Android連接服務器數據庫查詢+Gson解析（List和Map）格式json數據（二）

1、Android主要代碼

package com.pdsu.libsys;

import java.lang.reflect.Field;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.json.JSONObject;

import com.android.volley.Request.Method;
import com.android.volley.AuthFailureError;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import com.google.gson.Gson;
import com.google.gson.JsonObject;
import com.google.gson.reflect.TypeToken;
import com.pdsu.book.user.Book;

import android.app.ActionBar;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.SearchView;
import android.widget.SearchView.OnQueryTextListener;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

public class SelectActivity extends Activity implements OnItemSelectedListener,
		OnQueryTextListener {
	protected static final String TAG = "SelectActivity";
	private Spinner mSpinner;
	private ArrayAdapter<String> adapter;
	private List<String> list = new ArrayList<String>();
	private SearchView mSearchView;

	private TextView bookNameTextView, bookISBNTextView, bookAuthorTextView,
			bookTypeTextView, bookLoactionTextView, bookSaveNumTextView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_select);
		ActionBar bar = getActionBar();
		bar.setHomeButtonEnabled(true);
		bar.setDisplayHomeAsUpEnabled(true);
		bar.setBackgroundDrawable(getWallpaper());
		initView();
		mSearchView = (SearchView) findViewById(R.id.search_view);
		mSearchView.setIconifiedByDefault(false);
		mSearchView.setSubmitButtonEnabled(true);
		mSearchView.setIconifiedByDefault(false);
		int search_mag_icon_id = mSearchView.getContext().getResources()
				.getIdentifier("android:id/search_mag_icon", null, null);
		ImageView search_mag_icon = (ImageView) mSearchView
				.findViewById(search_mag_icon_id);// 獲取搜索圖標
		search_mag_icon.setImageResource(R.drawable.search_button_default);// 圖標都是用src的

		// 修改爲展開時的搜索圖標
		// Field mSearchButton = argClass.getDeclaredField("mSearchButton");
		mSpinner = (Spinner) findViewById(R.id.sp_select);

		list.add("文學名著");
		list.add("雜誌期刊");
		list.add("學術文獻");
		list.add("當代文學");
		list.add("館藏資料");

		// 第二步：爲下拉列表定義一個適配器，這裏就用到裏前面定義的list。
		adapter = new ArrayAdapter<String>(this,
				android.R.layout.simple_spinner_item, list);
		mSpinner.setAdapter(adapter);
		mSpinner.setOnItemSelectedListener(this);
		mSearchView.setOnQueryTextListener(this);
	}

	private void initView() {
		// TODO Auto-generated method stub
		bookNameTextView = (TextView) findViewById(R.id.book_name);
		bookISBNTextView = (TextView) findViewById(R.id.book_ISBN);
		bookAuthorTextView = (TextView) findViewById(R.id.book_author);
		bookTypeTextView = (TextView) findViewById(R.id.book_type);
		bookLoactionTextView = (TextView) findViewById(R.id.book_location);
		bookSaveNumTextView = (TextView) findViewById(R.id.book_saveNum);
	}

	@Override
	public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
			long arg3) {
		// TODO Auto-generated method stub
		switch (arg2) {
		case 0:
			// Toast.makeText(SelectActivity.this,
			// "您選擇了： " + arg2 + list.get(arg2), 0).show();
			break;
		case 1:
			// Toast.makeText(SelectActivity.this,
			// "您選擇了： " + arg2 + list.get(arg2), 0).show();

			break;
		case 2:
			// Toast.makeText(SelectActivity.this,
			// "您選擇了： " + arg2 + list.get(arg2), 0).show();
			break;
		case 3:
			// Toast.makeText(SelectActivity.this,
			// "您選擇了： " + arg2 + list.get(arg2), 0).show();
			break;
		case 4:
			// Toast.makeText(SelectActivity.this,
			// "您選擇了： " + arg2 + list.get(arg2), 0).show();
			break;
		}
	}

	@Override
	public void onNothingSelected(AdapterView<?> arg0) {
		// TODO Auto-generated method stub

	}

	@Override
	public boolean onQueryTextChange(String arg0) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public boolean onQueryTextSubmit(final String arg0) {
		// 進行搜索操作
		final String dataString = arg0;
		// Toast.makeText(SelectActivity.this, "您選擇了： " + arg0, 0).show();
		RequestQueue queue = Volley.newRequestQueue(SelectActivity.this);
		String url = "http://192.168.0.191:8080/libsys/select";
		StringRequest request = new StringRequest(Method.POST, url,
				new Response.Listener<String>() {

					@Override
					public void onResponse(String response) {
						Gson gson = new Gson();
						List<Book> books = new ArrayList<Book>();
						Type type = new TypeToken<ArrayList<Book>>() {
						}.getType();
						books = gson.fromJson(response, type);
						for (Book book : books) {
							bookNameTextView.setText("書名： "
									+ book.getBookName());
							bookISBNTextView.setText("ISBN： "
									+ book.getBookISBN());
							bookAuthorTextView.setText("作者： "
									+ book.getBookAuthor());
							bookTypeTextView.setText("分類： "
									+ book.getBookType());
							bookLoactionTextView.setText("館藏地址： "
									+ book.getBookLocation());
							bookSaveNumTextView.setText("館藏數量： "
									+ book.getBookSaveNum());
						}

					}
				}

				, new Response.ErrorListener() {

					@Override
					public void onErrorResponse(VolleyError error) {
						// TODO Auto-generated method stub
						Toast.makeText(SelectActivity.this, "獲取數據失敗，請檢查網絡", 0)
								.show();
						Log.e(TAG, error.toString());
					}
				}) {
			@Override
			public Map<String, String> getParams() throws AuthFailureError {
				// TODO Auto-generated method stub
				Map<String, String> map = new HashMap<String, String>();
				map.put("bookinfo", arg0);
				return map;
			}
		};
		queue.add(request);
		return false;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		if (item.isCheckable()) {
			item.setCheckable(true);
		}
		switch (item.getItemId()) {
		case android.R.id.home:
			this.finish();
			break;
		default:
			break;
		}
		return true;
	}
}

2、佈局文件.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/bj2x"
    android:orientation="vertical"
    tools:context="${relativePackage}.${activityClass}" >

    <Spinner
        android:id="@+id/sp_select"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:focusableInTouchMode="true" >
    </Spinner>

    <SearchView
        android:id="@+id/search_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:focusableInTouchMode="true"
        android:iconifiedByDefault="true"
        android:imeOptions="actionSearch"
        android:inputType="textCapWords"
        android:queryHint="文學" />

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:id="@+id/book_name"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="16dp"
            android:text="書名：" />
    </ScrollView>

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:id="@+id/book_author"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="16dp"
            android:text="作者：" />
    </ScrollView>

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:id="@+id/book_ISBN"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="16dp"
            android:text="ISBN：" />
    </ScrollView>

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:id="@+id/book_type"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="16dp"
            android:text="分類：" />
    </ScrollView>

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:id="@+id/book_location"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="16dp"
            android:text="館藏位置：" />
    </ScrollView>

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:id="@+id/book_saveNum"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="16dp"
            android:text="館藏數量：" />
    </ScrollView>

</LinearLayout>

3、相關的Jar包

android-support-v4.jar
core.jar
gson-2.2.1-javadoc.jar
gson-2.2.1.jar
volley.jar