Question

So recently i set up an intent where when a button is clicked it brings up a new activity. It works fine but when I go to the activity and then try to go back to the main screen I get a black screen. At the black screen if I hit back one more time it takes me to the main menu but this is annoying. Any ideas?

playbutton.java

package com.Dragon_Fruit;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;

public class playbutton extends Activity {

    @Override
        public void onCreate(Bundle savedInstanceState) {
            requestWindowFeature(Window.FEATURE_NO_TITLE);
            getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                    WindowManager.LayoutParams.FLAG_FULLSCREEN);
        super.onCreate(savedInstanceState);
        Intent myIntent = new Intent(playbutton.this, PlayActivity.class);
        playbutton.this.startActivity(myIntent);

    }

}

PlayActivity.java

package com.Dragon_Fruit;

import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;

public class PlayActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.playscreen);

}
}

PlayActivity in the Manifest

<activity android:name=".PlayActivity"
                  android:label="@string/app_name"
             android:screenOrientation="landscape" 
                  android:configChanges="keyboard|keyboardHidden|orientation">
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

DragonFruitActivity.java

package com.Dragon_Fruit;

import java.io.IOException;

import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageButton;

public class DragonFruitActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        // ***BUTTON SOUND***//
        final MediaPlayer buttonSound = MediaPlayer.create(
                DragonFruitActivity.this, R.raw.button_click);

        ImageButton playbutton = (ImageButton) findViewById(R.id.playbutton);
        playbutton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                arg0.setBackgroundResource(R.drawable.playbuttonselected);
                // TODO Auto-generated method stub
                if(buttonSound.isPlaying()) {
                    buttonSound.stop();
                }

                try {
                    buttonSound.prepare();
                } catch (IllegalStateException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }

                buttonSound.start();

                startActivity(new Intent(DragonFruitActivity.this,
                        playbutton.class));
            }

        });
        ImageButton settingsbutton = (ImageButton) findViewById(R.id.settingsbutton);
        settingsbutton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                if(buttonSound.isPlaying()) {
                    buttonSound.stop();
                }

                try {
                    buttonSound.prepare();
                } catch (IllegalStateException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }

                buttonSound.start();

                startActivity(new Intent(DragonFruitActivity.this,
                        settingsbutton.class));
            }

        });
    }
}

Answer 1

Your first activity never sets a layout. In the code shown, it looks like you’re going from playbutton to PlayActivity. When you press back in PlayActivity, it goes back to playbutton. Since you never called setContentView() on any layout in playbutton, it’s just a black screen that does nothing. It seems like you should just remove the playbutton activity.