Android MediaPlayer
这里写自定义目录标题
-
- 参考网址
-
- 拷贝音频文件 三种位置
- 主界面布局文件
- 主界面代码文件
- 使用SoundPool播放音效
- 使用VideoView组件播放视频
-
- 布局文件
- Java代码 实现播放和控制
- 增加文件读写的权限
- 设置界面横屏
- 使用MediaPlayer播放视频
-
- 布局文件
- Java代码
参考网址
1、https://blog.csdn.net/wangmx1993328/article/details/82798626
2、https://blog.csdn.net/sinat_38892960/article/details/86064461
拷贝音频文件 三种位置
1.在res raw下
2、在main assets下
3、在sdcard中
主界面布局文件
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:orientation="vertical">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="播放"
android:id="@+id/btn_play"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="暂停"
android:id="@+id/btn_pause"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="停止"
android:id="@+id/btn_stop"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="当前时间"
android:id="@+id/tv_now"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="总时长"
android:id="@+id/tv_total"
android:layout_alignParentRight="true"
/>
RelativeLayout>
<SeekBar
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:max="100"
android:progress="0"
android:id="@+id/seekBar"/>
LinearLayout>
主界面代码文件
package com.example.demo;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import android.Manifest;
import android.app.Activity;
import android.content.pm.PackageManager;
import android.content.res.AssetFileDescriptor;
import android.media.MediaParser;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.TextView;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
private static final int MSG_PLAY = 1001;
private Button btn_play;
private Button btn_pause;
private Button btn_stop;
private MediaPlayer mediaPlayer;
private TextView tv_now;
private TextView tv_total;
private SeekBar seekBar;
private Handler handler;
private int duration;
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE };
private boolean isPauseListener = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initHandler();
tv_now = findViewById(R.id.tv_now);
tv_total = findViewById(R.id.tv_total);
seekBar = findViewById(R.id.seekBar);
// 检查是否有权限
verifyStoragePermissions(this);
btn_play = findViewById(R.id.btn_play);
btn_pause = findViewById(R.id.btn_pause);
btn_stop = findViewById(R.id.btn_stop);
btn_play.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mediaPlayer == null) {
// 第一种 位置在res/raw
/*mediaPlayer = MediaPlayer.create(
MainActivity.this, R.raw.xiaoqingwa);*/
// 第二种 位置在main/assets
/**
try {
AssetFileDescriptor descriptor = getAssets().openFd("shangfeng.aac");
mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource(descriptor);
mediaPlayer.prepare();
} catch (IOException e) {
e.printStackTrace();
}
*/
// 第三种 位置在sd卡
try {
String filePath = "/storage/emulated/0/Pictures/shangfeng.aac";
mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource(filePath);
mediaPlayer.prepare();
} catch (IOException e) {
e.printStackTrace();
}
}
mediaPlayer.start();
duration = mediaPlayer.getDuration();
Log.e("mediaPlayer", "duration = " + duration);
// 将毫秒数转换成 mm：ss格式
String text = getTimeStr(duration);
tv_total.setText(text);
}
});
btn_pause.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mediaPlayer != null){
mediaPlayer.pause();
}
}
});
btn_stop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mediaPlayer!=null){
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
}
}
});
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if(isPauseListener){
return;
}
Log.e("seekBar","onProgressChanged");
int msec = duration * progress / 100;
mediaPlayer.seekTo(msec);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
// 开一个线程 每隔300毫秒查询当前进度
new Thread(new Runnable() {
@Override
public void run() {
while (true){
try {
Thread.sleep(300);
} catch (InterruptedException e) {
e.printStackTrace();
}
if(mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition();
Log.e("mediaPlayer", "currentPosition = " + currentPosition);
// 发消息 更新
Message message = new Message();
message.what = MSG_PLAY;
message.arg1 = currentPosition;
handler.sendMessage(message);
}
}
}
}).start();
}
private void initHandler() {
handler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(@NonNull Message msg) {
if(msg.what == MSG_PLAY){
// 显示当前时间
String text = getTimeStr(msg.arg1);
tv_now.setText(text);
// 计算当前的进度
int progress = 100 * msg.arg1 / duration;
// 在设置进度时 先把listener禁用
isPauseListener = true;
seekBar.setProgress(progress);
// 在设置进度完成时 再把listener起用
isPauseListener = false;
return true;
}
return false;
}
});
}
/*
获取时间字符格式
*/
private String getTimeStr(int duration) {
