魔乐科技安卓开发教程----李兴华----13视频录制

1.录制视频

1、添加各种权限及横屏属性
//传感器决定
参考：
Activity的screenOrientation属性详解

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

同时在activity中添加各种权限的动态请求

private String permssionRequestCode []={Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.RECORD_AUDIO,
            Manifest.permission.MODIFY_AUDIO_SETTINGS,Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS,Manifest.permission.CAMERA};


private void requestPermission(){
    //动态请求各种权限
    ActivityCompat.requestPermissions(this,permssionRequestCode, 0);
    ActivityCompat.requestPermissions(this,permssionRequestCode, 1);
    ActivityCompat.requestPermissions(this,permssionRequestCode,2);
    ActivityCompat.requestPermissions(this,permssionRequestCode,3);
    ActivityCompat.requestPermissions(this,permssionRequestCode,4);

}

完整Manifest文件

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.fengray.myex027recordvideo">

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

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
    <uses-permission android:name="android.permission.RECORD_AUDIO"/>
    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"
        tools:ignore="ProtectedPermissions" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.CAMERA"/>

</manifest>

2、主布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <ImageButton
            android:id="@+id/record"
            android:src="@drawable/recode"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
        <ImageButton
            android:id="@+id/stop"
            android:src="@drawable/stop"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
        <ImageButton
            android:id="@+id/borowser"
            android:src="@drawable/filedir"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

    </LinearLayout>
    <TextView
        android:id="@+id/info"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="文字的提示信息"/>
    <SurfaceView
        android:id="@+id/surface"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</LinearLayout>

3、文件列表布局文件recode_files.xml

<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TableRow>
        <ImageView
            android:id="@+id/icon"
            android:src="@drawable/files"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
        <TextView
            android:id="@+id/filename"
            android:textSize="25px"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

    </TableRow>

</TableLayout>

4、视频预览列表布局文件browser.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <LinearLayout
        android:orientation="horizontal"
        android:gravity="center"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <TextView
            android:id="@+id/info"
            android:textSize="25sp"
            android:gravity="center_horizontal"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="视频文件列表"/>
        <ImageButton
            android:id="@+id/back"
            android:src="@drawable/back"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
    </LinearLayout>
    <ListView
        android:id="@+id/videoList"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</LinearLayout>

5、播放/停止布局文件player.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <LinearLayout
    android:orientation="horizontal"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
    <ImageButton
        android:id="@+id/player"
        android:src="@drawable/play"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
    <ImageButton
        android:id="@+id/stoper"
        android:src="@drawable/stop"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
    <ImageButton
        android:id="@+id/backer"
        android:src="@drawable/back"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    </LinearLayout>

    <SurfaceView
        android:id="@+id/surfaceview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</LinearLayout>

6、创建BrowerActivity

public class BrowserActivity extends AppCompatActivity {
    private ImageButton back=null;
    private ListView videoList=null;
    private SimpleAdapter adapter=null;//视频文件列表适配器
    private List<Map<String,Object>> recordFiles=null;//视频文件列表数据
    private String recDir="fengrayVido";//文件目录
    private File recordeVideoSaveFileDir=null;//视频保持路径
    private boolean sdcardExits=false;//sd卡存在标记


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.browser);
        back=findViewById(R.id.back);
        videoList=findViewById(R.id.videoList);

        //sd卡文件路径检查及目录创建
        if (this.sdcardExits= Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){//检测文件是否挂载
            recordeVideoSaveFileDir=new File(Environment.getExternalStorageDirectory().toString()
                    +File.separator+recDir+File.separator);

            if (!recordeVideoSaveFileDir.exists()){
                recordeVideoSaveFileDir.mkdirs();//创建文件夹
            }
        }

        back.setOnClickListener(new BackOnclickOnListenerImpl());
        //获取并显示文件列表
        getRecordefiles();

        //为浏览视频文件增加事件
        videoList.setOnItemClickListener(new VideoOnItemClickListenerImpl());
    }

    private class VideoOnItemClickListenerImpl implements AdapterView.OnItemClickListener{

