4.8 自定义下拉菜单模式---Spinner与setDropDownViewResource
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package com.chaowen;import android.app.Activity;import android.os.Bundle;import android.view.MotionEvent;import android.view.View;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Spinner;import android.widget.TextView;public class Ex04_08_spinner extends Activity {private static final String[] countriesStr = {"北京","上海","天津","广东"}; private TextView myTextView; private Spinner mySpinner; private ArrayAdapter<String> adapter; Animation myAnimation; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); myTextView = (TextView) findViewById(R.id.myTextView); mySpinner = (Spinner) findViewById(R.id.mySpinner); adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, countriesStr); //myspinner_dropdown为自定义下拉菜单样式 定义在res/layout目录下 adapter.setDropDownViewResource(R.layout.myspinner_dropdown); //将ArrayAdapter添加到Spinner对象中 mySpinner.setAdapter(adapter); //将mySpinner添加OnItemSelectedListener mySpinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) { //将所选mySpinnner的值带入myTextview myTextView.setText("选择的是" + countriesStr[arg2]); //将mySpinner显示 arg0.setVisibility(View.VISIBLE); } @Override public void onNothingSelected(AdapterView<?> arg0) { // TODO Auto-generated method stub } }); //取得Animation定义在res/anim目录 myAnimation = AnimationUtils.loadAnimation(this, R.anim.my_anim); //将mySpinner添加OnTouchListener mySpinner.setOnTouchListener(new Spinner.OnTouchListener() {@Overridepublic boolean onTouch(View v, MotionEvent event) { //将mySpinner运行Animation v.startAnimation(myAnimation); //将mySpinner隐藏 v.setVisibility(View.INVISIBLE); return false;} }); mySpinner.setOnFocusChangeListener(new Spinner.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { // TODO Auto-generated method stub } }); }}?
?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" android:background="@drawable/white" > <TextView android:id="@+id/myTextView" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/title" android:textColor="@drawable/black" > </TextView> <Spinner android:id="@+id/mySpinner" android:layout_width="fill_parent" android:layout_height="wrap_content" > </Spinner></LinearLayout>
???myspinner_dropdown.xml
??<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text1" android:layout_width="wrap_content" android:layout_height="24sp" android:singleLine="true" style="?android:attr/spinnerDropDownItemStyle" />
?? my_anim.xml
??<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"> <translate android:fromXDelta="0" android:toXDelta="-100%p" android:duration="300" > </translate> <alpha android:fromAlpha="1.0" android:toAlpha="0.0" android:duration="300"> </alpha></set>
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