您可以使用Surface创建自定义相机,并尝试此操作,希望结果符合您的要求。
public class MainActivity extends Activity implements SurfaceHolder.Callback {
Camera mCamera;
SurfaceView mPreview;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mPreview = (SurfaceView)findViewById(R.id.preview);
mPreview.getHolder().addCallback(this);
mPreview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mCamera = Camera.open();
}
@Override
public void onPause() {
super.onPause();
mCamera.stopPreview();
}
@Override
public void onDestroy() {
super.onDestroy();
mCamera.release();
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Parameters parameters = mCamera.getParameters();
List<Camera.Size> previewSizes = parameters.getSupportedPreviewSizes();
Camera.Size previewSize = previewSizes.get(4);
parameters.setPreviewSize(previewSize.width, previewSize.height);
parameters.setFlashMode(Parameters.FLASH_MODE_AUTO);
parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
mCamera.setParameters(parameters);
Display display = ((WindowManager)getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
if(display.getRotation() == Surface.ROTATION_0) {
mCamera.setDisplayOrientation(90);
} else if(display.getRotation() == Surface.ROTATION_270) {
mCamera.setDisplayOrientation(180);
}
mCamera.startPreview();
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(mPreview.getHolder());
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.i("PREVIEW","surfaceDestroyed");
}
}
您的XML文件应该长这样:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<SurfaceView
android:id="@+id/preview"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</FrameLayout>
<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="400px"
android:layout_marginTop="300px"
android:layout_marginStart="70px"
android:layout_marginEnd="70px"
android:background="@drawable/border" />
<RelativeLayout
android:id="@+id/rel_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</RelativeLayout>
</FrameLayout>
如果您的Android版本高于5.1,则需要在manifests.xml
中添加运行时权限,或者您可以手动从应用程序设置中授予权限。
<uses-feature android:name="android.hardware.camera" />
<uses-permission android:name="android.permission.CAMERA" />
and the response is above code (回应在上面的代码)
![enter image description here](https://istack.dev59.com/v4HAR.webp)
(图片链接)