Android 多個ImageView圖片層疊透明區域點擊事件穿透

經常用到多個透明圖片層疊，但又需要獲取不同圖片的點擊事件，本文實現圖片透明區域穿透點擊事件。

效果圖：

一、先上圖片，這2張圖片尺寸是一樣的，放到drawable目錄下：

圖1：transparent.png

圖2：transparent2.png

二、上布局文件，test.xml：

1. <?xml version="1.0" encoding="utf-8"?>
2. <FrameLayout xmlns:Android="http://schemas.android.com/apk/res/android"
3. android:layout_width="fill_parent"
4. android:layout_height="fill_parent"
5. android:orientation="vertical"
6. android:gravity="center"
7. android:id="@+id/mainLayout">
9. <ImageView android:id="@+id/ImageView01"
10. android:layout_width="wrap_content"
11. android:layout_height="wrap_content"
12. android:src="@drawable/transparent"/>
14. <ImageView android:id="@+id/ImageView02"
15. android:layout_width="wrap_content"
16. android:layout_height="wrap_content"
17. android:src="@drawable/transparent2"/>
19. </FrameLayout>

三、上Activity文件，MainActivity.java

1. package org.shuxiang.test;
3. import android.app.Activity;
4. import android.graphics.Bitmap;
5. import android.graphics.drawable.BitmapDrawable;
6. import android.os.Bundle;
7. import android.util.Log;
8. import android.view.MotionEvent;
9. import android.view.View;
10. import android.view.Window;
11. import android.view.View.OnClickListener;
12. import android.view.View.OnTouchListener;
13. import android.widget.ImageView;
15. public class MainActivity extends Activity
16. {
17. private ImageView iv1;
18. private ImageView iv2;
19. private Bitmap bitmap1, bitmap2;
20. private boolean iv1Transparent = false;
21. private boolean iv2Transparent = false;
23. @Override
24. public void onCreate(Bundle savedInstanceState) {
25. super.onCreate(savedInstanceState);
26. requestWindowFeature(Window.FEATURE_NO_TITLE);
27. setContentView(R.layout.test);
29. iv1 = (ImageView) findViewById(R.id.ImageView01);
30. iv2 = (ImageView) findViewById(R.id.ImageView02);
31. bitmap1 = ((BitmapDrawable) (iv1.getDrawable())).getBitmap();
32. bitmap2 = ((BitmapDrawable) (iv2.getDrawable())).getBitmap();
34. iv1.setOnClickListener(new OnClickListener(){
35. @Override
36. public void onClick(View v) {
37. // TODO Auto-generated method stub
38. if(iv1Transparent)
39. {
40. Log.i("test", "圖1透明區域");
41. }
42. else
43. {
44. Log.i("test", "圖1點擊");
45. }
46. }
48. });
50. iv1.setOnTouchListener(new OnTouchListener()
51. {
52. @Override
53. public boolean onTouch(View arg0, MotionEvent arg1)
54. {
55. // TODO Auto-generated method stub
56. if(bitmap1.getPixel((int)(arg1.getX()),((int)arg1.getY()))==0)
57. {
58. Log.i("test", "圖1透明區域");
59. iv1Transparent = true; //透明區域設置true
60. }
61. else
62. {
63. Log.i("test", "圖1實體區域");
64. iv1Transparent = false;
65. }
66. return false;
67. }
68. });
70. iv2.setOnClickListener(new OnClickListener()
71. {
72. @Override
73. public void onClick(View v) {
74. // TODO Auto-generated method stub
75. if(iv2Transparent)
76. {
77. Log.i("test", "圖2透明區域");
78. }
79. else
80. {
81. Log.i("test", "圖2點擊");
82. }
83. }
85. });
87. iv2.setOnTouchListener(new OnTouchListener()
88. {
89. @Override
90. public boolean onTouch(View v, MotionEvent event) {
91. // TODO Auto-generated method stub
92. if(bitmap2.getPixel((int)(event.getX()),((int)event.getY()))==0)
93. {
94. Log.i("test", "圖2透明區域");
95. iv2Transparent = true; //透明區域設置true
96. iv1.dispatchTouchEvent(event);
97. }
98. else
99. {
100. Log.i("test", "圖2實體區域");
101. iv2Transparent = false;
102. }
103. return false;
104. }
105. });
106. }
107. }