android实现控制视频播放次数

2022-11-03 14:12:51

android实现控制视频播放次数，实质就是每个视频片段播放完后，通过MediaPlayer设置监听器setOnCompletionListener监听视频播放完毕，用Handler发送消息再次激活视频播放，从而达到控制播放次数的效果。视频文件foot_2_foot_crunch.mp4请放到assets文件夹下。

主界面代码如下：

activity_main.xml

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

     xmlns:tools="http://schemas.android.com/tools"

     android:layout_width="fill_parent"

     android:layout_height="fill_parent"

     android:orientation="vertical"

     tools:context=".MainActivity" >

        <include

            android:id="@+id/topbar"

            layout="@layout/topbar"/>

        <RelativeLayout

            android:layout_width="fill_parent"

         android:layout_height="fill_parent">

         <LinearLayout

             android:id="@+id/linearlayout"

             android:layout_width="fill_parent"

             android:layout_height="40dp"

             android:orientation="horizontal"

             android:layout_alignParentBottom="true"

             android:gravity="center"

             android:background="#4682B4">

             <Button

                 android:id="@+id/button_play"

                 android:layout_width="wrap_content"

                 android:layout_height="wrap_content"

                 android:background="@drawable/play"

                 android:layout_gravity="center"

                 android:layout_marginRight="8dp"

                 android:layout_marginLeft="6dp"/>

             <RelativeLayout

                 android:layout_width="fill_parent"

                 android:layout_height="fill_parent"

                 android:orientation="horizontal"

                 android:gravity="center">

                 <TextView

                     android:id="@+id/textview_display_time"

                     android:layout_width="80dp"

                     android:layout_height="fill_parent"

                     android:textSize="16sp"

                     android:text="时间显示"

                     android:textColor="#ffffff"

                     android:gravity="center"

                     android:layout_alignParentRight="true"/>

                 <ProgressBar

                     android:id="@+id/progressbar"

                     android:layout_toLeftOf="@id/textview_display_time"

                     style="@style/pb_vedio"

                     android:layout_width="fill_parent"

                     android:layout_height="20dp"

                     android:layout_centerVertical="true"

                     android:progress="0"/>

             </RelativeLayout>

         </LinearLayout>

         <LinearLayout

             android:layout_above="@id/linearlayout"

             android:layout_width="fill_parent"

             android:layout_height="fill_parent"

             android:background="#ffffff">

             <SurfaceView

                 android:id="@+id/surfaceview_vedio"

                 android:layout_width="wrap_content"

                 android:layout_height="wrap_content"/>

         </LinearLayout>

         <RelativeLayout

             android:id="@+id/relativelayout1"

                android:layout_above="@id/linearlayout"

             android:layout_width="fill_parent"

             android:layout_height="fill_parent">

             <TextView

                    android:id="@+id/textview_tip"

                 android:layout_width="fill_parent"

                 android:layout_height="fill_parent"

                 android:textSize="25sp"

                 android:text="提醒"

                 android:textColor="#ffffff"

                 android:gravity="center"

                 android:background="#80696969"/>

             <LinearLayout

                 android:layout_width="wrap_content"

                 android:layout_height="fill_parent"

                 android:gravity="center">

                 <Button

                        android:id="@+id/btn_left"

                     android:layout_width="wrap_content"

                     android:layout_height="wrap_content"

                     android:background="@drawable/btn_prev"/>

             </LinearLayout>

             <TextView

                    android:id="@+id/textview_count"

                 android:layout_width="wrap_content"

                 android:layout_height="wrap_content"

                 android:textSize="25sp"

                 android:paddingLeft="10dp"

                 android:text="0/30"

                 android:textColor="#000000"/>

             <LinearLayout

                 android:layout_width="wrap_content"

                 android:layout_height="fill_parent"

                 android:gravity="center"

                 android:layout_alignParentRight="true">

                 <Button

                        android:id="@+id/btn_right"

                     android:layout_width="wrap_content"

                     android:layout_height="wrap_content"

                     android:background="@drawable/btn_next"/>

             </LinearLayout>

         </RelativeLayout>

     </RelativeLayout>

 </LinearLayout>

topbar.xml

 <?xml version="1.0" encoding="utf-8"?>

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

     android:layout_width="fill_parent"

     android:layout_height="40dp"

     android:orientation="vertical" >

     <TextView

         android:id="@+id/topbar_textview"

         android:layout_width="fill_parent"

         android:layout_height="38dp"

         android:text="加载中..."

