android开发

开发平台：
Java

EX04_19.java：源码内容
							package irdc.ex04_19;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
public class EX04_19 extends Activity
{
  private static final String[] array =
  {
    "sunday", "monday", "tuesday",
    "wednesday", "thursday", "friday",
    "saturday"
  };
  
  LinearLayout myLinearLayout;
  TextView myTextView;
  ListView myListView;
  
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    /* 添加LinearLayout */
    myLinearLayout = new LinearLayout(this);
    myLinearLayout.setOrientation(LinearLayout.VERTICAL);
    myLinearLayout.setBackgroundColor(android.graphics.Color.WHITE);
    /* 添加TextView */
    myTextView = new TextView(this);
    LinearLayout.LayoutParams param1 = new LinearLayout.LayoutParams
    (
      LinearLayout.LayoutParams.FILL_PARENT,
      LinearLayout.LayoutParams.WRAP_CONTENT
    );
    
    myTextView.setText(R.string.title);
    
    myTextView.setTextColor(getResources().getColor(R.drawable.blue));
    
    /* 将TextView加到myLinearLayout */
    myLinearLayout.addView(myTextView, param1);
    
    /* 添加ListView */
    myListView = new ListView(this);
    LinearLayout.LayoutParams param2 = new LinearLayout.LayoutParams
    (
      LinearLayout.LayoutParams.FILL_PARENT,
      LinearLayout.LayoutParams.WRAP_CONTENT
    );
    
    myListView.setBackgroundColor
    (getResources().getColor(R.drawable.ltgray));
    
    /* 将ListView加到myLinearLayout */
    myLinearLayout.addView(myListView, param2);
    
    /* 将LinearLayout加到ContentView */
    setContentView(myLinearLayout);
    
    /* new ArrayAdapter对象并将array字符串数组传入 */
    ArrayAdapter<String> adapter = 
    new ArrayAdapter<String>
    (this, R.layout.my_simple_list_item, array);
    
    /* 将ArrayAdapter添加ListView对象中 */
    myListView.setAdapter(adapter);
    /* myListView添加OnItemSelectedListener */
    myListView.setOnItemSelectedListener
    (new AdapterView.OnItemSelectedListener()
    {
      @Override
      public void onItemSelected
      (AdapterView<?> arg0, View arg1, int arg2, long arg3)
      {
        /* 使用getSelectedItem()将选择的值带入myTextView中 */
        myTextView.setText
        ("你选的是" + arg0.getSelectedItem().toString());
      }
      
      @Override
      public void onNothingSelected(AdapterView<?> arg0)
      {
        // TODO Auto-generated method stub
      }
    });
    
    /* myListView添加OnItemClickListener */
    myListView.setOnItemClickListener
    (new AdapterView.OnItemClickListener()
    {
      @Override
      public void onItemClick
      (AdapterView<?> arg0, View arg1, int arg2, long arg3)
      {
        /* 使用String[index]，arg2为点击到ListView的index，
        并将值带入myTextView中 */
        myTextView.setText("你选的是" + array[arg2]);
      }
    });
  }
}

						