Androidアプリケーション開発UI(ドロップダウンリスト)
Androidプラットフォームでドロップダウンリストを使用したSpinnerコンポーネントの効果図は以下の通りです.
コード:
1,res/values/string.xml
2,res/layout/main.xml
3.Activityクラス
コード:
1,res/values/string.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="title_tx"> : :</string>
<string name="app_name"> (Spinner)</string>
<string name="about_80080088"> , http://www.80080088.com 。</string>
</resources>
2,res/layout/main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/title_tx"
android:id="@+id/title_tx"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/about_80080088"
android:id="@+id/about_80080088">
</TextView>
<Spinner
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/spinnerAge">
</Spinner>
</LinearLayout>
3.Activityクラス
package com.cottsoft.android;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;
public class A008Activity extends Activity {
private static final String[] m_Ages = {"0 18 ","19 30 ","31 60 ","61 80 ","81 "};
private TextView m_title_tx,m_about_80080088;
private Spinner m_Spinner;
private ArrayAdapter<String> adapter;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
m_title_tx = (TextView) findViewById(R.id.title_tx);
m_about_80080088=(TextView) findViewById(R.id.about_80080088);
m_Spinner = (Spinner) findViewById(R.id.spinnerAge);
m_title_tx.setTextSize(22);
m_about_80080088.setTextSize(15);
m_about_80080088.setTextColor(Color.GRAY);
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,m_Ages);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
m_Spinner.setAdapter(adapter);
m_Spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
m_title_tx.setText(getResources().getString(R.string.title_tx)+m_Ages[arg2]);
arg0.setVisibility(View.VISIBLE);
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
}
}