         android:textSize="16sp"

         android:textColor="#ffffff"

         android:paddingLeft="6dp"

         android:gravity="center"

         android:background="#4682B4"/>

     <View

         android:layout_width="fill_parent"

            android:layout_height="2dp"

            android:background="#2F4F4F"/>

 </LinearLayout>

MainActivity.java

 package com.example.playvediodemo;

 import java.io.IOException;

 import android.media.AudioManager;

 import android.media.MediaPlayer;

 import android.os.Bundle;

 import android.os.Handler;

 import android.os.Message;

 import android.view.SurfaceHolder;

 import android.view.SurfaceView;

 import android.view.View;

 import android.view.View.OnClickListener;

 import android.widget.Button;

 import android.widget.ProgressBar;

 import android.widget.TextView;

 import android.app.Activity;

 import android.content.res.AssetFileDescriptor;

 import android.content.res.AssetManager;

 public class MainActivity extends Activity implements SurfaceHolder.Callback{

     private MediaPlayer player;

     private SurfaceView surface;

     private SurfaceHolder surfaceHolder;

     private Button button,button_left,button_right;

     private TextView tv_display_time,tv_tip,tv_count,tv_title;

     private ProgressBar pb;

     private Handler handler;

     private int count;//播放动过个数

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         button = (Button)findViewById(R.id.button_play);

         surface = (SurfaceView)findViewById(R.id.surfaceview_vedio);

         tv_display_time = (TextView)findViewById(R.id.textview_display_time);

         button_left = (Button)findViewById(R.id.btn_left);

         button_right = (Button)findViewById(R.id.btn_right);

         tv_title = (TextView)findViewById(R.id.topbar_textview);

         tv_tip = (TextView)findViewById(R.id.textview_tip);

         tv_count = (TextView)findViewById(R.id.textview_count);

         pb = (ProgressBar)findViewById(R.id.progressbar);

         player=new MediaPlayer();

         surfaceHolder=surface.getHolder();//SurfaceHolder是SurfaceView的控制接口

         surfaceHolder.addCallback(this); //因为这个类实现了SurfaceHolder.Callback接口，所以回调参数直接this

         //surfaceHolder.setFixedSize(720, 480);//显示的分辨率,不设置为视频默认

         surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);//设置SurfaceView自己不管理缓冲区

         surfaceHolder.setKeepScreenOn(true);//设置播放视频时保持屏幕常亮

         pb.setMax(30);

         //定义一个Hander实现自动播放N次对应的视频片段

         handler = new Handler(){

             @Override

             public void handleMessage(Message e){

                 if(e.what==0x1000){

                     player.start();

                     button.setBackgroundResource(R.drawable.pause);

                     pb.setProgress(count);

                 //一项锻炼完成，不用再次播放动画，仅仅为了让进度条可以填满

                 }else if(e.what==0x1001){

                     pb.setProgress(30);

                 }

             }

         };

         //监听播放一个视频片段完成

         player.setOnCompletionListener(new MediaPlayer.OnCompletionListener(){

             @Override

             public void onCompletion(MediaPlayer arg0) {

                 if(count<(30-1)){

                     handler.sendEmptyMessage(0x1000);

                     count++;

                     tv_count.setText(count+"/"+30);

                 }else{

                     count=0;

                     handler.sendEmptyMessage(0x1001);

                     button.setBackgroundResource(R.drawable.play);

                     tv_tip.setVisibility(View.VISIBLE);

                     tv_tip.setText(30+"/"+30+" 动作完成.");

                     tv_count.setText(30+"/"+30);

                 }

             }

         });

         //控制播放暂停的按钮

         button.setOnClickListener(new OnClickListener(){

             @Override

             public void onClick(View arg0) {

                 if(player.isPlaying()){

                     player.pause();

                     button.setBackgroundResource(R.drawable.play);

                     tv_tip.setVisibility(View.VISIBLE);

                     tv_tip.setText("暂停中");

                 }else{

                     player.start();

                     button.setBackgroundResource(R.drawable.pause);

                     tv_tip.setVisibility(View.GONE);

                 }                

             }

         });

         //上一个视频

         button_left.setOnClickListener(new OnClickListener(){

             @Override

             public void onClick(View arg0) {

             }

         });

         //下一个视频

         button_right.setOnClickListener(new OnClickListener(){

             @Override

             public void onClick(View arg0) {

             }

         });

