android实现录屏功能

package com.fpt.screenvideo;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.media.projection.MediaProjectionManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.RadioGroup;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private Button mTextView,off_btn;
private static final String RECORD_STATUS = "record_status";
private static final int REQUEST_CODE = 1000;
private int mScreenWidth;
private int mScreenHeight;
private int mScreenDensity;
/** 是否已经开启视频录制 */
private boolean isStarted = false;
/** 是否为标清视频 */
private boolean isVideoSd = true;
/** 是否开启音频录制 */
private boolean isAudio = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.i(TAG, "onCreate");
if(savedInstanceState != null) {
isStarted = savedInstanceState.getBoolean(RECORD_STATUS);
}
getView() ;
getScreenBaseInfo();
}
private void getView() {
mTextView = findViewById(R.id.button_control);
off_btn=findViewById(R.id.button_contro2);
off_btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
////    Intent service = new Intent(this, ScreenRecordService.class);
//    stopService(service);
//    isStarted = !isStarted;
}
});
if(isStarted) {
statusIsStarted();
} else {
statusIsStoped();
}
mTextView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(isStarted) {
stopScreenRecording();//功能
statusIsStoped();//仅仅是状态
Log.i(TAG, "Stoped screen recording");
} else {
startScreenRecording();//功能
}
}
});
RadioGroup radioGroup = (RadioGroup) findViewById(R.id.redio_group);
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
switch (checkedId) {
case R.id.sd_button:
isVideoSd = true;
break;
case R.id.hd_button:
isVideoSd = false;
break;
default:
break;
}
}
});
CheckBox audioBox = (CheckBox) findViewById(R.id.audio_check_box);
audioBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
isAudio = isChecked;
}
});
}
/**
* 开启屏幕录制时的UI状态
*/
private void statusIsStarted() {
mTextView.setText("停止录制");
mTextView.setBackgroundColor(Color.GREEN);
}
/**
* 结束屏幕录制后的UI状态
*/
private void statusIsStoped() {
mTextView.setText("开始录制");
mTextView.setBackgroundColor(Color.RED);
}
/**
* 获取屏幕相关数据
*/
private void getScreenBaseInfo() {
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
mScreenWidth = metrics.widthPixels;
mScreenHeight = metrics.heightPixels;
mScreenDensity = metrics.densityDpi;
}
@Override
protected void onSaveInstanceState(Bundle outState) {
// TODO Auto-generated method stub
super.onSaveInstanceState(outState);
outState.putBoolean(RECORD_STATUS, isStarted);
}
/**
* 获取屏幕录制的权限
*/
private void startScreenRecording() {
// TODO Auto-generated method stub
MediaProjectionManager mediaProjectionManager = (MediaProjectionManager) getSystemService(Context.MEDIA_PROJECTION_SERVICE);
Intent permissionIntent = mediaProjectionManager.createScreenCaptureIntent();
startActivityForResult(permissionIntent, REQUEST_CODE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == REQUEST_CODE) {
if(resultCode == RESULT_OK) {
// 获得权限，启动Service开始录制
Intent service = new Intent(this, ScreenRecordService.class);
service.putExtra("code", resultCode);
service.putExtra("data", data);
service.putExtra("audio", isAudio);
service.putExtra("width", mScreenWidth);
service.putExtra("height", mScreenHeight);
service.putExtra("density", mScreenDensity);
service.putExtra("quality", isVideoSd);
startService(service);
// 已经开始屏幕录制，修改UI状态
isStarted = !isStarted;
statusIsStarted();
//    simulateHome(); // this.finish(); // 可以直接关闭Activity
Log.i(TAG, "Started screen recording");
} else {
Toast.makeText(this, "跳出提示框", Toast.LENGTH_LONG).show();
Log.i(TAG, "User cancelled");
}
}
}
/**
* 关闭屏幕录制，即停止录制Service
*/
private void stopScreenRecording() {
// TODO Auto-generated method stub
Intent service = new Intent(this, ScreenRecordService.class);
stopService(service);
isStarted = !isStarted;
}
/**
* 模拟HOME键返回桌面的功能
*/
private void simulateHome() {
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addCategory(Intent.CATEGORY_HOME);
this.startActivity(intent);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// 在这里将BACK键模拟了HOME键的返回桌面功能（并无必要）
if(keyCode == KeyEvent.KEYCODE_BACK) {
simulateHome();
return true;
}
return super.onKeyDown(keyCode, event);
}
}

package com.fpt.screenvideo;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.hardware.display.DisplayManager;
import android.hardware.display.VirtualDisplay;
import android.media.MediaRecorder;
import android.media.projection.MediaProjection;
import android.media.projection.MediaProjectionManager;
import android.os.Environment;
import android.os.IBinder;
import android.util.Log;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
public class ScreenRecordService extends Service {
private static final String TAG = "ScreenRecordingService";
private int mScreenWidth;
private int mScreenHeight;
private int mScreenDensity;
private int mResultCode;
private Intent mResultData;
/** 是否为标清视频 */
private boolean isVideoSd;
/** 是否开启音频录制 */
private boolean isAudio;
private MediaProjection mMediaProjection;
private MediaRecorder mMediaRecorder;
private VirtualDisplay mVirtualDisplay;
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
Log.i(TAG, "Service onCreate() is called");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// TODO Auto-generated method stub
Log.i(TAG, "Service onStartCommand() is called");
mResultCode = intent.getIntExtra("code", -1);
mResultData = intent.getParcelableExtra("data");
mScreenWidth = intent.getIntExtra("width", 720);
mScreenHeight = intent.getIntExtra("height", 1280);
mScreenDensity = intent.getIntExtra("density", 1);
isVideoSd = intent.getBooleanExtra("quality", true);
isAudio = intent.getBooleanExtra("audio", true);
mMediaProjection = createMediaProjection();
mMediaRecorder = createMediaRecorder();
mVirtualDisplay = createVirtualDisplay(); // 必须在mediaRecorder.prepare() 之后调用，否则报错"fail to get surface"
mMediaRecorder.start();
return Service.START_NOT_STICKY;
}
private MediaProjection createMediaProjection() {
Log.i(TAG, "Create MediaProjection");
return ((MediaProjectionManager) getSystemService(Context.MEDIA_PROJECTION_SERVICE)).getMediaProjection(mResultCode, mResultData);
}
private MediaRecorder createMediaRecorder() {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
Date curDate = new Date(System.currentTimeMillis());
String curTime = formatter.format(curDate).replace(" ", "");
String videoQuality = "HD";
if(isVideoSd) videoQuality = "SD";
Log.i(TAG, "Create MediaRecorder");
MediaRecorder mediaRecorder = new MediaRecorder();
//  if(isAudio) mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mediaRecorder.setOutputFile(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES) + "/" + videoQuality + curTime + ".mp4");
mediaRecorder.setVideoSize(mScreenWidth, mScreenHeight); //after setVideoSource(), setOutFormat()
mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264); //after setOutputFormat()
//  if(isAudio) mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC); //after setOutputFormat()
int bitRate;
if(isVideoSd) {
mediaRecorder.setVideoEncodingBitRate(mScreenWidth * mScreenHeight);
mediaRecorder.setVideoFrameRate(30);
bitRate = mScreenWidth * mScreenHeight / 1000;
} else {
mediaRecorder.setVideoEncodingBitRate(5 * mScreenWidth * mScreenHeight);
mediaRecorder.setVideoFrameRate(60); //after setVideoSource(), setOutFormat()
bitRate = 5 * mScreenWidth * mScreenHeight / 1000;
}
try {
mediaRecorder.prepare();
} catch (IllegalStateException | IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Log.i(TAG, "Audio: " + isAudio + ", SD video: " + isVideoSd + ", BitRate: " + bitRate + "kbps");
return mediaRecorder;
}
private VirtualDisplay createVirtualDisplay() {
Log.i(TAG, "Create VirtualDisplay");
return mMediaProjection.createVirtualDisplay(TAG, mScreenWidth, mScreenHeight, mScreenDensity,
DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR, mMediaRecorder.getSurface(), null, null);
}
@Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
Log.i(TAG, "Service onDestroy");
if(mVirtualDisplay != null) {
mVirtualDisplay.release();
mVirtualDisplay = null;
}
if(mMediaRecorder != null) {
mMediaRecorder.setOnErrorListener(null);
mMediaProjection.stop();
mMediaRecorder.reset();
}
if(mMediaProjection != null) {
mMediaProjection.stop();
mMediaProjection = null;
}
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
}

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

<service android:name=".ScreenRecordService"/