Android SeekBar控制视频播放进度(一)

Android SeekBar控制视频播放进度(一)

效果图

简介

使用VideoView控件播放视频时，我们希望能够调节播放的进度，一种方法是使用自带的控制器MediaController进行控制，另一种方法是自己实现一个SeekBar控制。

使用 MediaController 控制器

在播放视频时使用自带的控制器MediaController进行进度控制。

MediaController mediaController = new MediaController(this);
mVideoView.setMediaController(mediaController);

使用SeekBar

在播放视频时使用自己实现一个SeekBar控制播放进度。

1. 自定义SeekBar背景drawable/bg_rounded.xml，实现圆角半透明效果。

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">

    <!-- 背景颜色 -->
    <solid android:color="#20ffffff"/>

    <!-- 圆角背景 -->
    <corners
        android:topLeftRadius="12dp"
        android:topRightRadius="12dp"
        android:bottomLeftRadius="12dp"
        android:bottomRightRadius="12dp"/>

</shape>

2. 界面布局文件layout/activity_video.xml，界面中有一个用于视频播放的VideoView控件和控制播放进度的SeekBar控件。
   其中SeekBar使用第一步定义好的背景效果，android:background=“@drawable/bg_rounded”

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    android:background="#000"
    android:keepScreenOn="true"
    tools:context=".activitys.VideoActivity">

    <VideoView
        android:id="@+id/video_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

    <SeekBar
        android:id="@+id/seekbar"
        android:layout_width="500dp"
        android:layout_height="25dp"
        android:background="@drawable/bg_rounded"
        android:layout_marginBottom="45dp"
        android:progressTint="#7FFFD4"
        android:thumbTint="#7FFFD4"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"/>
        
</androidx.constraintlayout.widget.ConstraintLayout>

3. VideoActivity文件。

public class VideoActivity extends AppCompatActivity implements EdgeSensorView.MapDemo {
    
    

    private static final String TAG = "VideoActivity";

    private VideoView mVideoView;
    private SeekBar mSeekBar;

    private float curProgress;
    private float MAX_PROGRESS;

    private boolean isSeekBarProgress = false;

    private Handler handler = new Handler();

	// 播放过程，自动更新seekbar的进度
    private Runnable runnable = new Runnable() {
    
    

        public void run() {
    
    

            if (mVideoView.isPlaying()) {
    
    
                if (!isSeekBarProgress) {
    
    
                    int current = mVideoView.getCurrentPosition();
                    mSeekBar.setProgress(current);
                }
            }
            handler.postDelayed(runnable, 100);
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_video);

        mSeekBar = findViewById(R.id.seekbar);
        mVideoView = findViewById(R.id.video_view);
        mVideoView.setVideoURI(Uri.parse("android.resource://"
                + getApplicationContext().getPackageName() + "/" + R.raw.vid_bigbuckbunny));
//        MediaController mediaController = new MediaController(this);
//        mVideoView.setMediaController(mediaController);

        mVideoView.requestFocus();

        mVideoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
    
    
            @Override
            public void onPrepared(MediaPlayer mp) {
    
    
                mp.setLooping(true);

                MAX_PROGRESS = mVideoView.getDuration();
                mSeekBar.setMax((int) MAX_PROGRESS);

                Log.i(TAG, "onCreate: " + MAX_PROGRESS + "," + curProgress + "," + bitmaps.length);

                // 开始线程，更新进度条的刻度
                handler.postDelayed(runnable, 0);
                mVideoView.start();
            }
        });

        mVideoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
    
    
            @Override
            public void onCompletion(MediaPlayer mp) {
    
    
                curProgress = 0;
                mSeekBar.setProgress(0);
            }
        });

        mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
    
    
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
    
    

            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
    
    
                isSeekBarProgress = true;
                if (mVideoView.isPlaying()) {
    
    
                    mVideoView.pause();
                }
            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
    
    
                int pro = seekBar.getProgress();
                mVideoView.seekTo(pro);
                if (!mVideoView.isPlaying()) {
    
    
                    mVideoView.seekTo(pro);
                    mVideoView.start();
                }
                isSeekBarProgress = false;
            }
        });

    }

    @Override
    protected void onResume() {
    
    
        super.onResume();
    }

    @Override
    protected void onPause() {
    
    
        super.onPause();
    }

    @Override
    protected void onDestroy() {
    
    
        super.onDestroy();
        handler.removeCallbacks(runnable);
    }

    private void updateSeekBarStatus(final boolean b) {
    
    
        runOnUiThread(new Runnable() {
    
    
            @Override
            public void run() {
    
    
                mSeekBar.setPressed(b);
            }
        });
    }
}

拓展：

1. 增加控制播放/暂停的按钮；
2. 增加播放视频当前播放时间及总时长的文本显示；