Question

我在活动中有一个按钮，当我按下它时会播放声音。声音本身长2秒。它只在我按下按钮时播放。我想让用户可以按住按钮并播放声音，直到他释放按钮。我怎样才能做到这一点？这是我目前的代码。

package android.app;
import android.app.R;
import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;



public class activity2 extends Activity{

    /** Called when the activity is first created. */
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    setContentView(R.layout.main2);
//back button that takes u to main.xml
    Button next = (Button) findViewById(R.id.Back);
    next.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
        Intent intent = new Intent();
        setResult(RESULT_OK, intent);
        finish();
        }
        } );
    //Button that plays sound (whippingsound)
    Button sound = (Button) findViewById(R.id.sound);
        sound.setOnClickListener(new OnClickListener() {
             public void onClick(View v) {
                 MediaPlayer mp = MediaPlayer.create(activity2.this, R.raw.whippingsound);  
                 mp.start();
             }
        } );

    }   
}

感谢!!!

Answer 1

您的问题的解决方案是

的组合

Triggering event when Button is pressed down in Android

和

play sound while button is pressed -android

即，您使用onClickListener而不是onTouchListener。

请尝试使用此功能（注意：我还将媒体播放器移出，因此您只需创建一次并反复使用它。）

    public class activity2 extends Activity{
        MediaPlayer mp = null;

        /** Called when the activity is first created. */
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
        setContentView(R.layout.main2);
    //back button that takes u to main.xml
        Button next = (Button) findViewById(R.id.Back);
        next.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
            Intent intent = new Intent();
            setResult(RESULT_OK, intent);
            finish();
            }
            } );
        mp = MediaPlayer.create(activity2.this, R.raw.whippingsound);
        //Button that plays sound (whippingsound)
        Button sound = (Button) findViewById(R.id.sound);
            sound.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {

            switch (event.getAction()) {

            case MotionEvent.ACTION_DOWN:
                mp.setLooping(true);
                mp.start();
                break;

            case MotionEvent.ACTION_UP:
                mp.pause();
                break;
            }

            return true;
        }
     });
   }

怎么能反复发出声音，而不必多次按下它（android）

1 个答案: