Android--OnKeyListner

main.xml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); // 生命周期方法
		super.setContentView(R.layout.main); // 設置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：