Android--OnKeyListner

標籤：android   onkeylistener   

main.xml代碼如下：

<?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" >    <TextView        android:id="@+id/text"        android:layout_width="fill_parent"        android:layout_height="wrap_content"/>    <EditText        android:id="@+id/edit"        android:layout_width="fill_parent"        android:layout_height="wrap_content"/></LinearLayout>

.java代碼如下：

package org.lxh.demo;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.content.DialogInterface;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.EditText;import android.widget.TextView;public class Hello extends Activity {<span style="white-space:pre"></span>private TextView txt=null;<span style="white-space:pre"></span>private EditText edit=null;<span style="white-space:pre"></span>public void onCreate(Bundle savedInstanceState) {<span style="white-space:pre"></span>super.onCreate(savedInstanceState); // 生命週期方法<span style="white-space:pre"></span>super.setContentView(R.layout.main); // 設定要使用的布局管理器<span style="white-space:pre"></span>this.edit=(EditText)super.findViewById(R.id.edit);<span style="white-space:pre"></span>this.txt=(TextView)super.findViewById(R.id.text);<span style="white-space:pre"></span>this.edit.setOnKeyListener(new OnKeyListenerImpl());<span style="white-space:pre"></span>}<span style="white-space:pre"></span>private class OnKeyListenerImpl implements OnKeyListener{<span style="white-space:pre"></span>public boolean onKey(View arg0, int arg1, KeyEvent arg2) {<span style="white-space:pre"></span>String str=Hello.this.edit.getText().toString();<span style="white-space:pre"></span>Hello.this.txt.setText(str);<span style="white-space:pre"></span>return false;<span style="white-space:pre"></span>}<span style="white-space:pre"></span><span style="white-space:pre"></span>}}

運行如下：

Android--OnKeyListner