1 /* 2 * Copyright 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 17 package com.example.android.support.transition.widget; 18 19 import android.os.Bundle; 20 import android.view.Gravity; 21 import android.view.View; 22 import android.widget.LinearLayout; 23 24 import androidx.transition.AutoTransition; 25 import androidx.transition.SidePropagation; 26 import androidx.transition.Transition; 27 import androidx.transition.TransitionManager; 28 29 import com.example.android.support.transition.R; 30 31 /** 32 * Demonstrates usage of Slide. 33 */ 34 public class SidePropagationUsage extends TransitionUsageBase { 35 36 private Transition mTransition; 37 38 private LinearLayout mRoot; 39 40 private boolean mVisible = true; 41 42 @Override 43 int getLayoutResId() { 44 return R.layout.slide; 45 } 46 47 @Override 48 protected void onCreate(Bundle savedInstanceState) { 49 super.onCreate(savedInstanceState); 50 51 mTransition = new AutoTransition(); 52 final SidePropagation propagation = new SidePropagation(); 53 propagation.setSide(Gravity.END); 54 propagation.setPropagationSpeed(0.4f); 55 mTransition.setPropagation(propagation); 56 57 mRoot = findViewById(R.id.root); 58 findViewById(R.id.toggle).setOnClickListener(v -> { 59 mVisible = !mVisible; 60 TransitionManager.beginDelayedTransition(mRoot, mTransition); 61 for (int i = 0, count = mRoot.getChildCount(); i < count; i++) { 62 mRoot.getChildAt(i).setVisibility(mVisible ? View.VISIBLE : View.GONE); 63 } 64 }); 65 } 66 67 } 68
