android视频播放简单实现示例(VideoView&MediaPlayer)
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。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我们。
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