/** Toggle the Logs View visibility with a nice animation. */
public void toggleLogsView(boolean showView) {
final View logsView = findViewById(R.id.logs_layout);
final View bodyView = findViewById(R.id.container);
final FrameLayout.LayoutParams logsLayoutParams =
(FrameLayout.LayoutParams) logsView.getLayoutParams();
final int startLogsY, endLogsY, startBodyY, endBodyY;
if (showView) {
// The logsView height set in XML is a placeholder, we need to compute at runtime
// how much is 0.4 of the screen height.
int height = (int) (0.4 * mDrawerLayout.getHeight());
// The LogsView is hidden being placed off-screen with a negative bottomMargin.
// We need to update its height and bottomMargin to the correct runtime values.
logsLayoutParams.bottomMargin = -logsLayoutParams.height;
logsView.setLayoutParams(logsLayoutParams);
logsLayoutParams.height = height;
// Prepare the value for the Show animation.
startLogsY = logsLayoutParams.bottomMargin;
endLogsY = 0;
startBodyY = 0;
endBodyY = logsLayoutParams.height;
} else {
// Prepare the value for the Hide animation.
startLogsY = 0;
endLogsY = -logsLayoutParams.height;
startBodyY = logsLayoutParams.height;
endBodyY = 0;
}
final int deltaLogsY = endLogsY - startLogsY;
final int deltaBodyY = endBodyY - startBodyY;
Animation a =
new Animation() {
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
logsLayoutParams.bottomMargin = (int) (startLogsY + deltaLogsY * interpolatedTime);
logsView.setLayoutParams(logsLayoutParams);
bodyView.setPadding(0, 0, 0, (int) (startBodyY + deltaBodyY * interpolatedTime));
}
};
a.setDuration(500);
logsView.startAnimation(a);
}
