android开发综合应用之打分应用

该程序是一个listView跟ratingbar综合的应用示例。先上代码如下：

main.java

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import java.util.ArrayList;import java.util.List;import android.app.AlertDialog;import android.app.ListActivity;import android.content.Context;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.RatingBar;import android.widget.SimpleAdapter;import android.widget.TextView;import android.widget.AdapterView.OnItemSelectedListener;public class Main extends ListActivity{private static String[] applicationNames = new String[]{ "多功能日历", "eoeMarket客户端", "耐玩的重力消砖块", "白社会", "电池管家" };private static String[] authors = new String[]{ "张三", "eoemobile", "小费", "ApkHome", "lucyfa" };private static int[] resIds = new int[]{ R.drawable.calendar, R.drawable.eoemarket, R.drawable.brick,R.drawable.whitesociety, R.drawable.terminater };private static float[] applicationRating = new float[]{ (float) 5.0, (float) 5.0, (float) 3.5, (float) 5.0, (float) 4.0 };String inflater = Context.LAYOUT_INFLATER_SERVICE;LayoutInflater layoutInflater;private RatingAdapter raAdapter;/** * 自定义适配器， * 因为simpleAdapter只支持textView,imagesView,或是想Checkable接口的类，所以这里不能使用； * @author lyj * */private class RatingAdapter extends BaseAdapter{private Context context;public RatingAdapter(Context context){this.context = context;//获取扩展对象，用于操作布局文件layoutInflater = (LayoutInflater) context.getSystemService(inflater);}@Overridepublic int getCount(){return applicationNames.length;}@Overridepublic Object getItem(int position){return applicationNames[position];}@Overridepublic long getItemId(int position){return position;}public void setRating(int position, float rating){applicationRating[position] = rating;//更新数据notifyDataSetChanged();}/** * 设置列表项值，返回定义视图 */@Overridepublic View getView(int position, View convertView, ViewGroup parent){//获取布局对象，进行布局文件里的组件操作LinearLayout linearLayout = (LinearLayout) layoutInflater.inflate(R.layout.main, null);ImageView ivLogo = (ImageView) linearLayout.findViewById(R.id.ivLogo);TextView tvApplicationName = ((TextView) linearLayout.findViewById(R.id.tvApplicationName));TextView tvAuthor = (TextView) linearLayout.findViewById(R.id.tvAuthor);TextView tvRating = (TextView) linearLayout.findViewById(R.id.tvRating);RatingBar ratingBar = (RatingBar) linearLayout.findViewById(R.id.ratingbar);ivLogo.setImageResource(resIds[position]);tvApplicationName.setText(applicationNames[position]);tvAuthor.setText(authors[position]);tvRating.setText(String.valueOf(applicationRating[position]));ratingBar.setRating(applicationRating[position]);return linearLayout;}}@Overrideprotected void onListItemClick(ListView l, View view, final int position,long id){View myView = getLayoutInflater().inflate(R.layout.rating, null);final RatingBar ratingBar = (RatingBar) myView.findViewById(R.id.ratingbar);ratingBar.setRating(applicationRating[position]);new AlertDialog.Builder(this).setTitle(applicationNames[position]).setMessage("给应用程序打分").setIcon(resIds[position]).setView(myView).setPositiveButton("确定", new OnClickListener(){@Overridepublic void onClick(DialogInterface dialog, int which){raAdapter.setRating(position, ratingBar.getRating());}}).setNegativeButton("取消", null).show();}@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);List<View> viewList = new ArrayList<View>();viewList.add(getLayoutInflater().inflate(R.layout.main, null));raAdapter = new RatingAdapter(this);setListAdapter(raAdapter);}}

?程序中使用到了自定义的适配器，不熟悉adapter的朋友可以先去查阅下资料。

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布局文件：

main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="horizontal" android:layout_width="fill_parent"android:layout_height="wrap_content" android:gravity="center_vertical"><ImageView android:id="@+id/ivLogo" android:layout_width="60dp"android:layout_height="60dp" android:src="@drawable/icon"android:paddingLeft="5dp" /><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="wrap_content"android:layout_height="wrap_content" android:gravity="right"android:padding="10dp"><TextView android:id="@+id/tvApplicationName"android:layout_width="wrap_content" android:layout_height="wrap_content"android:textSize="16dp" /><TextView android:id="@+id/tvAuthor" android:layout_width="wrap_content"android:layout_height="wrap_content" android:layout_below="@id/tvApplicationName"android:textSize="14dp" /></RelativeLayout><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="fill_parent"android:layout_height="wrap_content" android:gravity="right"android:padding="10dp"><TextView android:id="@+id/tvRating" android:layout_width="wrap_content"android:layout_height="wrap_content" android:text="5.0" /><RatingBar android:id="@+id/ratingbar" android:layout_width="wrap_content"android:layout_height="wrap_content" android:numStars="5"style="?android:attr/ratingBarStyleSmall" android:layout_below="@id/tvRating" /></RelativeLayout></LinearLayout>

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弹出对话框的布局文件：

rating.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="horizontal" android:layout_width="fill_parent"android:layout_height="wrap_content" android:gravity="center_vertical"><RatingBar android:id="@+id/ratingbar" android:layout_width="wrap_content"android:layout_height="wrap_content" android:numStars="5"/></LinearLayout>

?运行结果：

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