Android录屏代码
时间: 2023-09-18 12:06:01 浏览: 67
### 回答1:
以下是一个简单的 Android 录屏代码示例:
```
MediaRecorder mediaRecorder = new MediaRecorder();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
mediaRecorder.setVideoEncodingBitRate(512 * 1000);
mediaRecorder.setVideoFrameRate(30);
mediaRecorder.setVideoSize(1280, 720);
mediaRecorder.setOutputFile("/sdcard/demo.mp4");
mediaRecorder.prepare();
mediaRecorder.start();
```
请注意,这只是一个简单的示例,实际上,录屏代码可能会更加复杂,需要根据具体的需求进行调整。
### 回答2:
Android录屏的代码可以使用MediaProjectionManager和MediaProjection来实现。首先,在AndroidManifest.xml文件中添加以下权限:
```xml
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
```
然后,在Activity中创建以下成员变量:
```java
private MediaProjectionManager mediaProjectionManager;
private MediaProjection mediaProjection;
private VirtualDisplay virtualDisplay;
private MediaRecorder mediaRecorder;
private int screenDensity;
```
接下来,在Activity的onCreate方法中,初始化上述变量并获取MediaProjectionManager:
```java
mediaProjectionManager = (MediaProjectionManager) getSystemService(Context.MEDIA_PROJECTION_SERVICE);
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
screenDensity = metrics.densityDpi;
```
然后,在想要开始录屏的地方,启动一个Activity来请求录屏权限:
```java
Intent intent = mediaProjectionManager.createScreenCaptureIntent();
startActivityForResult(intent, REQUEST_CODE);
```
在Activity的onActivityResult方法中,获取MediaProjection对象:
```java
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
mediaProjection = mediaProjectionManager.getMediaProjection(resultCode, data);
startRecording();
}
}
```
接下来,编写startRecording方法来开始录屏:
```java
private void startRecording() {
mediaRecorder = new MediaRecorder();
try {
virtualDisplay = mediaProjection.createVirtualDisplay("ScreenRecording",
metrics.widthPixels, metrics.heightPixels, screenDensity,
DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,
mediaRecorder.getSurface(), null, null);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
mediaRecorder.setVideoSize(metrics.widthPixels, metrics.heightPixels);
String videoFilePath = getExternalFilesDir(null) + "/screen_record.mp4";
mediaRecorder.setOutputFile(videoFilePath);
mediaRecorder.setVideoEncodingBitRate(10000000);
mediaRecorder.setVideoFrameRate(30);
mediaRecorder.prepare();
mediaRecorder.start();
} catch (IOException e) {
e.printStackTrace();
}
}
```
最后,在想要停止录屏的地方,调用stopRecording方法:
```java
private void stopRecording() {
mediaRecorder.stop();
mediaRecorder.release();
mediaProjection.stop();
virtualDisplay.release();
}
```
这样,就可以实现Android录屏的代码了。
### 回答3:
Android录屏功能是通过使用MediaProjection API来实现的。下面是一个简单的示例代码:
首先,在AndroidManifest.xml文件中添加使用屏幕录制功能所需的权限:
```xml
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
```
然后,在Activity中请求屏幕录制权限:
```java
private static final int REQUEST_CODE = 1;
private MediaProjectionManager mProjectionManager;
private MediaProjection mMediaProjection;
private VirtualDisplay mVirtualDisplay;
private MediaRecorder mMediaRecorder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// ...
mProjectionManager = (MediaProjectionManager) getSystemService(Context.MEDIA_PROJECTION_SERVICE);
startActivityForResult(mProjectionManager.createScreenCaptureIntent(), REQUEST_CODE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
mMediaProjection = mProjectionManager.getMediaProjection(resultCode, data);
startRecording();
}
}
```
接下来是开始录制和停止录制的方法:
```java
private void startRecording() {
mMediaRecorder = new MediaRecorder();
mVirtualDisplay = mMediaProjection.createVirtualDisplay("ScreenRecording",
mScreenDensity, mScreenWidth, mScreenHeight,
DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,
mMediaRecorder.getSurface(), null, null);
mMediaRecorder.start();
}
private void stopRecording() {
if (mMediaRecorder != null) {
mMediaRecorder.stop();
mMediaRecorder.reset();
mMediaRecorder.release();
}
if (mVirtualDisplay != null) {
mVirtualDisplay.release();
}
if (mMediaProjection != null) {
mMediaProjection.stop();
}
}
```
值得注意的是,停止录制后还需要调用mMediaRecorder.release()、mVirtualDisplay.release()和mMediaProjection.stop()释放资源。
以上就是一个简单的Android录屏代码示例,只需一个请求权限的操作和两个方法即可完成屏幕录制功能。当然,根据需求,可以进行更多的设置和改进。