玩转Android---事件监听篇---第2篇

事件监听篇---第二篇

 

下面是各种常用控件的事件监听的使用

①EditText（编辑框）的事件监听---OnKeyListener

②RadioGroup、RadioButton（单选按钮）的事件监听---OnCheckedChangeListener

③CheckBox（多选按钮）的事件监听---OnCheckedChangeListener

④Spinner（下拉列表）的事件监听---OnItemSelectedListener

⑤Menu（菜单）的事件处理---onMenuItemSelected

⑥Dialog（对话框）的事件监听---DialogInterface.OnClickListener()

 

第一个例子：EditText的事件监听

 

package org.hualang.eventtest2;

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class EventTest2 extends Activity {
    /** Called when the activity is first created. */
	private TextView mytext;
	private EditText edittext;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mytext = (TextView)findViewById(R.id.mytext);
        edittext = (EditText)findViewById(R.id.edittext);
        /**
         * 设置当EditText为空，则提示“请输入账号”
         * 在配置文件main.xml中可以用android:hint="请输入账号"来实现
         */
        edittext.setHint("请输入账号");
        //下面为EditText事件监听
        edittext.setOnKeyListener(new EditText.OnKeyListener()
        {

			@Override
			public boolean onKey(View arg0, int arg1, KeyEvent arg2) {
				//得到文字，显示在TextView中
				mytext.setText("内容："+edittext.getText().toString());
				return false;
			}
        	
        });
    }
}

 main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:id="@+id/mytext"
    />
<EditText
	android:id="@+id/edittext"
	android:layout_width="fill_parent"
	android:layout_height="wrap_content"
	android:textSize="10pt"
/>
</LinearLayout>

 

运行结果如下：

 

 

 

第二个例子：单选按钮的事件监听处理

package org.hualang.eventtest;

import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

public class EventTest3 extends Activity {
    /** Called when the activity is first created. */
	private RadioGroup group;
	private RadioButton radio1,radio2,radio3,radio4;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        group = (RadioGroup)findViewById(R.id.radiogroup1);
        radio1 = (RadioButton)findViewById(R.id.button1);
        radio2 = (RadioButton)findViewById(R.id.button2);
        radio3 = (RadioButton)findViewById(R.id.button3);
        radio4 = (RadioButton)findViewById(R.id.button4);
        
        group.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
			
			@Override
			public void onCheckedChanged(RadioGroup group, int checkedId) {
				// TODO Auto-generated method stub
				if (checkedId == radio2.getId())
				{
					showMessage("正确答案：" + radio2.getText()+",恭喜你，答对了");
				}
				else
				{
					showMessage("对不起，虽然很多，但不是公认的最多");
				}
			}
		});
    }
    public void showMessage(String str)
    {
    	Toast toast = Toast.makeText(this, str, Toast.LENGTH_SHORT);
    	toast.setGravity(Gravity.TOP, 0, 220);
    	toast.show();
    }
}

 main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
	<TextView
		android:id="@+id/mytextview"
		android:layout_width="fill_parent"
		android:layout_height="wrap_content"
		android:text="哪个城市的美女最多？"
	/>
	<RadioGroup
		android:id="@+id/radiogroup1"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:orientation="vertical"
	>
		<RadioButton
			android:id="@+id/button1"
			android:layout_width="wrap_content"
			android:layout_height="wrap_content"
			android:text="杭州"
		/>
		<RadioButton
			android:id="@+id/button2"
			android:layout_width="wrap_content"
			android:layout_height="wrap_content"
			android:text="重庆"
		/>
		<RadioButton
			android:id="@+id/button3"
			android:layout_width="wrap_content"
			android:layout_height="wrap_content"
			android:text="成都"
		/>
		<RadioButton
			android:id="@+id/button4"
			android:layout_width="wrap_content"
			android:layout_height="wrap_content"
			android:text="香港"
		/>
	</RadioGroup>
</LinearLayout>

 

运行结果如下：

 

第三个例子：复选框的事件处理

package org.hualang.eventtest4;

import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.Toast;

public class EventTest4 extends Activity {
    /** Called when the activity is first created. */
	private CheckBox ch1,ch2,ch3,ch4,ch5;
	private Button mybutton;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        mybutton = (Button)findViewById(R.id.mybutton);
        ch1 = (CheckBox)findViewById(R.id.check1);
        ch2 = (CheckBox)findViewById(R.id.check2);
        ch3 = (CheckBox)findViewById(R.id.check3);
        ch4 = (CheckBox)findViewById(R.id.check4);
        ch5 = (CheckBox)findViewById(R.id.check5);
        
        ch1.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener()
        {

			@Override
			public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
				// TODO Auto-generated method stub
				if(ch1.isChecked())
				{
					showMessage("你选择了"+ch1.getText());
				}
			}
        	
        });
        ch2.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener()
        {

			@Override
			public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
				// TODO Auto-generated method stub
				if(ch3.isChecked())
				{
					showMessage("你选择了"+ch2.getText());
				}
			}
        	
        });
        ch3.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener()
        {