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            if (adapter.getItem(position) instanceof  Map){
                Map<?,?> map= (Map<?, ?>) adapter.getItem(position);
                Intent intent=new Intent(BrowserActivity.this,PlayActivity.class);
                intent.putExtra("filepath",BrowserActivity.this.recordeVideoSaveFileDir.toString()
                +File.separator+map.get("filename"));
                startActivity(intent);
            }
        }
    }

    //获取录制的视频文件
    private void getRecordefiles(){
        //初始化List列表
        recordFiles=new ArrayList<>();
        if (sdcardExits){
            File files[]=recordeVideoSaveFileDir.listFiles();//获取路径下所有文件的对象数组
            //遍历files数组中的file对象并取其文件名，将文件名添加到List集合中
            for (int i = 0; i <files.length ; i++) {
                Map<String,Object> fileInfo=new HashMap<>();
                fileInfo.put("filename",files[i].getName());
                recordFiles.add(fileInfo);
            }
            //创建adpter对象
            adapter=new SimpleAdapter(BrowserActivity.this,recordFiles,R.layout.recode_files,
                    new String[]{"filename"},new int[]{R.id.filename});
            //为list设置adapter
            videoList.setAdapter(adapter);
        }
    }

    //后退时间处理
    private class BackOnclickOnListenerImpl implements View.OnClickListener {

        @Override
        public void onClick(View v) {
            Intent intent=new Intent(BrowserActivity.this,MainActivity.class);
            startActivity(intent);

        }
    }
}

7、创建plaerActivity

public class PlayActivity extends AppCompatActivity {
    private ImageButton player,stoper,backer;
    private MediaPlayer mediaPlayer=null;
    private SurfaceView surfaceView=null;
    private SurfaceHolder surfaceHolder=null;
    private String filepath=null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.player);
        filepath=getIntent().getStringExtra("filepath");

        player=findViewById(R.id.player);
        stoper=findViewById(R.id.stoper);
        backer=findViewById(R.id.backer);
        surfaceView=findViewById(R.id.surfaceview);


        surfaceHolder=surfaceView.getHolder();
        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        mediaPlayer=new MediaPlayer();
        mediaPlayer.reset();
        try {
            mediaPlayer.setDataSource(filepath);
        } catch (IOException e) {
            e.printStackTrace();
        }

        player.setOnClickListener(new PlayOnclickOnListenerImpl());
        stoper.setOnClickListener(new StoperOnclickOnListenerImpl());
        backer.setOnClickListener(new BackerOnclickOnListenerImpl());
    }

    //后退时间处理
    private class PlayOnclickOnListenerImpl implements View.OnClickListener {

        @Override
        public void onClick(View v) {
            mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
            mediaPlayer.setDisplay(surfaceHolder);
            try {
                mediaPlayer.prepare();
                mediaPlayer.start();
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    }

    private class StoperOnclickOnListenerImpl implements View.OnClickListener {

        @Override
        public void onClick(View v) {
            mediaPlayer.stop();

        }
    }

    private class BackerOnclickOnListenerImpl implements View.OnClickListener {

        @Override
        public void onClick(View v) {
            Intent intent=new Intent(PlayActivity.this,BrowserActivity.class);
            startActivity(intent);

        }
    }

    //响应按钮事件的回调方法
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode==KeyEvent.KEYCODE_BACK){
            mediaPlayer.stop();
            mediaPlayer.release();
            finish();
        }
        return false;
    }
}

8、主activity

public class MainActivity extends AppCompatActivity {
    private String permssionRequestCode []={Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.RECORD_AUDIO,
            Manifest.permission.MODIFY_AUDIO_SETTINGS,Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS,Manifest.permission.CAMERA};

    private ImageButton recorde,stop,brower;
    private TextView info=null;
    private MediaRecorder mediaRecorder=null;
    private boolean sdcardExits=false;//sd卡存在标记
    private File recordeVideoSaveFileDir=null;//视频保持路径
    private File recordeVideoSaveFile=null;//视频文件对象
    private String recordeVideoSaveFileName=null;//视频保存的名称
    private String recDir="fengrayVideo";//保存文件夹
    private boolean isRecord=false;
    private SurfaceView surface=null;

