Android开发 ---Media

 

1、ctivity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:text="播放音乐"
        android:onClick="playMusic"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <Button
        android:text="播放视频_1"
        android:onClick="playVedio_1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <Button
        android:text="播放视频_2"
        android:onClick="playVedio_2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <Button
        android:text="播放视频_3"
        android:onClick="playVedio_3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <Button
        android:text="录音"
        android:onClick="recorder_test"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <Button
        android:text="录像"
        android:onClick="recorder_video_test"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

2、MainActivity.java

package com.example.android_media;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
　　//播放音乐
    public void playMusic(View view){
        Intent intent=new Intent(this,PlayMusicActivity.class);
        startActivity(intent);
    }

    //播放视频一
    public void playVedio_1(View view){
        Intent intent=new Intent(Intent.ACTION_VIEW);
　　　　　//定义视频路径
        Uri uri= Uri.parse("file:///sdcard/goodmm.mp4");
　　　　　//根据uri查找指定类型的文件
        intent.setDataAndType(uri,"video/mp4");
        startActivity(intent);
    }

    //播放视频二
    public void playVedio_2(View view){
        Intent intent=new Intent(this,PlayVideoActivity.class);
        startActivity(intent);
    }

    //播放视频三
    public void playVedio_3(View view){
        Intent intent=new Intent(this,PlayVideo_2Activity.class);
        startActivity(intent);
    }
　　 //录音
    public void recorder_test(View view){
        Intent intent=new Intent(this,RecorderActivity.class);
        startActivity(intent);
    }
　　//录像
    public void recorder_video_test(View view){
        Intent intent=new Intent(this,Recorder_VideoActivity.class);
        startActivity(intent);
    }
}

3、activity_play_music.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_play_music"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <SeekBar
        android:id="@+id/sb"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <Button
            android:text="播放"
            android:onClick="doPlay"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />
        <Button
            android:text="暂停"
            android:onClick="doPause"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />
        <Button
            android:text="停止"
            android:onClick="doStop"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />
    </LinearLayout>
</LinearLayout>

4、PlayMusicActivity.java

package com.example.android_media;

import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Environment;
import android.os.SystemClock;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.SeekBar;

import java.io.IOException;

public class PlayMusicActivity extends Activity {
　　//拖动条
    private SeekBar sb;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_play_music);
        sb=(SeekBar)findViewById(R.id.sb);
　　　　　//设置进度条改变监听事件
        sb.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
            }
            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }
            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                if(mp!=null)
　　　　　　　　　　　　//改变音频播放进度，通过拖动条的位置实现快进和后退
                    mp.seekTo(seekBar.getProgress());
            }
        });
    }

    //播放音乐
　　 //播放器
    MediaPlayer mp;
    boolean isRun=true;
    public void doPlay(View view){
        if(mp!=null)
            return;
        isRun=true;
　　　　　//实例化播放器
        mp=new MediaPlayer();//构建一个播放器对象
　　　　　//使用reset()方法来恢复一些意外错误
        mp.reset();
　　　　　//获取音频路径
        String path= Environment.getExternalStorageDirectory().getAbsolutePath()+"/nobody.mp3";
        try {
　　　　　　　//给播放器加载资源
            mp.setDataSource(path);//设置要播放的文件路径
            mp.setAudioStreamType(AudioManager.STREAM_MUSIC);//设置多媒体类型
            mp.prepare();//准备就绪
　　　　　　　//getDuration() 获取音频文件的总长度，将其设置为进度条的长度
            sb.setMax(mp.getDuration());//设置进度条最大值
            mp.start();//开始播放

