Android--OnKeyListner

Android--OnKeyListner

main.xml代碼如下：

 

.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 {private TextView txt=null;private EditText edit=null;public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState); // 生命週期方法super.setContentView(R.layout.main); // 設定要使用的布局管理器this.edit=(EditText)super.findViewById(R.id.edit);this.txt=(TextView)super.findViewById(R.id.text);this.edit.setOnKeyListener(new OnKeyListenerImpl());}private class OnKeyListenerImpl implements OnKeyListener{public boolean onKey(View arg0, int arg1, KeyEvent arg2) {String str=Hello.this.edit.getText().toString();Hello.this.txt.setText(str);return false;}}}

 

運行如下：