Android 播放视频

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字数统计: 434 word | 阅读时长 ≈ 2 min
思路

播放视频一般使用VideoView类实现：

  • setVideoPath：选择要播放的视频文件
  • start()：开始或继续播放视频
  • pause()：暂停播放
  • resume()：重头播放
  • seekTo()：跳转到指定时间
  • isPlaying()：判断当前播放状态
  • getDuration()：获取视频时长
Demo Code:
主布局：
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        
        <Button
            android:id="@+id/play"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="播放" />

        <Button
            android:id="@+id/pause"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="暂停" />

        <Button
            android:id="@+id/replay"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="重播" />

    </LinearLayout>

    <VideoView
        android:id="@+id/video_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>
主活动
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public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private VideoView videoView;
    private Button play;
    private Button pause;
    private Button replay;

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

        videoView = findViewById(R.id.video_view);
        play = findViewById(R.id.play);
        pause = findViewById(R.id.pause);
        replay = findViewById(R.id.replay);

        play.setOnClickListener(this);
        pause.setOnClickListener(this);
        replay.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();
        }
    }

    private void initVideoPath() {
        File file = new File(Environment.getExternalStorageDirectory() + "/Download/", "qinshi.mp4");
        Log.d("test", file.getPath());
        videoView.setVideoPath(file.getPath());
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.play:
                if (!videoView.isPlaying()) {
                    videoView.start();
                }
                break;
            case R.id.pause:
                if (videoView.isPlaying()) {
                    videoView.pause();
                }
                break;
            case R.id.replay:
                videoView.resume();
                break;
        }

    }

    @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, "没有权限", Toast.LENGTH_SHORT).show();
                    finish();
                }
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (videoView != null) {
            videoView.suspend();
        }
    }
}
添加权限
1
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

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