            //更新进度
            new Thread(new Runnable() {
                @Override
                public void run() {
　　　　　　　　　　　　//mp.getCurrentPosition()获取音频当前播放点
　　　　　　　　　　　　//如果正在播放并且当前播放点小于音频的最大长度

while(isRun&&mp.getCurrentPosition()<=sb.getMax()){
　　　　　　　　　　　　　　 //设置拖动条当前的位置和音频播放的当前播放点的位置保持一致
                        sb.setProgress(mp.getCurrentPosition());
                        SystemClock.sleep(200);
                    }
                }
            }).start();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void doPause(View view){
        if(mp==null)
            return;
        if(mp.isPlaying()){
            mp.pause();
            ((Button)view).setText("继续播放");
        }else{
            mp.start();
            ((Button)view).setText("暂停");
        }
    }

    public void doStop(View view){
        if(mp!=null&&mp.isPlaying()){
            isRun=false;
            mp.stop();
            mp.release();
            mp=null;
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        doStop(null);
    }
}

5、activity_play_video.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_play_video"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <VideoView
        android:id="@+id/videoView"
        android:background="@drawable/bg"
        android:layout_width="match_parent"
        android:layout_height="300dp" />
</LinearLayout>

6、PlayVideoActivity.java

package com.example.android_media;

import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.os.SystemClock;
import android.widget.MediaController;
import android.widget.VideoView;

public class PlayVideoActivity extends Activity {

    private VideoView videoView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_play_video);
        videoView=(VideoView)findViewById(R.id.videoView);
        videoView.setMediaController(new MediaController(this));
        Uri uri= Uri.parse("file:///sdcard/goodmm.mp4");
        videoView.setVideoURI(uri);
        new Thread(new Runnable() {
            @Override
            public void run() {
                SystemClock.sleep(5000);
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        videoView.setBackground(null);
                        videoView.start();
                    }
                });
            }
        }).start();
    }
}

7、activity_play_video_2.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_play_music"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <SurfaceView
        android:id="@+id/sfView"
        android:background="@drawable/bg"
        android:layout_width="match_parent"
        android:layout_height="260dp" />
    <SeekBar
        android:id="@+id/sb"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <Button
            android:text="播放"
            android:onClick="doPlay"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />
        <Button
            android:text="暂停"
            android:onClick="doPause"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />
        <Button
            android:text="停止"
            android:onClick="doStop"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />
    </LinearLayout>
</LinearLayout>

8、PlayVideo_2Activity.java

package com.example.android_media;

import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Environment;
import android.os.SystemClock;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.SeekBar;

import java.io.IOException;

public class PlayVideo_2Activity extends Activity {

    private MediaPlayer mp;
    private SurfaceView sfView;
    private SurfaceHolder holder;
    private SeekBar sb;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_play_video_2);

        sb=(SeekBar)findViewById(R.id.sb);
        sfView=(SurfaceView)findViewById(R.id.sfView);
        holder=sfView.getHolder();

        sb.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
            }
            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
            }
            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                if(mp!=null)
                    mp.seekTo(seekBar.getProgress());
            }
        });
    }

    boolean isRun=true;
    public void doPlay(View view){
        if(mp!=null)
            return;
        isRun=true;
        mp=new MediaPlayer();
        mp.reset();
        String path= Environment.getExternalStorageDirectory().getAbsolutePath()+"/goodmm.mp4";
        try {
            mp.setDataSource(path);//设置数据源
            mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
            mp.setDisplay(holder);//设置显示位置
            mp.prepare();
            sb.setMax(mp.getDuration());
            sfView.setBackground(null);
            mp.start();

            new Thread(new Runnable() {
                @Override
                public void run() {
                    while (isRun&&mp.getCurrentPosition()<=sb.getMax()){
                        sb.setProgress(mp.getCurrentPosition());
                        SystemClock.sleep(200);
                    }
                }
            }).start();

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void doPause(View view){
        if(mp==null)
            return;
        if(mp.isPlaying()){
            mp.pause();
            ((Button)view).setText("继续播放");
        }else{
            mp.start();
            ((Button)view).setText("暂停");
        }
    }

    public void doStop(View view){
        if(mp!=null&&mp.isPlaying()){
            isRun=false;
            mp.stop();
            mp.release();
            mp=null;
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        doStop(null);
    }
}

