1 package com.example.flexd9;
2
3 import android.os.Bundle;
4 import android.app.Activity;
5 import android.view.Menu;
6 import android.view.View;
7 import android.view.View.OnClickListener;
8 import android.widget.AdapterView;
9 import android.widget.AdapterView.OnItemClickListener;
10 import android.widget.ArrayAdapter;
11 import android.widget.Button;
12 import android.widget.GridView;
13 import android.widget.TextView;
14
15 /**
16 * 点击Button在GridView显示相应阵列，点击阵列内容在TextView显示相应选中值
17 */
18 public class MainActivity extends Activity {
19
20 private TextView tv1;
21 private GridView gv1;
22 private Button bt1,bt2;
23 private String[] strArray1,strArray2;
24 private ArrayAdapter<String> arrayAdapter1;
25
26 @Override
27 protected void onCreate(Bundle savedInstanceState) {
28 super.onCreate(savedInstanceState);
29 setContentView(R.layout.activity_main);
30
31 //4个字符串阵列 目标是2X2
32 strArray1 = new String[]{
33 getResources().getString(R.string.str_list1),
34 getResources().getString(R.string.str_list2),
35 getResources().getString(R.string.str_list3),
36 getResources().getString(R.string.str_list4)
37 };
38
39 //9个字符串阵列 目标是3X3
40 strArray2 = new String[]{
41 getResources().getString(R.string.str_list1),
42 getResources().getString(R.string.str_list2),
43 getResources().getString(R.string.str_list3),
44 getResources().getString(R.string.str_list4),
45 getResources().getString(R.string.str_list5),
46 getResources().getString(R.string.str_list6),
47 getResources().getString(R.string.str_list7),
48 getResources().getString(R.string.str_list8),
49 getResources().getString(R.string.str_list9),
50 };
51
52 // Widget
53 tv1 = (TextView) findViewById(R.id.tv1);
54 gv1 = (GridView) findViewById(R.id.gv1);
55 bt1 = (Button) findViewById(R.id.bt1);
56 bt2 = (Button) findViewById(R.id.bt2);
57
58 /**
59 * listener 点击Button给GridView赋不同阵列值
60 */
61 OnClickListener listener = new OnClickListener() {
62 @Override
63 public void onClick(View v) {
64 //2X2
65 if(v.getId()==R.id.bt1){
66 arrayAdapter1 = new ArrayAdapter<String>(MainActivity.this,R.layout.list_item,strArray1);
67 gv1.setNumColumns(2);
68 gv1.setAdapter(arrayAdapter1);
69 gv1.setSelection(2);
70 gv1.refreshDrawableState();
71 //3X3
72 }else if(v.getId()==R.id.bt2){
73 arrayAdapter1 = new ArrayAdapter<String>(MainActivity.this,R.layout.list_item,strArray2);
74 gv1.setNumColumns(3);
75 gv1.setAdapter(arrayAdapter1);
76 }
77 }
78 };
79
80 bt1.setOnClickListener(listener);
81 bt2.setOnClickListener(listener);
82
83 /**
84 * 点击GridView给TextView赋值相应内容
85 */
86 OnItemClickListener itemListener = new OnItemClickListener(){
87
88 @Override
89 public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
90 long arg3) {
91 switch(arrayAdapter1.getCount()){
92 //arg2是position
93 case 4:
94 tv1.setText(strArray1[arg2]);
95 break;
96 case 9:
97 tv1.setText(strArray2[arg2]);
98 break;
99 }
100 }
101 };
102
103 gv1.setOnItemClickListener(itemListener);
104 }
105
106 @Override
107 public boolean onCreateOptionsMenu(Menu menu) {
108 // Inflate the menu; this adds items to the action bar if it is present.
109 getMenuInflater().inflate(R.menu.activity_main, menu);
110 return true;
111 }
112
113 }
View Code
