Android(安卓)EditText example

main.xml

<?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/editText"
android:layout_width="match_parent"
android:layout_height="wrap_content" >

<requestFocus />

</EditText>

</LinearLayout>

EditDemoActivity.java

package com.cjp.editdemo;

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.Toast;

public class EditDemoActivity extends Activity {

private EditText edittext;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

addKeyListener();
}

public void addKeyListener() {

// get edittext component
edittext = (EditText) findViewById(R.id.editText);

// add a keylistener to keep track user input
edittext.setOnKeyListener(new OnKeyListener() {
public boolean onKey(View v, int keyCode, KeyEvent event) {

// if keydown and "enter" is pressed
if ((event.getAction() == KeyEvent.ACTION_DOWN)
&& (keyCode == KeyEvent.KEYCODE_ENTER)) {

// display a floating message
Toast.makeText(EditDemoActivity.this,
edittext.getText(), Toast.LENGTH_LONG).show();
return true;

} else if ((event.getAction() == KeyEvent.ACTION_DOWN)
&& (keyCode == KeyEvent.KEYCODE_9)) {

// display a floating message
Toast.makeText(EditDemoActivity.this,
"Number 9 is pressed!", Toast.LENGTH_LONG).show();
return true;
}

return false;
}
});
}
}

更多相关文章

随机推荐