     }

     @Override

     public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {

     }

     @Override

     public void surfaceCreated(SurfaceHolder holder) {

         AssetManager assetManager = this.getAssets();

         //必须在surface创建后才能初始化MediaPlayer,否则不会显示图像

         player.reset();

         player.setAudioStreamType(AudioManager.STREAM_MUSIC);

         player.setDisplay(surfaceHolder);

         try {

             AssetFileDescriptor fileDescriptor = assetManager.openFd("foot_2_foot_crunch.mp4");

             //设置显示视频显示在SurfaceView上

             player.setDataSource(fileDescriptor.getFileDescriptor(),

                     fileDescriptor.getStartOffset(),

                     fileDescriptor.getLength());

             player.prepare();

             player.start();

             button.setBackgroundResource(R.drawable.pause);

             count=0;

             tv_count.setText(count+"/"+30);

             tv_tip.setVisibility(View.GONE);

         } catch (IOException e) {

             e.printStackTrace();

         }

     }

     @Override

     public void surfaceDestroyed(SurfaceHolder holder) {

     }

     @Override

     protected void onDestroy() {

         super.onDestroy();

         if(player.isPlaying()){

             player.stop();

         }

         player.release();//Activity销毁时停止播放，释放资源。不做这个操作，即使退出还是能听到视频播放的声音

     }

 }

values文件夹下styles.xml

 <resources>

 <style name="pb_vedio" parent="@android:style/Widget.ProgressBar.Horizontal">

        <item name="android:maxHeight">50dip</item>

        <item name="android:minHeight">10dip</item>

        <item name="android:indeterminateOnly">false</item>

        <item name="android:indeterminateDrawable">@android:drawable/progress_indeterminate_horizontal</item>

        <item name="android:progressDrawable">@drawable/pb_vedio</item>

   </style>

 </resources>

以下是两个个自定义button和一个自定义progressbar样式的代码，都放在drawable文件夹下

自定义进度条样式

pd_vedio.xml

 <?xml version="1.0" encoding="utf-8"?>

 <layer-list xmlns:android="http://schemas.android.com/apk/res/android" >  

     <item android:id="@android:id/background">

          <shape >

                 <!--  corners android:radius="2dip" /-->

                 <gradient

                     android:angle="270"

                     android:centerY="0.75"

                     android:endColor="#AFEEEE"

                     android:startColor="#AFEEEE" />

                 <stroke

                     android:width="1dp"

                     android:color="#ffffff"/>

             </shape>

     </item>  

     <item android:id="@android:id/secondaryProgress">  

         <clip >

             <shape >

                 <!--corners android:radius="2dip" /-->

                 <gradient

                     android:angle="270"

                     android:centerY="0.75"

                     android:endColor="#A04682B4"

                     android:startColor="#A04682B4" />

                 <stroke

                     android:width="1dp"

                     android:color="#ffffff"/>

             </shape>

         </clip>

     </item>  

     <item android:id="@android:id/progress">  

         <clip >

             <shape >

                 <!--corners android:radius="2dip" /-->

                 <gradient

                     android:angle="270"

                     android:centerY="0.75"

                     android:endColor="#A04682B4"

                     android:startColor="#A04682B4"/>

                 <stroke

                     android:width="1dp"

                     android:color="#ffffff"/>

             </shape>  

         </clip>

     </item>

 </layer-list>

btn_next.xml

 <?xml version="1.0" encoding="utf-8"?>

 <selector xmlns:android="http://schemas.android.com/apk/res/android" >

     <item android:drawable="@drawable/next_pressed" android:state_pressed="true"/>

     <item android:drawable="@drawable/next" android:state_focused="false" android:state_pressed="false"/>

     <item android:drawable="@drawable/next_pressed"  android:state_focused="true"/>

     <item android:drawable="@drawable/next" android:state_focused="false"/>

 </selector>

btn_prev.xml

 <?xml version="1.0" encoding="utf-8"?>

 <selector xmlns:android="http://schemas.android.com/apk/res/android" >

     <item android:drawable="@drawable/prev_pressed" android:state_pressed="true"/>

     <item android:drawable="@drawable/prev" android:state_focused="false" android:state_pressed="false"/>

     <item android:drawable="@drawable/prev_pressed"  android:state_focused="true"/>

     <item android:drawable="@drawable/prev" android:state_focused="false"/>

 </selector>

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