			@Override
			public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
				// TODO Auto-generated method stub
				if(ch3.isChecked())
				{
					showMessage("你选择了"+ch3.getText());
				}
			}
        	
        });
        ch4.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener()
        {

			@Override
			public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
				// TODO Auto-generated method stub
				if(ch4.isChecked())
				{
					showMessage("你选择了"+ch4.getText());
				}
			}
        	
        });
        ch5.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener()
        {

			@Override
			public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
				// TODO Auto-generated method stub
				if(ch5.isChecked())
				{
					showMessage("你选择了"+ch5.getText());
				}
			}
        	
        });
        
        mybutton.setOnClickListener(new Button.OnClickListener()
        {

			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				int num = 0;
				if(ch1.isChecked())
				{
					num++;
				}
				if(ch2.isChecked())
				{
					num++;
				}
				if(ch3.isChecked())
				{
					num++;
				}
				if(ch4.isChecked())
				{
					num++;
				}
				if(ch5.isChecked())
				{
					num++;
				}
				
				showMessage("谢谢参与，您一共选择了"+num+"项");
				
			}
        	
        });
    }
    

    
    public void showMessage(String str)
    {
    	Toast toast = Toast.makeText(this, str, Toast.LENGTH_SHORT);
    	toast.setGravity(Gravity.TOP, 0, 220);
    	toast.show();
    }
}

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
	<TextView  
	    android:layout_width="fill_parent" 
	    android:layout_height="wrap_content" 
	    android:text="你喜欢哪些智能手机系统"
	    />
	<CheckBox
		android:id="@+id/check1"
		android:layout_width="fill_parent"
		android:layout_height="wrap_content"
		android:text="苹果 ios"
	/>
	<CheckBox
		android:id="@+id/check2"
		android:layout_width="fill_parent"
		android:layout_height="wrap_content"
		android:text="谷歌 Android"
	/>
	<CheckBox
		android:id="@+id/check3"
		android:layout_width="fill_parent"
		android:layout_height="wrap_content"
		android:text="RIM BlackBerry"
	/>
	<CheckBox
		android:id="@+id/check4"
		android:layout_width="fill_parent"
		android:layout_height="wrap_content"
		android:text="微软 Windows phone 7"
	/>
	<CheckBox
		android:id="@+id/check5"
		android:layout_width="fill_parent"
		android:layout_height="wrap_content"
		android:text="诺基亚 symbian"
	/>
	<Button
		android:id="@+id/mybutton"
		android:layout_width="fill_parent"
		android:layout_height="wrap_content"
		android:text="确定"
	/>

</LinearLayout>

 

运行结果：

 

第四个例子：Spinner下拉菜单的事件处理

package org.hualang.eventtest5;

import android.app.Activity;   
import android.os.Bundle;   
import android.view.View;   
import android.widget.AdapterView;   
import android.widget.ArrayAdapter;   
import android.widget.Spinner;   
import android.widget.TextView;   
  
public class EventTest5 extends Activity {   
    /** Called when the activity is first created. */  
    private static final String[] citys={"杭州","北京","成都","大连","深圳","南京"};   
    private TextView text;   
    private Spinner spinner;   
    private ArrayAdapter<String> adapter;   
    @Override  
    public void onCreate(Bundle savedInstanceState) {   
        super.onCreate(savedInstanceState);   
        setContentView(R.layout.main);   
        text=(TextView)findViewById(R.id.text);   
        spinner=(Spinner)findViewById(R.id.spinner);   
           
        //将可选内容与ArrayAdapter连接   
        adapter=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,citys);   
        //设置下拉列表风格   
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);   
        //将adapter添加到spinner中   
        spinner.setAdapter(adapter);   
        //添加Spinner事件监听   
        spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener()   
        {   
  
            @Override  
            public void onItemSelected(AdapterView<?> arg0, View arg1,   
                    int arg2, long arg3) {   
                // TODO Auto-generated method stub   
                text.setText("你所在的城市是："+citys[arg2]);   
                //设置显示当前选择的项   
                arg0.setVisibility(View.VISIBLE);   
            }   
  
            @Override  
            public void onNothingSelected(AdapterView<?> arg0) {   
                // TODO Auto-generated method stub   
                   
            }   
               
        });   
    }   
}  

 

main.xml

<?xml version="1.0" encoding="utf-8"?>   
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:orientation="vertical"  
    android:layout_width="fill_parent"  
    android:layout_height="fill_parent"  
    >   
<TextView     
    android:id="@+id/text"  
    android:layout_width="fill_parent"    
    android:layout_height="wrap_content"    
    android:text="您所在的城市"  
    />   
<Spinner   
    android:id="@+id/spinner"  
    android:layout_width="wrap_content"  
    android:layout_height="wrap_content"  
    android:layout_centerHorizontal="true"  
/>   
</LinearLayout>

 

运行结果如下：

 

 

 

第五个例子：Menu（菜单）的事件处理

package org.hualang.eventtest6;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.Toast;

public class EventTest6 extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// TODO Auto-generated method stub
		MenuInflater inflater = getMenuInflater();
		//设置menu界面为res/menu/menu.xml
		inflater.inflate(R.menu.menu, menu);
		return true;
	}

