android 入门demo 事件监听

package com.isoftstone.cry;import android.app.Activity;import android.os.Bundle;import android.view.KeyEvent;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnFocusChangeListener;import android.view.View.OnKeyListener;import android.widget.Button;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.CompoundButton.OnCheckedChangeListener;import android.widget.EditText;import android.widget.Toast;public class EventListenerActivity extends Activity{private EditText myEdit1,myEdit2 ;private CheckBox cb1 ;private Button btn1,btn2 ;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.event_listener_layout);//获取组件对象myEdit1 = (EditText)this.findViewById(R.id.editText1);myEdit2 = (EditText)this.findViewById(R.id.editText2);cb1 = (CheckBox)this.findViewById(R.id.checkbox1);btn1 = (Button)this.findViewById(R.id.button01);btn2 = (Button)this.findViewById(R.id.button02);//响应事件myEdit1.setOnKeyListener(new OnKeyListener() {@Overridepublic boolean onKey(View v, int keyCode, KeyEvent event) {// TODO Auto-generated method stubmyEdit1.setText("");return false;}});myEdit1.setOnFocusChangeListener(new OnFocusChangeListener() {@Overridepublic void onFocusChange(View v, boolean hasFocus) {// TODO Auto-generated method stub//使用toast显示内容Toast.makeText(getApplicationContext(),myEdit1.getText(), Toast.LENGTH_LONG);}});myEdit2.setOnKeyListener(new OnKeyListener() {@Overridepublic boolean onKey(View v, int keyCode, KeyEvent event) {// TODO Auto-generated method stubmyEdit2.setText("");return false;}});myEdit2.setOnFocusChangeListener(new OnFocusChangeListener() {@Overridepublic void onFocusChange(View v, boolean hasFocus) {// TODO Auto-generated method stub//使用toast显示内容myEdit1.setText("获取焦点");//Toast.makeText(getApplicationContext(),myEdit2.getText(), Toast.LENGTH_SHORT);}});cb1.setOnCheckedChangeListener(new OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {// TODO Auto-generated method stubToast.makeText(getApplicationContext(),cb1.isChecked()+"",Toast.LENGTH_LONG);}});btn1.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubToast.makeText(getApplicationContext(),btn1.getText(),Toast.LENGTH_LONG);}});btn2.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubToast.makeText(getApplicationContext(),btn2.getText(),Toast.LENGTH_LONG);}});}}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <TableLayout        android:id="@+id/tableLayout1"        android:layout_width="wrap_content"        android:layout_height="wrap_content" >        <TableRow>            <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/username" />                    <EditText        android:id="@+id/editText1"        android:text="admin"        android:layout_width="fill_parent"        android:scrollHorizontally="true"></EditText>        </TableRow>                <TableRow>            <TextView        android:id="@+id/textView2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/password" />                   <EditText        android:id="@+id/editText2"        android:password="true"        android:text="123"        android:layout_width="fill_parent"        android:scrollHorizontally="true"></EditText>        </TableRow>                 <TableRow>            <TextView        android:id="@+id/textView3"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/autoLogin" />                 <CheckBox               android:text=""              android:id="@+id/checkbox1"              android:layout_width="wrap_content"              android:layout_height="wrap_content">          </CheckBox>        </TableRow>                  <TableRow>          <Button android:text="login" android:id="@+id/button01"/>          <Button android:text="canncel" android:id="@+id/button02"/>        </TableRow>             </TableLayout></LinearLayout>

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