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

        //surface初始化
        surface.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        surface.getHolder().setFixedSize(480,800);
        //sd卡文件路径检查及目录创建
        if (this.sdcardExits= Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){//检测文件是否挂载
            recordeVideoSaveFileDir=new File(Environment.getExternalStorageDirectory().toString()+File.separator);

            if (!recordeVideoSaveFileDir.exists()){
                recordeVideoSaveFileDir.mkdirs();//创建文件夹
            }
        }
        //按钮点击监听
        recorde.setOnClickListener(new RecOnClickListenerImpl());
        stop.setOnClickListener(new StopOnClickListenerImpl());
        brower.setOnClickListener(new BroOnClickListenerImpl());

        //暂停停止按钮
        stop.setEnabled(false);

    }

    private class RecOnClickListenerImpl implements View.OnClickListener{

        @RequiresApi(api = Build.VERSION_CODES.O)
        @Override
        public void onClick(View v) {
            //确保sd卡存在
            if (sdcardExits){
              recordeVideoSaveFileName=recordeVideoSaveFileDir.toString()+File.separator+"fengrayvideo"
                      +System.currentTimeMillis()+".3gp";//录制后文件的路径
                recordeVideoSaveFile=new File(recordeVideoSaveFileName);
                //创建一个多媒体录制对象
                mediaRecorder=new MediaRecorder();
                mediaRecorder.reset();//重置一下对象

                //设置音频来源
                mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);//设置音频源
                mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);//设置视频源
                mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);//设置操作格式为3gp
                mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);//设置视频编码格式
                mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//设置音频编码格式
                mediaRecorder.setOutputFile(recordeVideoSaveFileName);//设置输出文件地址
                mediaRecorder.setVideoSize(320,240);//设置图像大小
                mediaRecorder.setVideoFrameRate(10);//设置帧率
                mediaRecorder.setPreviewDisplay(surface.getHolder().getSurface());//设置视频预览
                try {
                    mediaRecorder.prepare();//录制视频对象的准备
                } catch (IOException e) {
                    e.printStackTrace();
                }
                mediaRecorder.start();//开始录像
                info.setText("正在录像中……");//设置提示信息
                stop.setEnabled(true);//停止按钮可用
                recorde.setEnabled(false);//录制按钮不可用
                isRecord=true;//录音状态flag设置
            }
        }
    }

    private class StopOnClickListenerImpl implements View.OnClickListener{

        @Override
        public void onClick(View v) {
            if (isRecord){
                mediaRecorder.stop();//停止录制
                mediaRecorder.reset();//释放资源
                stop.setEnabled(false);//停止按钮不可用
                recorde.setEnabled(true);//录音录像按钮可用
                info.setText("录像结束，文件路径为："+recordeVideoSaveFile);

            }
        }
    }
    //浏览按钮响应事件
    private class BroOnClickListenerImpl implements View.OnClickListener{

        @Override
        public void onClick(View v) {
            Intent intent=new Intent(MainActivity.this,BrowserActivity.class);
            startActivity(intent);
        }
    }

    //响应按钮事件的回调方法
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode==KeyEvent.KEYCODE_BACK){
            finish();
        }
        return false;
    }

    //初始化各类组件
    private void init(){
        recorde=findViewById(R.id.record);
        stop=findViewById(R.id.stop);
        brower=findViewById(R.id.borowser);
        surface=findViewById(R.id.surface);
        info=findViewById(R.id.info);


    }

    //动态请求各种权限
    private void requestPermission(){
        //动态请求各种权限
        ActivityCompat.requestPermissions(this,permssionRequestCode, 0);
        ActivityCompat.requestPermissions(this,permssionRequestCode, 1);
        ActivityCompat.requestPermissions(this,permssionRequestCode,2);
        ActivityCompat.requestPermissions(this,permssionRequestCode,3);
        ActivityCompat.requestPermissions(this,permssionRequestCode,4);

    }
}

结果：
部分实现：没有完美实现


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