Android TextureView+SurfaceTexture实现相机预览
Posted 王睿丶
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androidManifest.xml
<uses-permission android:name="android.permission.RECORD_AUDIO"/><!--音频录制权限-->
<uses-permission android:name="android.permission.CAMERA"/><!--摄像头权限-->
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/><!--存储权限-->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
MainActivity .java
import android.Manifest;
import android.graphics.SurfaceTexture;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.Gravity;
import android.view.TextureView;
import android.view.View;
import android.widget.FrameLayout;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import java.io.IOException;
public class MainActivity extends AppCompatActivity implements TextureView.SurfaceTextureListener
private Camera mCamera;
private TextureView mTextureView;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
/**
* 在 Android 6.0 以上需要动态添加权限
*/
ActivityCompat.requestPermissions(this,
new String[]Manifest.permission.CAMERA,Manifest.permission.RECORD_AUDIO,
100);
mTextureView = new TextureView(this);
mTextureView.setSurfaceTextureListener(this);
mTextureView.setScaleX(-1f);
setContentView(mTextureView);
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)
mCamera = Camera.open(1);
Camera.Size previewSize = mCamera.getParameters().getPreviewSize();
mTextureView.setLayoutParams(new FrameLayout.LayoutParams(
previewSize.width, previewSize.height, Gravity.CENTER));
try
mCamera.setPreviewTexture(surface);
catch (IOException t)
mCamera.startPreview();
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height)
// Ignored, the Camera does all the work for us
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface)
mCamera.stopPreview();
mCamera.release();
return true;
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface)
// Update your view here!
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