1/* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.example.android.support.transition.widget; 18 19import android.os.Bundle; 20import android.view.Gravity; 21import android.view.View; 22import android.widget.FrameLayout; 23 24import androidx.interpolator.view.animation.FastOutSlowInInterpolator; 25import androidx.transition.ArcMotion; 26import androidx.transition.ChangeBounds; 27import androidx.transition.Transition; 28import androidx.transition.TransitionManager; 29 30import com.example.android.support.transition.R; 31 32/** 33 * This demonstrates usage of {@link ArcMotion}. 34 */ 35public class ArcMotionUsage extends TransitionUsageBase { 36 37 private FrameLayout mRoot; 38 private View mTarget; 39 private Transition mTransition; 40 41 @Override 42 int getLayoutResId() { 43 return R.layout.arc_motion; 44 } 45 46 @Override 47 protected void onCreate(Bundle savedInstanceState) { 48 super.onCreate(savedInstanceState); 49 mRoot = findViewById(R.id.root); 50 mTarget = findViewById(R.id.target); 51 mTransition = new ChangeBounds(); 52 mTransition.setPathMotion(new ArcMotion()); 53 mTransition.setInterpolator(new FastOutSlowInInterpolator()); 54 mTransition.setDuration(500); 55 findViewById(R.id.move).setOnClickListener(new View.OnClickListener() { 56 @Override 57 public void onClick(View v) { 58 TransitionManager.beginDelayedTransition(mRoot, mTransition); 59 FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) mTarget.getLayoutParams(); 60 if ((lp.gravity & Gravity.START) == Gravity.START) { 61 lp.gravity = Gravity.END | Gravity.BOTTOM; 62 } else { 63 lp.gravity = Gravity.START | Gravity.TOP; 64 } 65 mTarget.setLayoutParams(lp); 66 } 67 }); 68 } 69 70} 71