如何将自定义相机应用程序设为默认应用程序？

Question

If I would use the following code:

Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePictureIntent,1);

it would start the default Android camera app right... I've written a custom camera app, but how do let Android know that it's a camera app, and that the user should be given the choice which Camera app to use.

In other words, if I used the code above, my app should start, and not the default android one.

Answer 1

but how do let Android know that it's a camera app, and that the user should be given the chose which Camera app to use.

Have an <intent-filter> on an <activity> for that action:

<intent-filter>
  <action android:name="android.media.action.IMAGE_CAPTURE" />
  <category android:name="android.intent.category.DEFAULT" />
</intent-filter>

The next time that somebody executes your above startActivityForResult() call, you will appear in the chooser alongside anything else that supports that Intent structure.