| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.example.android.keyframeanimation; |
| |
| import android.app.Activity; |
| import android.graphics.Bitmap; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.Paint; |
| import android.graphics.drawable.AnimationDrawable; |
| import android.graphics.drawable.BitmapDrawable; |
| import android.os.Bundle; |
| import android.view.View; |
| import android.widget.ImageView; |
| |
| /** |
| * This example shows how to use AnimationDrawable to construct a keyframe animation where each |
| * frame is shown for a specified duration. |
| * |
| * Watch the associated video for this demo on the DevBytes channel of developer.android.com |
| * or on YouTube at https://www.youtube.com/watch?v=V3ksidLf7vA. |
| */ |
| public class KeyframeAnimation extends Activity { |
| |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setContentView(R.layout.activity_keyframe_animation); |
| |
| ImageView imageview = (ImageView) findViewById(R.id.imageview); |
| |
| // Create the AnimationDrawable in which we will store all frames of the animation |
| final AnimationDrawable animationDrawable = new AnimationDrawable(); |
| for (int i = 0; i < 10; ++i) { |
| animationDrawable.addFrame(getDrawableForFrameNumber(i), 300); |
| } |
| // Run until we say stop |
| animationDrawable.setOneShot(false); |
| |
| imageview.setImageDrawable(animationDrawable); |
| |
| // When the user clicks on the image, toggle the animation on/off |
| imageview.setOnClickListener(new View.OnClickListener() { |
| |
| @Override |
| public void onClick(View v) { |
| if (animationDrawable.isRunning()) { |
| animationDrawable.stop(); |
| } else { |
| animationDrawable.start(); |
| } |
| } |
| }); |
| } |
| |
| /** |
| * The 'frames' in this app are nothing more than a gray background with text indicating |
| * the number of the frame. |
| */ |
| private BitmapDrawable getDrawableForFrameNumber(int frameNumber) { |
| Bitmap bitmap = Bitmap.createBitmap(400, 400, Bitmap.Config.ARGB_8888); |
| Canvas canvas = new Canvas(bitmap); |
| canvas.drawColor(Color.GRAY); |
| Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); |
| paint.setTextSize(80); |
| paint.setColor(Color.BLACK); |
| canvas.drawText("Frame " + frameNumber, 40, 220, paint); |
| return new BitmapDrawable(getResources(), bitmap); |
| } |
| |
| } |