int secTotal = duration / 1000;
int sec = secTotal % 60;
int min = secTotal / 60;
StringBuffer stringBuffer = new StringBuffer();
stringBuffer.append(min);
stringBuffer.append(":");
if(sec < 10){
stringBuffer.append("0");
}
stringBuffer.append(sec);
return stringBuffer.toString();
}
/**
* 检查当前Activity是否有某种权限 没有则弹出授权框
* @param activity
*/
public static void verifyStoragePermissions(Activity activity) {
// Check if we have write permission
int permission = ActivityCompat.checkSelfPermission(activity,
Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (permission != PackageManager.PERMISSION_GRANTED) {
// We don't have permission so prompt the user
ActivityCompat.requestPermissions(activity, PERMISSIONS_STORAGE,
REQUEST_EXTERNAL_STORAGE);
}
}
}
使用SoundPool播放音效
package com.example.demo;
import androidx.appcompat.app.AppCompatActivity;
import android.media.AudioManager;
import android.media.SoundPool;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
private Button btn1;
private Button btn2;
private Button btn3;
private Button btn4;
private Button btn5;
private SoundPool soundPool;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
soundPool = new SoundPool(10, AudioManager.STREAM_MUSIC, 1);
int wav1 = soundPool.load(MainActivity.this, R.raw.chimes, 1);
int wav2 = soundPool.load(MainActivity.this, R.raw.ding, 1);
int wav3 = soundPool.load(MainActivity.this, R.raw.enter, 1);
int wav4 = soundPool.load(MainActivity.this, R.raw.notify, 1);
int wav5 = soundPool.load(MainActivity.this, R.raw.ringout, 1);
btn1 =findViewById(R.id.btn1);
btn2 =findViewById(R.id.btn2);
btn3 =findViewById(R.id.btn3);
btn4 =findViewById(R.id.btn4);
btn5 =findViewById(R.id.btn5);
btn1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
soundPool.play(wav1, 1, 1,1,0, 1);
}
});
}
}
使用VideoView组件播放视频
布局文件
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:orientation="vertical">
<VideoView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/videoView"/>
LinearLayout>
Java代码 实现播放和控制
package com.example.myapplication;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import android.Manifest;
import android.app.Activity;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.widget.MediaController;
import android.widget.VideoView;
public class MainActivity extends AppCompatActivity {
private VideoView videoView;
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE };
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 检查动态权限
verifyStoragePermissions(this);
String filePath = "/sdcard/Movies/family.mp4";
videoView = findViewById(R.id.videoView);
videoView.setVideoPath(filePath);
videoView.start();
MediaController mediaController = new MediaController(MainActivity.this);
videoView.setMediaController(mediaController);
}
/**
* 检查当前Activity是否有某种权限 没有则弹出授权框
* @param activity
*/
public static void verifyStoragePermissions(Activity activity) {
// Check if we have write permission
int permission = ActivityCompat.checkSelfPermission(activity,
Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (permission != PackageManager.PERMISSION_GRANTED) {
// We don't have permission so prompt the user
ActivityCompat.requestPermissions(activity, PERMISSIONS_STORAGE,
REQUEST_EXTERNAL_STORAGE);
}
}
}
增加文件读写的权限
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
设置界面横屏
在中增加一个属性
<activity android:name=".MainActivity"
android:screenOrientation="landscape">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
intent-filter>
activity>
使用MediaPlayer播放视频
布局文件
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:orientation="vertical" >
<SurfaceView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/surface_view"/>
LinearLayout>
Java代码
package com.example.mediaplayerdemo;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.MediaController;
public class MainActivity extends AppCompatActivity{
private MediaPlayer mediaPlayer;
private SurfaceView surfaceView;
private SurfaceHolder surfaceHolder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mediaPlayer = MediaPlayer.create(MainActivity.this, R.raw.family);
surfaceView = findViewById(R.id.surface_view);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(new SurfaceHolder.Callback() {
@Override
public void surfaceCreated(@NonNull SurfaceHolder holder) {
mediaPlayer.setDisplay(holder);
mediaPlayer.start();
}
@Override
public void surfaceChanged(@NonNull SurfaceHolder holder, int format, int width, int height) {
}
@Override
public void surfaceDestroyed(@NonNull SurfaceHolder holder) {
}
});
}
}