android视频播放简单实现示例（VideoView&MediaPlayer）

2019-12-12 02:11:11

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如果你看过我的《android音乐播放简单实现（MediaPlayer）》，那么本篇将会毫无压力。

首先是主界面的三个按钮和一个播放控件

<?xml version="1.0" encoding="utf-8"?><LinearLayout 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:orientation="vertical" tools:context="com.cofox.myplayvideo.MainActivity"> <LinearLayout  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:orientation="horizontal">  <Button   android:id="@+id/btnPlay"   android:layout_width="0dp"   android:layout_height="wrap_content"   android:layout_weight="1"   android:text="Play"   android:textAllCaps="false" />  <Button   android:id="@+id/btnPause"   android:layout_width="0dp"   android:layout_height="wrap_content"   android:layout_weight="1"   android:text="Pause"   android:textAllCaps="false" />  <Button   android:id="@+id/btnReplay"   android:layout_width="0dp"   android:layout_height="wrap_content"   android:layout_weight="1"   android:text="Replay"   android:textAllCaps="false" /> </LinearLayout> <VideoView  android:id="@+id/vdvwFilm"  android:layout_width="match_parent"  android:layout_height="wrap_content" /></LinearLayout>

在 MainActivity.java 中这里需要用到的是 VideoView 作为视频播放时的显示位置。

 private VideoView videoView;

在 onCreate 里，对界面的按钮和显示位置实例化，并检查权限。

videoView = (VideoView)findViewById(R.id.vdvwFilm);  Button btnPlay = (Button)findViewById(R.id.btnPlay);  Button btnPause = (Button)findViewById(R.id.btnPause);  Button btnReplay = (Button)findViewById(R.id.btnReplay);  btnPlay.setOnClickListener(this);  btnPause.setOnClickListener(this);  btnReplay.setOnClickListener(this);  if(ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED){   ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);  }else {   initVideoPath();//初始化MediaPlayer  }

用一个单独的方法 initVideoPath() 来实现视频播放初始化

 private void initVideoPath() {  File file = new File(Environment.getExternalStorageDirectory(), "movie2.mp4");  videoView.setVideoPath(file.getPath());//指定视频文件路径  videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {   @Override   public void onPrepared(MediaPlayer mp) {    mp.setLooping(true);//让电影循环播放   }  }); }

onRequestPermissionsResult 中对权限的取得结果进行判断，并针对性操作。如果获得了权限，就执行初始化；如果没有获得权限，就提示用户。

 @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {  switch (requestCode){   case 1:    if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){     initVideoPath();    }else{     Toast.makeText(this, "拒绝权限，无法使用程序。", Toast.LENGTH_LONG).show();     finish();    }    break;   default:    break;  } }

在一个 onClick 方法中，统一处理 Play(播放)、Pause(暂停)、Replay(重新播放)的逻辑。

 @Override public void onClick(View v) {  switch (v.getId()){   case R.id.btnPlay:    if(!videoView.isPlaying()){     videoView.start();//播放    }    break;   case R.id.btnPause:    if(videoView.isPlaying()){     videoView.pause();//暂停    }    break;   case R.id.btnReplay:    if(videoView.isPlaying()){     videoView.resume();//重新播放    }    break;  } }

执行完毕，释放所有资源。

 @Override protected void onDestroy() {  super.onDestroy();  if(videoView != null){   videoView.suspend();  } }

完整代码示例：

package com.cofox.myplayvideo;import android.Manifest;import android.content.pm.PackageManager;import android.media.MediaPlayer;import android.os.Environment;import android.provider.MediaStore;import android.support.annotation.NonNull;import android.support.v4.app.ActivityCompat;import android.support.v4.content.ContextCompat;import android.support.v4.os.EnvironmentCompat;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.Toast;import android.widget.VideoView;import java.io.File;public class MainActivity extends AppCompatActivity implements View.OnClickListener { private VideoView videoView; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  videoView = (VideoView)findViewById(R.id.vdvwFilm);  Button btnPlay = (Button)findViewById(R.id.btnPlay);  Button btnPause = (Button)findViewById(R.id.btnPause);  Button btnReplay = (Button)findViewById(R.id.btnReplay);  btnPlay.setOnClickListener(this);  btnPause.setOnClickListener(this);  btnReplay.setOnClickListener(this);  if(ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED){   ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);  }else {   initVideoPath();//初始化MediaPlayer  } } private void initVideoPath() {  File file = new File(Environment.getExternalStorageDirectory(), "movie2.mp4");  videoView.setVideoPath(file.getPath());//指定视频文件路径  videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {   @Override   public void onPrepared(MediaPlayer mp) {    mp.setLooping(true);//让电影循环播放   }  }); } @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {  switch (requestCode){   case 1:    if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){     initVideoPath();    }else{     Toast.makeText(this, "拒绝权限，无法使用程序。", Toast.LENGTH_LONG).show();     finish();    }    break;   default:    break;  } } @Override public void onClick(View v) {  switch (v.getId()){   case R.id.btnPlay:    if(!videoView.isPlaying()){     videoView.start();//播放    }    break;   case R.id.btnPause:    if(videoView.isPlaying()){     videoView.pause();//暂停    }    break;   case R.id.btnReplay:    if(videoView.isPlaying()){     videoView.resume();//重新播放    }    break;  } } @Override protected void onDestroy() {  super.onDestroy();  if(videoView != null){   videoView.suspend();  } }}

在 AndroidManifest.xml 中配置相应的权限。

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.cofox.myplayvideo"> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>...

然后我们就可以看到运行结果了。