Question

我在Android应用程序（我的手机Android 6.0.1 api 23）上工作应该在悬停时发出声音，在发布时停止播放。它不起作用。是因为我的硬件吗？或者我的代码错了？

JAVA：

import android.media.MediaPlayer;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;

public class MainActivity extends AppCompatActivity {

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

public class DisplayActivity  extends AppCompatActivity {

    private MediaPlayer player;

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


        player = MediaPlayer.create(this, R.raw.cena);


        player.setLooping(true);
    }


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


        player.release();
        player = null;
    }


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

        findViewById(R.id.hello).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:
                        player.pause();
                        player.seekTo(0);
                        break;
                }
                return true;
            }
        });
    }
}
}

XML：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.android.testonhover.MainActivity">

<TextView
    android:layout_width="wrap_content"
    android:id="@+id/hello"
    android:layout_height="wrap_content"
    android:text="Hover me!"
    android:layout_centerInParent="true"/>
</RelativeLayout>

你能解释一下我该怎样做才能让它发挥作用吗？

Onhoverlistener在android studio中不起作用

0 个答案: