Android VideoView播放视频控制：开始、暂停、快进（3）

<FrameLayout 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"
    tools:context="com.example.videoview.MainActivity" >

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

    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/start"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="开始" />

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

        <Button
            android:id="@+id/seekto"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="3秒处" />
    </LinearLayout>

</FrameLayout>

Java代码：

package com.example.videoview;

import java.io.File;

import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.Button;
import android.widget.VideoView;

public class MainActivity extends Activity implements Button.OnClickListener {

	private VideoView videoView;

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

		videoView = (VideoView) findViewById(R.id.videoView);

		// 获得的path等于:/storage/emulated/0/DCIM
		File path = Environment
				.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);

		// 拼接完整路径
		File f = new File(path, "/Camera/test.mp4");

		// 此时的f.getAbsolutePath()=/storage/emulated/0/DCIM//\Camera/test.mp4
		videoView.setVideoPath(f.getAbsolutePath());

		// 开始播放视频
		// videoView.start();

		// VideiView获焦点
		// videoView.requestFocus();

		Button start = (Button) findViewById(R.id.start);
		start.setOnClickListener(this);

		Button pause = (Button) findViewById(R.id.pause);
		pause.setOnClickListener(this);

		Button seekto = (Button) findViewById(R.id.seekto);
		seekto.setOnClickListener(this);
	}

	@Override
	public void onClick(View v) {

		switch (v.getId()) {

		// 开始播放
		case R.id.start:
			videoView.start();
			break;

		// 暂停
		case R.id.pause:
			videoView.pause();
			break;

		// 3秒处
		case R.id.seekto:
			videoView.seekTo(3 * 1000);
			break;

		default:
			break;
		}
	}
}