Android练习之ListView 及代码中新建LinearLayout、TextView、ListView

View Code
  1 package com.example.flexd10;
  2 
  3 import android.os.Bundle;
  4 import android.app.Activity;
  5 import android.util.Log;
  6 import android.view.Gravity;
  7 import android.view.Menu;
  8 import android.view.View;
  9 import android.widget.AdapterView;
 10 import android.widget.AdapterView.OnItemClickListener;
 11 import android.widget.AdapterView.OnItemSelectedListener;
 12 import android.widget.ArrayAdapter;
 13 import android.widget.LinearLayout;
 14 import android.widget.LinearLayout.LayoutParams;
 15 import android.widget.ListView;
 16 import android.widget.TextView;
 17 import android.widget.Toast;
 18 
 19 /**
 20  * 1.代码中新建LinearLayout、TextView、ListView
 21  * 2.ListView事件监听
 22  */
 23 public class MainActivity extends Activity {
 24     
 25     private String[] strArray = new String[]{"A","B","C","D","E","F","G","H","I"};
 26     ListView listView1;
 27     LinearLayout linearLayout1;
 28     TextView tv1;
 29     
 30 
 31     @Override
 32     protected void onCreate(Bundle savedInstanceState) {
 33         super.onCreate(savedInstanceState);
 34         //setContentView(R.layout.activity_main);
 35         
 36         //linearLayout
 37         linearLayout1 = new LinearLayout(this);
 38         linearLayout1.setOrientation(LinearLayout.VERTICAL);
 39         linearLayout1.setBackgroundColor(android.graphics.Color.GREEN);
 40         
 41         //对齐方式
 42         LinearLayout.LayoutParams params = new LayoutParams(
 43                 LinearLayout.LayoutParams.MATCH_PARENT,
 44                 LinearLayout.LayoutParams.WRAP_CONTENT);
 45         
 46         //TextView
 47         tv1 = new TextView(this);
 48         tv1.setText("Hey");
 49         tv1.setTextColor(android.graphics.Color.YELLOW);
 50         //tv1.setGravity(Gravity.CENTER_HORIZONTAL);
 51         tv1.setGravity(Gravity.BOTTOM);
 52         //add
 53         linearLayout1.addView(tv1,params);
 54 
 55         //listView
 56         listView1 = new ListView(this);
 57         listView1.setBackgroundColor(android.graphics.Color.LTGRAY);
 58         //add
 59         linearLayout1.addView(listView1,params);
 60         
 61         //ContentView
 62         setContentView(linearLayout1);
 63         
 64         //Adapter
 65         ArrayAdapter arrayAdapter = new ArrayAdapter<String>(this,
 66                 android.R.layout.simple_list_item_checked, strArray);// R.layout.list_item
 67         //set
 68         listView1.setAdapter(arrayAdapter);
 69         listView1.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
 70         
 71         /**
 72          * ItemClick
 73          */
 74         listView1.setOnItemClickListener(new OnItemClickListener() {
 75 
 76             @Override
 77             public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
 78                     long arg3) {
 79                 // TODO Auto-generated method stub
 80                 Log.i("ItemClick",strArray[arg2]);
 81                 tv1.setText(strArray[arg2]);
 82                 Toast.makeText(MainActivity.this, strArray[arg2], Toast.LENGTH_LONG).show();
 83             }
 84         });
 85         
 86         /**
 87          * ItemSelected 据说在触屏手机上没有效果的？
 88          */
 89         listView1.setOnItemSelectedListener(new OnItemSelectedListener() {
 90 
 91             @Override
 92             public void onItemSelected(AdapterView<?> arg0, View arg1,
 93                     int arg2, long arg3) {
 94                 // TODO Auto-generated method stub
 95                 Log.i("ItemSelected",strArray[arg2]);
 96                 Log.i("ItemSelected",arg0.getSelectedItem().toString());
 97                 tv1.setText(strArray[arg2]);
 98                 tv1.setText(arg0.getSelectedItem().toString());
 99             }
100 
101             @Override
102             public void onNothingSelected(AdapterView<?> arg0) {
103                 // TODO Auto-generated method stub
104                 tv1.setText("None");
105             }
106         });
107         
108     }
109 
110     @Override
111     public boolean onCreateOptionsMenu(Menu menu) {
112         // Inflate the menu; this adds items to the action bar if it is present.
113         getMenuInflater().inflate(R.menu.activity_main, menu);
114         return true;
115     }
116 
117 }
posted on 2012-12-27 16:36 hanxun 阅读(348) 评论(0) 收藏举报