml and the preview.

2) Add the following two lines to the file res/values/styles.xml (inside the <style name="AppTheme"> tag):

<item name="android:windowNoTitle">true</item>
<item name="android:windowFullscreen">true</item>

3) Set the background color to black in the file res/layout/activity_main.xml. The root element, RelativeLayout, is the one that makes up the whole screen. Add this line after the layout_height line but before the closing angle bracket >:

android:background="@android:color/black"

4) Change MainActivity to extend Activity, not ActionBarActivity

Hope this helps. Ask again if you have doubts.

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Philip Harris

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Android Virtual Device keeps crashing

Philip Harris

Philip Harris

2 Answers

Gunjeet Hattar

Gunjeet Hattar

Philip Harris

Philip Harris

Gunjeet Hattar

Gunjeet Hattar

Gunjeet Hattar

Gunjeet Hattar

Philip Harris

Philip Harris