Android多媒体(视频播放器-拍照-录像)

视频播放器一：


1.布局文件：
<?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_main"
    android:layout_width="match_parent" android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context="com.asus.android_26_mediaplayer.MainActivity">


    <SurfaceView
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:id="@+id/sv_main_surface"/>


    <SeekBar
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/seekbar_main"
        />


    <ImageButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@android:drawable/ic_media_play"
        android:onClick="isPlay"
        android:layout_gravity="center_horizontal"
        />


</LinearLayout>


2.MainActivity:
package com.asus.android_26_mediaplayer;


import android.media.AudioManager;
import android.media.MediaPlayer;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.SurfaceView;
import android.view.View;
import android.widget.ImageButton;
import android.widget.SeekBar;


import java.io.IOException;


public class MainActivity extends AppCompatActivity {


    private MediaPlayer mediaPlayer;
    private SeekBar seekbar_main;
    private SurfaceView sv_main_surface;


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


        seekbar_main = (SeekBar) findViewById(R.id.seekbar_main);


        sv_main_surface = (SurfaceView) findViewById(R.id.sv_main_surface);


        //给滚动条设置滑动监听事件
        seekbar_main.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {


            }


            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {


            }


            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                //获取拖动结束时的位置
                int progress=seekbar_main.getProgress();
                //音乐随滚动条进度进行播放
                mediaPlayer.seekTo(progress);
            }
        });


    }


    public void isPlay(View view){


        final ImageButton imageButton= (ImageButton) view;


        if (mediaPlayer==null){
            //2.播放sd卡内音乐
            mediaPlayer = new MediaPlayer();
            //设置类型
            mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
            try {
                //设置音源
                mediaPlayer.setDataSource(this, Uri.parse("file://mnt/sdcard/Movies/sister.mp4"));
                //准备一下
                mediaPlayer.prepare();


                //将媒体播放器捕捉的视屏展示到SurfaceView
                mediaPlayer.setDisplay(sv_main_surface.getHolder());


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


            //播放音乐
            mediaPlayer.start();


            //将播放图标变为暂停图标
            imageButton.setImageResource(android.R.drawable.ic_media_pause);


            //获取音乐总时长
            int duration=mediaPlayer.getDuration();
            //设置进度条最大值为音乐总时长
            seekbar_main.setMax(duration);


            new MyThread().start();




        }else if (mediaPlayer.isPlaying()){
            //暂停音乐
            mediaPlayer.pause();
            //将暂停图标变为播放图标
            imageButton.setImageResource(android.R.drawable.ic_media_play);
        }else {
            mediaPlayer.start();
            //将播放图标变为暂停图标
            imageButton.setImageResource(android.R.drawable.ic_media_pause);
        }
    }


    //写一个线程，让进度条随音乐进度动起来
    class MyThread extends Thread{
        @Override
        public void run() {
            super.run();
            while (seekbar_main.getProgress()<=seekbar_main.getMax()){
                //获取当前音乐播放位置
                int currentPosition=mediaPlayer.getCurrentPosition();
                //让进度条动起来
                seekbar_main.setProgress(currentPosition);
            }
        }
    }


}
3.不要忘记配置权限：
<!-- 读取系统文件权限 -->
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />




视频播放器二：

1.布局文件：
由于引用的系统控制器，所以只需一个VideoView
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_video"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.asus.android_26_mediaplayer.VideoActivity">


    <VideoView
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:id="@+id/vv_main_video"/>


</RelativeLayout>


2.VideoActivity:
package com.asus.android_26_mediaplayer;


import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.MediaController;
import android.widget.VideoView;


public class VideoActivity extends AppCompatActivity {


    private VideoView vv_main_video;


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


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


        //给VideoView设置播放源
        vv_main_video.setVideoPath("file://mnt/sdcard/Movies/sister.mp4");


        MediaController controller=new MediaController(this);
        vv_main_video.setMediaController(controller);
        controller.setMediaPlayer(vv_main_video);
    }
}

