Android各种控件的事件监听 (转)

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();    }}

<?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>

 

 

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：

 

 

   文章来源：http://www.iteye.com/topic/1060815