我想制作一个仅需打开前置摄像头的应用程序,我该如何使用intent进行操作?

private void captureImage() {
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

    fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);

    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
    intent.putExtra("android.intent.extras.CAMERA_FACING", 1);

    // start the image capture Intent
    startActivityForResult(intent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE);
}

最佳答案

Java

    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    Uri photoUri = Uri.fromFile(getOutputPhotoFile());
    intent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);
    intent.putExtra("android.intent.extras.CAMERA_FACING", 1);
    startActivityForResult(intent, CAMERA_PHOTO_REQUEST_CODE);

其他/替代解决方案
private Camera openFrontFacingCameraGingerbread() {
    int cameraCount = 0;
    Camera cam = null;
    Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
    cameraCount = Camera.getNumberOfCameras();
    for (int camIdx = 0; camIdx < cameraCount; camIdx++) {
        Camera.getCameraInfo(camIdx, cameraInfo);
        if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
            try {
                cam = Camera.open(camIdx);
            } catch (RuntimeException e) {
                Log.e(TAG, "Camera failed to open: " + e.toString());
            }
        }
    }

    return cam;
}

AndroidManifest.xml文件中添加这些权限
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" android:required="false" />
<uses-feature android:name="android.hardware.camera.front" android:required="false" />



否则,您也可以查看这些示例

1. android-Camera2Basic

2. Camera Example 2

3. Vogella example

希望对您有帮助。

10-07 19:14
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