完成以上步骤即可。

拍照：

1.布局文件

<?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_main"    android:layout_width="match_parent" android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:orientation="vertical"    tools:context="com.asus.android_27_camera.MainActivity">    <SurfaceView        android:layout_width="match_parent"        android:layout_height="match_parent"        android:id="@+id/sv_main_surface"        android:layout_weight="1"        />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="拍照"        android:onClick="photo"        android:layout_gravity="center_horizontal"        /></LinearLayout>

2.MainActivity：

package com.asus.android_27_camera;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.PixelFormat;import android.hardware.Camera;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.SurfaceHolder;import android.view.SurfaceView;import android.view.View;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;public class MainActivity extends AppCompatActivity {    private SurfaceView sv_main_surface;    private Camera camera;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        sv_main_surface = (SurfaceView) findViewById(R.id.sv_main_surface);        //给sv_main_surface添加回调函数        sv_main_surface.getHolder().addCallback(new SurfaceHolder.Callback() {            @Override            public void surfaceCreated(SurfaceHolder holder) {                //打开照相机                camera = Camera.open();                //设置参数                Camera.Parameters parameters=camera.getParameters();                //设置照片格式                parameters.setPictureFormat(PixelFormat.JPEG);                //设置照片的质量                parameters.set("jpeg-quality",85);                camera.setParameters(parameters);                try {                    camera.setPreviewDisplay(sv_main_surface.getHolder());                } catch (IOException e) {                    e.printStackTrace();                }                //开启预览效果                camera.startPreview();            }            @Override            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {            }            @Override            public void surfaceDestroyed(SurfaceHolder holder) {                if (camera!=null){                    camera.stopPreview();                    camera.release();                    camera=null;                }            }        });    }    public void photo(View view){        camera.takePicture(null,null, new Camera.PictureCallback() {            @Override            public void onPictureTaken(byte[] data, Camera camera) {                //图片压缩                Bitmap bitmap=BitmapFactory.decodeByteArray(data,0,data.length);                //图片压缩路径                try {                    FileOutputStream fos=new FileOutputStream("mnt/sdcard/G150820_"+System.currentTimeMillis()+".jpeg");                    //图片压缩的格式，质量及路径                    bitmap.compress(Bitmap.CompressFormat.JPEG,85,fos);                    camera.stopPreview();                    camera.startPreview();                } catch (FileNotFoundException e) {                    e.printStackTrace();                }            }        });    }}

3.配置权限

<!-- 打开相机权限 --><uses-permission android:name="android.permission.CAMERA" /><!-- 创建文件权限 --><uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" /><!-- 写入内存卡权限 --><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

录像（录音）：

1布局文件：

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_recorder"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.asus.android_27_camera.RecorderActivity">    <SurfaceView        android:layout_width="match_parent"        android:layout_height="match_parent"        android:id="@+id/sv_recorder_surface"        />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:onClick="start"        android:id="@+id/bt_start"        android:text="开始"        />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:onClick="stop"        android:layout_below="@+id/bt_start"        android:text="结束"        /></RelativeLayout>

2.RecorderActivity：

package com.asus.android_27_camera;import android.media.MediaRecorder;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.SurfaceView;import android.view.View;import java.io.IOException;public class RecorderActivity extends AppCompatActivity {    private SurfaceView sv_recorder_surface;    private MediaRecorder recorder;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_recorder);        sv_recorder_surface = (SurfaceView) findViewById(R.id.sv_recorder_surface);        //实例化媒体录制器        recorder = new MediaRecorder();    }    public void start(View view) throws IOException {        //从照相机采集视频        recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);        //从麦克风采集录音        recorder.setAudioSource(MediaRecorder.AudioSource.MIC);        //设置格式        recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);        //设置视频编码方式        recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);        //设置录音编码方式        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);        //设置保存路径        recorder.setOutputFile("/mnt/sdcard/G150820_"+System.currentTimeMillis()+".mp4");        //画面展示出来        recorder.setPreviewDisplay(sv_recorder_surface.getHolder().getSurface());        //准备        recorder.prepare();        //开始录制        recorder.start();    }    public void stop(View view){        if (recorder!=null){            recorder.stop();            recorder.release();;            recorder=null;        }    }}
3.配置权限：

<!--录音的权限-->    <uses-permission android:name="android.permission.RECORD_AUDIO"/>