Question

当我将鼠标悬停在HOVER_EXIT上时，我想要我的按钮（应该是按钮还是其他？）来播放音乐。我应该实施什么 case MotionEvent.ACTION_HOVER_MOVE:让按钮播放音乐仍然无法暂停，从ENTER到EXIT和MOVE暂停不做任何事情？还有一个错误 - 当我尝试使用此悬停按钮打开屏幕时，应用程序崩溃并关闭。这是我的java代码：

import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;

public class DisplayActivity extends AppCompatActivity {

Button b1;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_screen);
    b1 = (Button)findViewById(R.id.button1);
    b1.setOnHoverListener(new View.OnHoverListener()
    {

        @Override
        public boolean onHover(View v, MotionEvent event) {
            MediaPlayer player=MediaPlayer.create(DisplayActivity.this,R.raw.sound);
            switch (event.getAction()) {
                case MotionEvent.ACTION_HOVER_ENTER:
                   player.start();
                    break;
                case MotionEvent.ACTION_HOVER_EXIT:
                    player.stop();
                    break;
            }
            return true;

        }
    });}`

Answer 1

public class DisplayActivity  extends AppCompatActivity {

    private MediaPlayer player;

    @Override
    protected void onResume() {
        super.onResume();

        // create media player only when required
        player = MediaPlayer.create(this, R.raw.sound);

        // this will keep the audio playing, even if you hover for long time
        player.setLooping(true);
    }


    @Override
    protected void onPause() {
        super.onPause();

        // release is as soon as possible
        player.release();
        player = null;
    }


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

        findViewById(R.id.button1).setOnHoverListener(new View.OnHoverListener() {

            @Override
            public boolean onHover(
                    View v,
                    MotionEvent event) {
                switch (event.getAction()) {
                case MotionEvent.ACTION_HOVER_ENTER:
                    player.start();
                    break;
                case MotionEvent.ACTION_HOVER_EXIT:
                    // if you choose to stop the player, you need to prepare it again by calling player.prepare(); before restarting it.
                    // I chose to pause it and seek it back to beginning
                    player.pause();
                    player.seekTo(0);
                    break;
                }
                return true;
            }
        });
    }
}

希望这会有所帮助：）

任何人都可以处理它吗？

1 个答案: