android 录像机

实例介绍

【实例简介】

【实例截图】

【核心代码】

package zyf.demo.moviedemo;
 
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileFilter;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.UUID;
 
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.util.Log;
import android.view.Menu;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.Window;
import android.view.WindowManager;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
 
public class MainActivity extends Activity {
    private static final String LOG_TAG = MainActivity.class.getSimpleName();
 
    MoviePlayer mPlayer;
    MovieRecorder mRecorder;
 
    Button btnRecoder;
 
    ListView mListView1;
    SurfaceView surfaceView;
    SurfaceHolder surfaceHolder;
    MyAdatpter myAdapter;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
 
        requestWindowFeature(Window.FEATURE_NO_TITLE);// 去掉标题栏
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);// 设置全屏
        // 设置横屏显示
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        // 选择支持半透明模式,在有surfaceview的activity中使用。
        getWindow().setFormat(PixelFormat.TRANSLUCENT);
 
        setContentView(R.layout.activity_main);
 
        btnRecoder = (Button) findViewById(R.id.btnRecoder);
        btnRecoder.setOnClickListener(mRecordingClick);
 
        surfaceView = (SurfaceView) findViewById(R.id.surfaceView1);
        surfaceHolder = surfaceView.getHolder();
        surfaceHolder.addCallback(surfaceHolderCallback); // holder加入回调接口
        // setType必须设置，要不出错.
        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
 
        mPlayer = new MoviePlayer();
        mRecorder = new MovieRecorder();
 
        mListView1 = (ListView) findViewById(R.id.listView1);
        myAdapter = new MyAdatpter();
        mListView1.setAdapter(myAdapter);
        mListView1
                .setOnItemClickListener(new AdapterView.OnItemClickListener() {
 
                    @Override
                    public void onItemClick(AdapterView<?> arg0, View arg1,
                            int arg2, long arg3) {
                        File f = myAdapter.lst[arg2];
                        mPlayer.play(f.getAbsolutePath(),
                                surfaceView);
                    }
                });
 
        refreshViewByRecordingState();
    }
 
    protected void onDestroy() {
        if (mRecorder != null) {
            mRecorder.release();
        }
        if (mPlayer != null) {
            mPlayer.release();
        }
        super.onDestroy();
    };
 
    Callback surfaceHolderCallback = new Callback() {
 
        @Override
        public void surfaceDestroyed(SurfaceHolder arg0) {
            surfaceView = null;
            surfaceHolder = null;
            mRecorder = null;
        }
 
        @Override
        public void surfaceCreated(SurfaceHolder arg0) {
            // TODO Auto-generated method stub
            surfaceHolder = arg0;
        }
 
        @Override
        public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2,
                int arg3) {
            // TODO Auto-generated method stub
            surfaceHolder = arg0;
        }
    };
 
    OnClickListener mRecordingClick = new OnClickListener() {
 
        @Override
        public void onClick(View arg0) {
            if (!mRecorder.isRecording) {
                mRecorder.startRecording(surfaceView);
 
                mRecorder.isRecording = true;
                btnRecoder.setText("录制中，单击停止");
            } else {
                mRecorder.stopRecording();
 
                mRecorder.isRecording = false;
                btnRecoder.setText("录制录音，单击开始");
 
                refreshViewByRecordingState();
            }
 
        }
    };
 
 
     
    /* 刷新状态 */
    protected void refreshViewByRecordingState() {
        if (mRecorder.isRecording) {
            mRecorder.isRecording = true;
            btnRecoder.setText("录制中，单击停止");
        } else {
            mRecorder.isRecording = false;
            btnRecoder.setText("准备录制，单击开始");
        }
 
        myAdapter.query();
        myAdapter.notifyDataSetChanged();
    }
 
    class MyAdatpter extends BaseAdapter {
        File[] lst;
 
        public MyAdatpter() {
            super();
            query();
        }
 
        public void query() {
            String mFileName = Environment.getExternalStorageDirectory()
                    .getAbsolutePath();
            File f = new File(mFileName);
            File[] found = f.listFiles(new FileFilter() {
 
                @Override
                public boolean accept(File pathname) {
                    if (pathname.getName().startsWith("mov_")) {
                        return true;
                    }
                    return false;
                }
            });
 
            lst = new File[found.length];
            for (int i = 0; i < found.length; i  ) {
                lst[i] = found[found.length - i - 1];
            }
        }
 
        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return lst == null ? 0 : lst.length;
        }
 
        @Override
        public Object getItem(int arg0) {
            // TODO Auto-generated method stub
            return null;
        }
 
        @Override
        public long getItemId(int arg0) {
            // TODO Auto-generated method stub
            return 0;
        }
 
        @Override
        public View getView(int arg0, View arg1, ViewGroup arg2) {
            View v = getLayoutInflater().inflate(R.layout.item, null);
            TextView txtText = (TextView) v.findViewById(R.id.txtText);
            TextView txtSize = (TextView) v.findViewById(R.id.txtSize);
 
            File f = lst[arg0];
            txtText.setText(f.getName());
            txtSize.setText(f.length() / 1024   " kb");
 
            return v;
        }
 
    }
}

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