Android中使用ListView實現漂亮的表格效果

在這裡我們要使用Android ListView來實現顯示股票行情，效果圖如下，紅色表示股票價格上漲，綠色表示股票價格下跌。

第一步、定義color.xml如下：
復制代碼 代碼如下:
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="color_dark_grey">#808080</color>
    <color name="color_black">#000000</color>
    <color name="color_green">#00FF00</color>
    <color name="color_red">#FF0000</color>
    <color name="color_white">#FFFFFF</color>
</resources>

第二步、定義style.xml文件如下：
復制代碼 代碼如下:
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <!-- Define the list items style begin -->
    <style name="list_item_seperator_layout">
        <item name="android:layout_width">fill_parent</item>
        <item name="android:layout_height">1dip</item>
        <item name="android:background">@color/color_dark_grey</item>
    </style>
    <style name="list_item_cell_seperator_layout">
        <item name="android:layout_width">1dip</item>
        <item name="android:layout_height">fill_parent</item>
        <item name="android:background">@color/color_dark_grey</item>
    </style>
    <!-- Define the list items style end -->
</resources>

第三步、定義ListHeader的layout文件，stock_list_header.xml如下：
復制代碼 代碼如下:
<?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="wrap_content">
    <TableLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:stretchColumns="3">
        <TableRow
            android:id="@+id/stock_list_header_row">
            <View
               
                />
            <TextView
                android:id="@+id/stock_list_header_code"
                android:text="@string/stock_code"
                android:layout_width="60dip"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:padding="2dip"
                />
            <View
               
                />
            <TextView
                android:id="@+id/stock_list_header_symbol"
                android:text="@string/stock_symbol"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:padding="2dip"
                />
            <View
               
                />
            <TextView
                android:id="@+id/stock_list_header_last_price"
                android:text="@string/stock_last_price"
                android:layout_width="60dip"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:padding="2dip"
                />
            <View
               
                />
            <TextView
                android:id="@+id/stock_list_header_price_change"
                android:text="@string/stock_price_change"
                android:layout_width="50dip"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:padding="2dip"
                />
            <View
               
                />
            <TextView
                android:id="@+id/stock_list_header_price_change_percentage"
                android:text="@string/stock_price_change_percent"
                android:layout_width="50dip"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:padding="2dip"
                />
            <View
               
                />
        </TableRow>
    </TableLayout>
</LinearLayout>

<View />是用來在每個單元格之間顯示出一條垂直的分割線，使單元格之間相互分割開來。

第四步、定義ListItem的布局文件，stock_list_item.xml如下：

復制代碼 代碼如下:
<?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">
    <TableLayout
        android:id="@+id/stock_list_item_table_layout"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:stretchColumns="3">
        <TableRow
            android:id="@+id/stock_list_row">
            <View
               
                />
            <TextView
                android:id="@+id/stock_code"
                android:layout_width="60dip"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:padding="2dip" />
            <View
               
                />
            <TextView
                android:id="@+id/stock_symbol"
                android:layout_width="1dip"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:padding="2dip"
                />
            <View
               
                />
            <TextView android:id="@+id/stock_last_price"
                android:layout_width="60dip"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:padding="2dip"
                />
            <View
               
                />
            <TextView
                android:id="@+id/stock_change_price"
                android:layout_width="50dip"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:padding="2dip"
                />
            <View
               
                />
            <TextView
                android:id="@+id/stock_change_percentage"
                android:layout_width="50dip"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:padding="2dip"
                />
            <View
               
                />
        </TableRow>
    </TableLayout>
</LinearLayout>

第五步、定義stock list activity的layout文件stock_list.xml如下：
復制代碼 代碼如下:
<?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">
    <View
       
        />
    <include
        layout="@layout/stock_list_header"
        />
    <View
       
        />
    <ListView
        android:id="@+id/stock_list_view"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:scrollingCache="true"
        android:cacheColorHint="#00000000"
        android:fastScrollEnabled="true"
        android:focusable="true"
        android:divider="@color/color_dark_grey"
        android:dividerHeight="1dip"
        />
</LinearLayout>

<View />是為了在Header的上下方顯示一條線來分割header和list.可能有人會問，為什麼這裡不直接用ListView控件的header呢？

這是因為我們為了使ListView在滾動過程中header始終固定在List的最上方，不會隨著ListView的滾動而消失。

到此為止，layout布局文件基本上定義完了，下面就是如何在代碼中實現了。

StockListActivity.java

復制代碼 代碼如下:
package com.android.msoft.mfinance.ui;

import com.android.msoft.mfinance.R;
import com.android.msoft.mfinance.provider.Stock;
import com.android.msoft.mfinance.provider.StockMarket.StockMarketColumns;
import com.android.msoft.mfinance.ui.MFinancePreferenceActivity.BGColor;
import com.android.msoft.mfinance.ui.MFinancePreferenceActivity.TextSize;
import com.android.msoft.mfinance.ui.MFinancePreferenceActivity.UpDownColor;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;
import android.util.TypedValue;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.WindowManager;
import android.widget.ListView;
import android.widget.TableRow;
import android.widget.TextView;

