1 /*
2  * Copyright (C) 2012 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.android.test.hwui;
18 
19 import android.animation.ObjectAnimator;
20 import android.animation.ValueAnimator;
21 import android.app.Activity;
22 import android.content.Context;
23 import android.graphics.Canvas;
24 import android.graphics.Color;
25 import android.graphics.Paint;
26 import android.os.Bundle;
27 import android.text.Spannable;
28 import android.text.SpannableStringBuilder;
29 import android.text.style.BackgroundColorSpan;
30 import android.text.style.ForegroundColorSpan;
31 import android.text.style.ImageSpan;
32 import android.text.style.SuggestionSpan;
33 import android.text.style.UnderlineSpan;
34 import android.view.View;
35 import android.widget.Button;
36 import android.widget.EditText;
37 import android.widget.LinearLayout;
38 import android.widget.TextView;
39 
40 public class ViewPropertyAlphaActivity extends Activity {
41 
42     MyView myViewAlphaDefault, myViewAlphaHandled;
43 
44     @Override
onCreate(Bundle savedInstanceState)45     protected void onCreate(Bundle savedInstanceState) {
46         super.onCreate(savedInstanceState);
47 
48         setContentView(R.layout.view_properties);
49 
50         getWindow().getDecorView().postDelayed(new Runnable() {
51             @Override
52             public void run() {
53                 startAnim(R.id.button);
54                 startAnim(R.id.textview);
55                 startAnim(R.id.spantext);
56                 startAnim(R.id.edittext);
57                 startAnim(R.id.selectedtext);
58                 startAnim(R.id.textviewbackground);
59                 startAnim(R.id.layout);
60                 startAnim(R.id.imageview);
61                 startAnim(myViewAlphaDefault);
62                 startAnim(myViewAlphaHandled);
63                 EditText selectedText = (EditText) findViewById(R.id.selectedtext);
64                 selectedText.setSelection(3, 8);
65             }
66         }, 2000);
67 
68         Button invalidator = (Button) findViewById(R.id.invalidateButton);
69         invalidator.setOnClickListener(new View.OnClickListener() {
70             @Override
71             public void onClick(View v) {
72                 findViewById(R.id.textview).invalidate();
73                 findViewById(R.id.spantext).invalidate();
74             }
75         });
76 
77         TextView textView = (TextView) findViewById(R.id.spantext);
78         if (textView != null) {
79             SpannableStringBuilder text =
80                     new SpannableStringBuilder("Now this is a short text message with spans");
81 
82             text.setSpan(new BackgroundColorSpan(Color.RED), 0, 3,
83                     Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
84             text.setSpan(new ForegroundColorSpan(Color.BLUE), 4, 9,
85                     Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
86             text.setSpan(new SuggestionSpan(this, new String[]{"longer"}, 3), 11, 16,
87                     Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
88             text.setSpan(new UnderlineSpan(), 17, 20,
89                     Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
90             text.setSpan(new ImageSpan(this, R.drawable.icon), 21, 22,
91                     Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
92 
93             textView.setText(text);
94         }
95 
96         LinearLayout container = (LinearLayout) findViewById(R.id.container);
97         myViewAlphaDefault = new MyView(this, false);
98         myViewAlphaDefault.setLayoutParams(new LinearLayout.LayoutParams(75, 75));
99         container.addView(myViewAlphaDefault);
100         myViewAlphaHandled = new MyView(this, true);
101         myViewAlphaHandled.setLayoutParams(new LinearLayout.LayoutParams(75, 75));
102         container.addView(myViewAlphaHandled);
103     }
104 
startAnim(View target)105     private void startAnim(View target) {
106         ObjectAnimator anim = ObjectAnimator.ofFloat(target, View.ALPHA, 0);
107         anim.setRepeatCount(ValueAnimator.INFINITE);
108         anim.setRepeatMode(ValueAnimator.REVERSE);
109         anim.setDuration(1000);
110         anim.start();
111     }
startAnim(int id)112     private void startAnim(int id) {
113         startAnim(findViewById(id));
114     }
115 
116     private static class MyView extends View {
117         private int mMyAlpha = 255;
118         private boolean mHandleAlpha;
119         private Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
120 
MyView(Context context, boolean handleAlpha)121         private MyView(Context context, boolean handleAlpha) {
122             super(context);
123             mHandleAlpha = handleAlpha;
124             mPaint.setColor(Color.RED);
125         }
126 
127         @Override
onDraw(Canvas canvas)128         protected void onDraw(Canvas canvas) {
129             if (mHandleAlpha) {
130                 mPaint.setAlpha(mMyAlpha);
131             }
132             canvas.drawCircle(30, 30, 30, mPaint);
133         }
134 
135         @Override
onSetAlpha(int alpha)136         protected boolean onSetAlpha(int alpha) {
137             if (mHandleAlpha) {
138                 mMyAlpha = alpha;
139                 return true;
140             }
141             return super.onSetAlpha(alpha);
142         }
143     }
144 
145 }
146