EditText和TextView的应用

package com.v;

import com.v.R;

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.widget.EditText;
import android.widget.TextView;

public class EditActivityActivity extends Activity {
/** Called when the activity is first created. */
private TextView tv;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final EditText myet1=(EditText)findViewById(R.id.myEditText);
tv=((TextView)findViewById(R.id.myTextView));
myet1.setOnKeyListener(new OnKeyListener() {

@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
myet1.invalidate(); //回车刷新后才显示内容
tv.setText(myet1.getText().toString());
return false;
}
});
}
}

 

main.xml中的设计:

<?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" >

<EditText
android:id="@+id/myEditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="18sp"
android:autoText="true"
android:capitalize="sentences"
android:text=" "
android:password="true"
android:hint="在这里输入的密码信息将显示在下面的TextView中"/>

<TextView
android:id="@+id/myTextView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
</LinearLayout>

 

运行的结果：