public class StockListActivity extends Activity {

 private static final String TAG = "com.android.msoft.mfinance.ui.StockListActivity";
 private SharedPreferences mPreference;
 private TextView mCodeTextView;
 private TextView mSymbolTextView;
 private TextView mLastPriceTextView;
 private TextView mPriceChangeTextView;
 private TextView mPriceChangePercentageTextView;
 private ListView mStockListView;
 private TableRow mStockListHeader;
 private float mTextSize;

 private int mBgColor;
 private int mDownTextColor;
 private int mUpTextColor;
 private Cursor mStockListCursor;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
    WindowManager.LayoutParams.FLAG_FULLSCREEN);
  setContentView(R.layout.stock_list);

  mPreference = PreferenceManager.getDefaultSharedPreferences(this);

  refreshDisplayPreference();

  mStockListHeader = (TableRow) findViewById(R.id.stock_list_header_row);
  mCodeTextView = (TextView) findViewById(R.id.stock_list_header_code);
  mSymbolTextView = (TextView) findViewById(R.id.stock_list_header_symbol);
  mLastPriceTextView = (TextView) findViewById(R.id.stock_list_header_last_price);
  mPriceChangeTextView = (TextView) findViewById(R.id.stock_list_header_price_change);
  mPriceChangePercentageTextView = (TextView) findViewById(R.id.stock_list_header_price_change_percentage);

  mStockListView = (ListView) findViewById(R.id.stock_list_view);

  refreshStockListHeader();

  mStockListCursor = getContentResolver().query(
    Stock.CONTENT_URI_STOCK_WITH_MARKET, null, null, null,
    StockMarketColumns.CHANGE_PRICE_PERCENT + " DESC");

  StockListAdapter listViewAdpater = new StockListAdapter(this,
    mStockListCursor);
  mStockListView.setAdapter(listViewAdpater);
 }

 @Override
 protected void onDestroy() {
  if (!mStockListCursor.isClosed()) {
   mStockListCursor.close();
  }

  super.onDestroy();
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {

  MenuInflater inflater = getMenuInflater();
  inflater.inflate(R.menu.stock_list_option_menu, menu);
  return super.onCreateOptionsMenu(menu);
 }

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  switch (item.getItemId()) {
  case R.id.stock_list_option_menu_settings:
   Intent intent = new Intent(this, MFinancePreferenceActivity.class);
   startActivity(intent);
   break;
  }

  return super.onOptionsItemSelected(item);
 }

 private void refreshDisplayPreference() {

  UpDownColor upAndDownColor = MFinancePreferenceActivity.UpDownColor
    .valueOf(mPreference.getString("up_down_color", "RED_GREEN"));

  if (0 == upAndDownColor.value) { // UP: RED DOWN: GREEN
   mUpTextColor = getResources().getColor(R.color.color_red);
   mDownTextColor = getResources().getColor(R.color.color_green);
  } else { // DOWN: RED UP: GREEN
   mUpTextColor = getResources().getColor(R.color.color_green);
   mDownTextColor = getResources().getColor(R.color.color_red);
  }

  TextSize textSize = MFinancePreferenceActivity.TextSize
    .valueOf(mPreference.getString("text_size", "NORMAL"));
  mTextSize = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
    textSize.value, getResources().getDisplayMetrics());

  int colorResId = R.color.color_black;
  BGColor bgColor = MFinancePreferenceActivity.BGColor
    .valueOf(mPreference.getString("bg_color", "BLACK"));

  switch (bgColor.value) {
  case 0:
   colorResId = R.color.color_black;
   break;

  case 1:
   colorResId = R.color.color_white;
   break;

  default:
   Log.e(TAG, "invalid bg color");
  }

  mBgColor = getResources().getColor(colorResId);
 }

 public float getTextSize() {
  return mTextSize;
 }

 public int getBgColor() {
  return mBgColor;
 }

 public int getUpTextColor() {
  return mUpTextColor;
 }

 public int getDownTextColor() {
  return mDownTextColor;
 }

 private void refreshStockListHeader() {

  mCodeTextView.setTextSize(mTextSize);
  mSymbolTextView.setTextSize(mTextSize);
  mLastPriceTextView.setTextSize(mTextSize);
  mPriceChangeTextView.setTextSize(mTextSize);
  mPriceChangePercentageTextView.setTextSize(mTextSize);

  mStockListHeader.setBackgroundColor(mBgColor);
  mStockListView.setBackgroundColor(mBgColor);
 }
}