	@Override
	public boolean onMenuItemSelected(int featureId, MenuItem item) {
		//得到当前选中的MenuItem的ID
		int itemId = item.getItemId();
		switch(itemId)
		{
		case R.id.apple:
			Toast toast = Toast.makeText(this, "这是苹果", Toast.LENGTH_SHORT);
			toast.show();
			break;
		case R.id.banana:
			Toast toast2 = Toast.makeText(this, "这是香蕉", Toast.LENGTH_SHORT);
			toast2.show();
			break;
		case R.id.exit:
			EventTest6.this.finish();
			break;
		}
		return true;
	}
    
    
}

 res/menu/menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
	<item android:id="@+id/apple"
		android:title="苹果"
	/>
	<item android:id="@+id/banana"
		android:title="香蕉"
		/>
	<item android:id="@+id/exit"
		android:title="退出"
		/>
</menu>

 

运行结果如下：

 

 

 

第六个例子：对话框的事件处理

package org.hualang.dialog;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
	ProgressDialog myDialog;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        Dialog dialog = new AlertDialog.Builder(MainActivity.this)
        .setTitle("登录提示")
        .setMessage("这里需要登录")
        .setPositiveButton("确定", new DialogInterface.OnClickListener() {
			
			@Override
			public void onClick(DialogInterface dialog, int which) {
				// TODO Auto-generated method stub
				LayoutInflater factory = LayoutInflater.from(MainActivity.this);
				final View DialogView = factory.inflate(R.layout.dialog, null);
				AlertDialog dlg = new AlertDialog.Builder(MainActivity.this)
				.setTitle("登录框")
				.setView(DialogView)
				.setPositiveButton("确定", new DialogInterface.OnClickListener() {
					
					@Override
					public void onClick(DialogInterface dialog, int whichButton) {
						// TODO Auto-generated method stub
						myDialog = ProgressDialog.show(MainActivity.this, "请等待...", "正在为你登录", true);
						new Thread()
						{
							public void run()
							{
								try
								{
									sleep(3000);
								}catch(Exception e)
								{
									e.printStackTrace();
								}finally
								{
									myDialog.dismiss();
								}
							}
						}.start();
					}
				}).setNegativeButton("取消",
						new DialogInterface.OnClickListener() {
							
							@Override
							public void onClick(DialogInterface dialog, int which) {
								// TODO Auto-generated method stub
								MainActivity.this.finish();
							}
						}).create();
				dlg.show();
			}
		}).setNeutralButton("退出", new DialogInterface.OnClickListener() {
			
			@Override
			public void onClick(DialogInterface dialog, int which) {
				// TODO Auto-generated method stub
				MainActivity.this.finish();
			}
		}).create();
        dialog.show();
    
    }
}

 

res/layout/dialog.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
	<TextView  
		android:id="@+id/username"
	    android:layout_width="wrap_content" 
	    android:layout_height="wrap_content"
	    android:layout_marginLeft="20dip"
	    android:layout_marginRight="20dip" 
	    android:text="账号"
	    android:gravity="left"
	    android:textAppearance="?android:attr/textAppearanceMedium"
    />
  	<EditText
  		android:id="@+id/myusername"
  		android:layout_height="wrap_content"
  		android:layout_width="fill_parent"
  		android:layout_marginLeft="20dip"
  		android:layout_marginRight="20dip"
  		android:scrollHorizontally="true"
  		android:autoText="false"
  		android:capitalize="none"
  		android:gravity="fill_horizontal"
  		android:textAppearance="?android:attr/textAppearanceMedium"
  	/>
  	<TextView
  		android:id="@+id/password"
  		android:layout_width="fill_parent"
  		android:layout_height="wrap_content"
  		android:layout_marginLeft="20dip"
  		android:layout_marginRight="20dip"
  		android:text="密码"
  		android:gravity="left"
  		android:textAppearance="?android:attr/textAppearanceMedium"
  	/>
  	<EditText
  		android:id="@+id/mypassword"
  		android:layout_width="fill_parent"
  		android:layout_height="wrap_content"
  		android:layout_marginLeft="20dip"
  		android:layout_marginRight="20dip"
  		android:scrollHorizontally="true"
  		android:autoText="false"
  		android:capitalize="none"
  		android:gravity="fill_horizontal"
  		android:password="true"
  	/>
</LinearLayout>

 

 

运行结果：

 

 

 

 

评论

7 楼 jiazi020390 2011-09-08  

很好!!~~

6 楼 sxd_0524 2011-08-18  

我喜欢。。

5 楼 xianyunxiaoyao 2011-07-05  

不管是哪里的，学到了才是真理！  

4 楼 wangguangji 2011-06-01  

怎么发现你的这些东西都是一个视频里面的例子啊呢

3 楼 一点寒意 2011-06-01  

都是一些界面上的东西，不过楼主精神可嘉。

2 楼 kkvsyy 2011-06-01  

这个东西　好　

1 楼 yabar 2011-05-31