9、activity_recorder_video.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_recorder__video"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <SurfaceView
        android:id="@+id/sfView"
        android:layout_width="match_parent"
        android:layout_height="300dp" />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <Button
            android:text="开始录像"
            android:onClick="doStart"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />
        <Button
            android:text="停止录像"
            android:onClick="doStop"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />
        <Button
            android:text="播放录像"
            android:onClick="doPlay"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />
    </LinearLayout>

</LinearLayout>

10、Recorder_VideoActivity.java

package com.example.android_media;

import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;

import java.io.IOException;

public class Recorder_VideoActivity extends Activity {

    private MediaPlayer mp;
    private SurfaceView sfView;
    private SurfaceHolder holder;
    private MediaRecorder recorder;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recorder__video);
        sfView=(SurfaceView)findViewById(R.id.sfView);
        holder=sfView.getHolder();
    }

    //开始录像
    public void doStart(View view){
        recorder=new MediaRecorder();
        recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
        recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        recorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
        String path= Environment.getExternalStorageDirectory().getAbsolutePath()+"/luxiang.mp4";
        recorder.setOutputFile(path);
        recorder.setPreviewDisplay(holder.getSurface());
        try {
            recorder.prepare();
            recorder.start();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void doStop(View view){
        if(recorder!=null){
            try{
                recorder.stop();
            }catch (Exception ex){
                ex.printStackTrace();
            }
        }

    }

    public void doPlay(View view){
        if(mp!=null)
            return;
        mp=new MediaPlayer();
        mp.reset();
        String path= Environment.getExternalStorageDirectory().getAbsolutePath()+"/luxiang.mp4";
        try {
            mp.setDataSource(path);//设置数据源
            mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
            mp.setDisplay(holder);//设置显示位置
            mp.prepare();
            sfView.setBackground(null);
            mp.start();
        }catch (Exception ex){
            ex.printStackTrace();
        }

    }
}

11、activity_recorder.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_recorder"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:text="开始录音"
        android:onClick="doStart"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <Button
        android:text="结束录音"
        android:onClick="doStart"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <Button
        android:text="播放录音"
        android:onClick="doPlay"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

12、RecorderActivity.java

package com.example.android_media;

import android.app.Activity;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;

import java.io.IOException;

public class RecorderActivity extends Activity {

    private MediaRecorder recorder;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recorder);
    }

    //开始录音
    public void doStart(View view){
        if(recorder!=null)
            return;
        recorder=new MediaRecorder();//构建了一个录音设备
        recorder.setAudioSource(MediaRecorder.AudioSource.MIC);//设置声音来源
        recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);//设置录音文件格式
        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);//设置声音编码类型
        String path= Environment.getExternalStorageDirectory().getAbsolutePath()+"/luyin.3gp";
        recorder.setOutputFile(path);//设置输出文件位置
        try {
            recorder.prepare();//录音设备就绪
            recorder.start();//开始录音
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    //录音结束
    public void doStop(View view){
        if(recorder!=null){
            recorder.stop();
            recorder.release();
            recorder=null;
        }
    }

    //播放录音
    MediaPlayer mp;
    public void doPlay(View view){
        if(mp!=null)
            return;
        mp=new MediaPlayer();
        mp.reset();
        String path= Environment.getExternalStorageDirectory().getAbsolutePath()+"/luyin.3gp";
        try {
            mp.setDataSource(path);
            mp.prepare();
            mp.start();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        doStop(null);
    }
}

13、AndroidManifest.xml

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

    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.CAMERA" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".PlayMusicActivity" />
        <activity android:name=".PlayVideoActivity" />
        <activity android:name=".PlayVideo_2Activity" />
        <activity android:name=".RecorderActivity" />
        <activity android:name=".Recorder_VideoActivity"></activity>
    </application>

</manifest>

14、bg.png