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[英]Android camera2: how ho to get Image from a defined cameraId?
[英]How to get an Android camera image with Camera2
安卓:有什么問題嗎? 我正在嘗試使用 CAMERA2 從我的 Android 相機中獲取照片,但無法正常工作。 我只需要從我的相機獲取視頻流並將其顯示在屏幕上。 代碼主要活動:
public class MainActivity extends AppCompatActivity {
private CameraManager cameraManager = null;
private TextureView textureView = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textureView = (TextureView) findViewById(R.id.textureView);
cameraManager = (CameraManager) getSystemService(CAMERA_SERVICE);
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
@Override
protected void onResume() {
super.onResume();
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
return;
}
try {
cameraManager.openCamera(cameraManager.getCameraIdList()[0], new CameraDevice.StateCallback() {
@Override
public void onOpened(@NonNull CameraDevice camera) {
CaptureRequest.Builder builder = null;
try {
builder = camera.createCaptureRequest(CameraDevice.TEMPLATE_RECORD);
} catch (CameraAccessException e) {
e.printStackTrace();
}
if(builder != null)
if(textureView != null)
builder.addTarget(new Surface(textureView.getSurfaceTexture()));
else onClosed(camera);
}
@Override
public void onDisconnected(@NonNull CameraDevice camera) {
}
@Override
public void onError(@NonNull CameraDevice camera, int error) {
}
}, new Handler(getApplicationContext().getMainLooper()));
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
請幫忙
請查看 camera2 的示例視頻捕獲應用程序: https ://github.com/googlesamples/android-Camera2Video
您當前的代碼永遠不會使用您的 TextureView 創建相機捕獲會話,並且您也永遠不會向該會話提交重復的捕獲請求。 查看示例以了解它是如何設置相機的。
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