问题

I want to make a app in which I have to open only front camera, How can i do it using intent?

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);
}

回答1:

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);

Other/Alternate Solution

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;
}

add these permissions in the AndroidManifest.xml file

<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" />

only available in Gingerbread(2.3) and Up Android Version.

otherwise you can also check these example

1. android-Camera2Basic

2. Camera Example 2

3. Vogella example

hope it helps you..

回答2:

Standard Android Camera

Using Intent you open the standard android camera application.

Never use android.intent.extras.CAMERA_FACING property - this is an undocumented feature that stopped working starting from some of the android versions.

Camera API

To open a front camera you should use Camera API - do things like choosing the front camera, showing a preview in a view, and taking pictures manually. Answer of @skydroid shows how to find the front camera. Note that Camera.open() doesn't open a camera for the user as you might expect, you should manually show the preview.

Also note, since API level 21 the Camera API is deprecated and docs recommend to use Camera 2 API instead. But Camera API remains fully functional and you have no other choice if you want support older versions (< API level 21) as well.

回答3:

try this:

 Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
 intent.putExtra("android.intent.extras.CAMERA_FACING", 1);
                File outPutFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + Util.SD_CARD_PATH);
                if (!outPutFile.exists()) {
                    outPutFile.mkdirs();
                }
                capturedImageUri = Uri.fromFile(File.createTempFile("packagename" + System.currentTimeMillis(), ".jpg", outPutFile));

                intent.putExtra(MediaStore.EXTRA_OUTPUT, capturedImageUri);
                startActivityForResult(intent, Util.REQUEST_CAMERA);

来源：https://stackoverflow.com/questions/39423351/how-can-i-open-front-camera-using-intent-in-android

标签

android