Java tutorial
/* * 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.me.harris.listviewitemanimations._01_activityAnim; import android.content.Intent; import android.content.res.Resources; import android.graphics.ColorMatrix; import android.graphics.ColorMatrixColorFilter; import android.graphics.drawable.BitmapDrawable; import android.os.Build; import android.os.Bundle; import android.support.v4.content.ContextCompat; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.widget.GridLayout; import android.widget.ImageView; import com.me.harris.listviewitemanimations.R; import java.util.ArrayList; import java.util.HashMap; import static com.me.harris.listviewitemanimations.utils.Utils.getStatusBarHeight; /** * This example shows how to create a custom activity animation when you want something more * than window animations can provide. The idea is to disable window animations for the * activities and to instead launch or return from the sub-activity immediately, but use * property animations inside the activities to customize the transition. * <p> * Watch the associated video for this demo on the DevBytes channel of developer.android.com * or on the DevBytes playlist in the androiddevelopers channel on YouTube at * https://www.youtube.com/playlist?list=PLWz5rJ2EKKc_XOgcRukSoKKjewFJZrKV0. */ public class ActivityAnimations extends AppCompatActivity { private static final String PACKAGE = "com.example.android.activityanim"; static float sAnimatorScale = 1; GridLayout mGridLayout; HashMap<ImageView, PictureData> mPicturesData = new HashMap<ImageView, PictureData>(); BitmapUtils mBitmapUtils = new BitmapUtils(); /** * When the user clicks a thumbnail, bundle up information about it and launch the * details activity. */ private View.OnClickListener thumbnailClickListener = new View.OnClickListener() { @Override public void onClick(View v) { // Interesting data to pass across are the thumbnail size/location, the // resourceId of the source bitmap, the picture description, and the // orientation (to avoid returning back to an obsolete configuration if // the device rotates again in the meantime) int[] screenLocation = new int[2]; v.getLocationOnScreen(screenLocation); PictureData info = mPicturesData.get(v); Intent subActivity = new Intent(ActivityAnimations.this, PictureDetailsActivity.class); int orientation = getResources().getConfiguration().orientation; subActivity.putExtra(PACKAGE + ".orientation", orientation) .putExtra(PACKAGE + ".resourceId", info.resourceId) .putExtra(PACKAGE + ".left", screenLocation[0]).putExtra(PACKAGE + ".top", screenLocation[1]) .putExtra(PACKAGE + ".width", v.getWidth()).putExtra(PACKAGE + ".height", v.getHeight()) .putExtra(PACKAGE + ".description", info.description); startActivity(subActivity); // Override transitions: we don't want the normal window animation in addition // to our custom one overridePendingTransition(0, 0); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_animations); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); getSupportActionBar().setTitle(""); handleStatusBar(); // Grayscale filter used on all thumbnails ColorMatrix grayMatrix = new ColorMatrix(); grayMatrix.setSaturation(0); ColorMatrixColorFilter grayscaleFilter = new ColorMatrixColorFilter(grayMatrix); mGridLayout = (GridLayout) findViewById(R.id.gridLayout); mGridLayout.setColumnCount(3); mGridLayout.setUseDefaultMargins(true); // add all photo thumbnails to layout Resources resources = getResources(); ArrayList<PictureData> pictures = mBitmapUtils.loadPhotos(resources); for (int i = 0; i < pictures.size(); ++i) { PictureData pictureData = pictures.get(i); BitmapDrawable thumbnailDrawable = new BitmapDrawable(resources, pictureData.thumbnail); thumbnailDrawable.setColorFilter(grayscaleFilter); ImageView imageView = new ImageView(this); imageView.setOnClickListener(thumbnailClickListener); imageView.setImageDrawable(thumbnailDrawable); mPicturesData.put(imageView, pictureData); mGridLayout.addView(imageView); } } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.activity_better_window_animations, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == R.id.menu_slow) { sAnimatorScale = item.isChecked() ? 1 : 5; item.setChecked(!item.isChecked()); } return super.onOptionsItemSelected(item); } private void handleStatusBar() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) { ViewGroup mContentView = (ViewGroup) findViewById(Window.ID_ANDROID_CONTENT); /* int statusBarHeight = getStatusBarHeight(); View mChildView = mContentView.getChildAt(0); if (mChildView != null) { FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) mChildView.getLayoutParams(); //? ChildView marginTop, ? if (lp != null && lp.topMargin < statusBarHeight && lp.height != statusBarHeight) { //? ViewCompat.setFitsSystemWindows(mChildView, false); lp.topMargin += statusBarHeight; mChildView.setLayoutParams(lp); } } View statusBarView = mContentView.getChildAt(0); if (statusBarView != null && statusBarView.getLayoutParams() != null && statusBarView.getLayoutParams().height == statusBarHeight) { //???? View statusBarView.setBackgroundColor(ContextCompat.getColor(this,R.color.colorPrimaryDark)); return; }*/ int statusBarHeight = getStatusBarHeight(); View statusBarView = new View(this); ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, statusBarHeight); statusBarView.setBackgroundColor(ContextCompat.getColor(this, R.color.colorPrimaryDark)); //? ContentView ? View mContentView.addView(statusBarView, 0, lp); } } }