android开发之实现应用内音乐的播放

待我称王封你为后i 2023-06-03 04:53 15阅读 0赞

由于代码比较简单,这里主要贴出代码,重要的部分有注释

1.文件结构

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hY2hpMQ_size_16_color_FFFFFF_t_70][]

2.activity\_main.xml布局文件

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/background">
        
        
        <ImageButton
            android:id="@+id/yy"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_alignParentRight="true"
            
            android:background="@android:color/transparent"
            android:onClick="isPlayOrPause"
            android:src="@drawable/yy"/>
    
    
    </RelativeLayout>

3.MainActivity.java文件

package com.example.greetingcard;
    
    import androidx.appcompat.app.AppCompatActivity;
    import androidx.core.app.ActivityCompat;
    import androidx.core.content.ContextCompat;
    
    import android.Manifest;
    import android.content.pm.PackageManager;
    import android.media.MediaPlayer;
    import android.os.Bundle;
    import android.view.View;
    import android.view.animation.Animation;
    import android.view.animation.RotateAnimation;
    import android.widget.ImageButton;
    
    public class MainActivity extends AppCompatActivity {
    
        private MediaPlayer mediaPlayer;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
        }
    
        public void isPlayOrPause(View view){
            ImageButton imageButton = (ImageButton)view;
            //RotateAnimation animation = new RotateAnimation(0, 360);
            //animation.setDuration(100000);
            //animation.setRepeatCount(Animation.INFINITE);
            //animation.setRepeatMode(Animation.RESTART);
            if(mediaPlayer == null){
                //imageButton.startAnimation(animation);
                //获取应用内的音乐文件
                mediaPlayer = MediaPlayer.create(this, R.raw.en);
                mediaPlayer.start();
            }
            else if(mediaPlayer.isPlaying()){
                mediaPlayer.pause();
                //imageButton.clearAnimation();
            }
            else{
                mediaPlayer.start();
                //imageButton.startAnimation(animation);
            }
        }
    
    }

效果:

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hY2hpMQ_size_16_color_FFFFFF_t_70 1][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hY2hpMQ_size_16_color_FFFFFF_t_70]: /images/20230601/4dc3766010c64397a8f5fdf2b841d5c3.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hY2hpMQ_size_16_color_FFFFFF_t_70 1]: /images/20230601/bd7de3aa316d4496bc36f6795c0769fb.png