Android学习1: Android初学视频播放

本菜今天又学习了一下使用MediaPlay实现视频播放的功能.

代码也不复杂..

使用SurfaceView, 来实现视频播放的窗口, 使用MediaPlay来实现视频的播入控制.

进度条是使用Timer来实时从MediaPlay中获取视频的播放进度来进行刷新.

截图:



代码如下:

com/example/youtwo/testvideo/MainActivity.java

package com.example.youtwo.testvideo;

import android.media.MediaPlayer;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.SeekBar;

import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;

public class MainActivity extends ActionBarActivity {

    private SurfaceView surfaceView = null;
    private SurfaceHolder surfaceHolder = null;
    private MediaPlayer m = null;
    private Button btn_start_video = null;
    private Button btn_stop_video = null;
    private boolean isChanging = false;
    private Timer mTimer;
    private TimerTask mTimerTask;
    private SeekBar skb_video = null;

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

        m = new MediaPlayer();

        surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
        surfaceHolder = surfaceView.getHolder();

        btn_start_video = (Button) this.findViewById(R.id.Button03);
        btn_start_video.setOnClickListener(new ClickEvent());

        btn_stop_video = (Button) this.findViewById(R.id.Button04);
        btn_stop_video.setOnClickListener(new ClickEvent());

        skb_video = (SeekBar) this.findViewById(R.id.SeekBar);
        skb_video.setOnSeekBarChangeListener(new SeekBarChangeEvent());

        mTimer = new Timer();
        mTimerTask = new TimerTask() {
            @Override
            public void run() {
                if (isChanging == true)
                    return;

                skb_video.setProgress(m.getCurrentPosition());
            }
        };
        mTimer.schedule(mTimerTask, 0, 10);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    class ClickEvent implements View.OnClickListener {
        @Override
        public void onClick(View v) {
            if (v == btn_start_video) {

                m.reset();
                m.setDisplay(surfaceHolder);//设置屏幕

                try {
                    m.setDataSource("/sdcard/test.mp4");
                    m.prepare();
                    m.start();
                    skb_video.setMax(m.getDuration());//设置SeekBar的长度
                } catch (IllegalArgumentException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IllegalStateException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            else if(v == btn_stop_video) {
                m.stop();
            }
        }
    }

    /*
    * SeekBar进度改变事件
    */
    class SeekBarChangeEvent implements SeekBar.OnSeekBarChangeListener {
        @Override
        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {
            isChanging = true;
        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
            isChanging = false;
        }
    }

}

layout/activity_main.xml

<RelativeLayout 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:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <LinearLayout android:id="@+id/LinearLayout01"
        android:layout_width="fill_parent" android:layout_height="wrap_content"
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical" >

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="播放视频"
                android:id="@+id/Button03" />

            <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="停止播放"
                android:id="@+id/Button04" />

        </LinearLayout>

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <SeekBar
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/SeekBar"
                android:indeterminate="false"
                android:layout_weight="1"
                android:layout_below="@+id/LinearLayout01"
                android:layout_alignParentLeft="true"
                android:layout_alignParentStart="true"
                android:layout_alignParentRight="true"
                android:layout_alignParentEnd="true" />
        </LinearLayout>

    </LinearLayout>

    <SurfaceView
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:id="@+id/surfaceView"
        android:layout_below="@+id/LinearLayout01"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

</RelativeLayout>