choiboi

// Overriden onClick method. This method will invoke for buttons that has been set with the on click listener
// with this class.
@Override
public void onClick(View v) {
    Toast.makeText(this, "Button listener implemented through this class pressed!", Toast.LENGTH_LONG).show();
}

choiboi

<!-- Must have onClick attribute with the method name as the value. -->
<Button
    android:id="@+id/button_xml_attribute"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/button_xml_attribute_text"
    android:onClick="onButtonPressed" />

choiboi

// This method will invoke with the button that has the xml attribute onClick set with this method name.
public void onButtonPressed(View v) {
    Toast.makeText(this, "Button listener implemented xml onClick attribute!", Toast.LENGTH_LONG).show();
}

choiboi

// Button listener implemented by not implmenting this class with
// OnClickListener. When button is pressed, it will invoke the onClick method
// inside the OnClickListener object created when the listener has been set.
Button implementListenerButton = (Button) findViewById(R.id.button_object_onclicklistener);
implementListenerButton.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View arg0) {
        Toast.makeText(ButtonMainActivity.this, "Button listener created while setting the button listener pressed!", Toast.LENGTH_LONG).show();
    }
});

choiboi

/*
 * Using the Intent data that the Gallery app returns, this method will
 * retrive the filepath location of the image that the user have
 * selected.
 * 
 * Known issues: This does not work for getting images from Google Drive and
 *               Pisca. 
 */
public String getGalleryImagePath(Intent data) {
  Uri imgUri = data.getData();

choiboi

// Start intent to get image using using any image viewing app available on the device.
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent, GALLERY_CHOOSER_INTENT);

choiboi

// Start intent to get image using device's default gallery app.
Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, GALLERY_INTENT);

choiboi

if (resultCode == RESULT_OK) {
  ...
  else if (requestCode == CAMERA_WITH_FILEPATH) {
    // Get the image from the filepath you specified when you
    // started the camera intent.
    String filepath = getOutputLink(TEMP_JPEG_FILENAME);
    Bitmap img = BitmapFactory.decodeFile(filepath);
    mImage.setImageBitmap(img);
    Toast.makeText(this, "Image is saved in: " + filepath, Toast.LENGTH_SHORT).show();
  }

choiboi

// Create a new File object with specified filepath, where the
// captured image will be located.
File file = new File(getOutputLink(TEMP_JPEG_FILENAME));
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
startActivityForResult(cameraIntent, CAMERA_WITH_FILEPATH);

choiboi

/*
 * Creates a new file path into the standard Android pictures directory.
 */
private String getOutputLink(String filename) {
  String directory = "";

  // Check if storage is mounted.
  if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
    File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), 
                                            getResources().getString(R.string.app_name));