StockListAdapter.java

復制代碼 代碼如下:
package com.android.msoft.mfinance.ui;

import com.android.msoft.mfinance.provider.Stock.StockColumns;
import com.android.msoft.mfinance.provider.StockMarket.StockMarketColumns;
import android.content.Context;
import android.database.Cursor;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;

public class StockListAdapter extends BaseAdapter {

 private static final String TAG = "com.android.msoft.mfinance.ui.StockListAdapter";
 private Cursor mStockListCursor;
 private Context mContext;

 private final int sCodeIndex;
 private final int sSymbolIndex;
 private final int sBoardIndex;
 private final int sLastPriceIndex;
 private final int sChangePriceIndex;
 private final int sChangePricePercentIndex;

 public StockListAdapter(Context context, Cursor cursor) {
  mStockListCursor = cursor;
  mContext = context;

  sCodeIndex = mStockListCursor.getColumnIndex(StockColumns.CODE);
  sSymbolIndex = mStockListCursor.getColumnIndex(StockColumns.SYMBOL);
  sBoardIndex = mStockListCursor.getColumnIndex(StockColumns.BOARD);
  sLastPriceIndex = mStockListCursor
    .getColumnIndex(StockMarketColumns.LAST_PRICE);
  sChangePriceIndex = mStockListCursor
    .getColumnIndex(StockMarketColumns.CHANGE_PRICE);
  sChangePricePercentIndex = mStockListCursor
    .getColumnIndex(StockMarketColumns.CHANGE_PRICE_PERCENT);
 }

 @Override
 public int getCount() {
  Log.d(TAG, "Stock list count:" + mStockListCursor.getCount());
  return mStockListCursor.getCount();
 }

 @Override
 public Object getItem(int position) {
  return null;
 }

 @Override
 public long getItemId(int position) {
  return position;
 }

 @Override
 public View getView(int position, View convertView, ViewGroup parent) {
  StockListItem listItem;

  mStockListCursor.moveToPosition(position);
  if (null == convertView) {
   String code = mStockListCursor.getString(sCodeIndex);
   String symbol = mStockListCursor.getString(sSymbolIndex);
   String board = mStockListCursor.getString(sBoardIndex);
   float lastPrice = mStockListCursor.getFloat(sLastPriceIndex);
   float changePrice = mStockListCursor.getFloat(sChangePriceIndex);
   float changePercent = mStockListCursor
     .getFloat(sChangePricePercentIndex);

   listItem = new StockListItem(mContext, code, symbol, board,
     lastPrice, changePrice, changePercent);
  } else {
   listItem = (StockListItem) convertView;
  }

  return listItem;
 }

}

StockListItem.java

復制代碼 代碼如下:
package com.android.msoft.mfinance.ui;

import com.android.msoft.mfinance.R;
import android.content.Context;
import android.view.LayoutInflater;
import android.widget.LinearLayout;
import android.widget.TextView;

public class StockListItem extends LinearLayout {

 public StockListItem(Context context, String code, String symbol,
   String board, float lastPrice, float changePrice,
   float changePercent) {
  super(context);

  StockListActivity stockListActivity = (StockListActivity) context;
  float textSize = stockListActivity.getTextSize();

  LayoutInflater factory = LayoutInflater.from(context);
  factory.inflate(R.layout.stock_list_item, this);

  TextView codeTextView = (TextView) findViewById(R.id.stock_code);
  codeTextView.setTextSize(textSize);
  codeTextView.setText(code);

  TextView symbolTextView = (TextView) findViewById(R.id.stock_symbol);
  symbolTextView.setTextSize(textSize);
  symbolTextView.setText(symbol);

  TextView lastPriceTextView = (TextView) findViewById(R.id.stock_last_price);
  lastPriceTextView.setTextSize(textSize);
  lastPriceTextView.setText(Float.toString(lastPrice));

  TextView changePriceTextView = (TextView) findViewById(R.id.stock_change_price);
  changePriceTextView.setTextSize(textSize);
  changePriceTextView.setText(Float.toString(changePrice));

  TextView ChangePercentTextView = (TextView) findViewById(R.id.stock_change_percentage);
  ChangePercentTextView.setTextSize(textSize);
  ChangePercentTextView.setText(Float.toString(changePercent));

  if (changePrice > 0) {
   int textColor = stockListActivity.getUpTextColor();

   // codeTextView.setTextColor(textColor);
   // symbolTextView.setTextColor(textColor);
   lastPriceTextView.setTextColor(textColor);
   changePriceTextView.setTextColor(textColor);
   ChangePercentTextView.setTextColor(textColor);
  }
  else if (changePrice < 0)
  {
            int textcolor="stockListActivity.getDownTextColor(); codetextview.settextcolor(textcolor);
   symboltextview.settextcolor(textcolor);
   lastpricetextview.settextcolor(textcolor); changepricetextview.settextcolor(textcolor);
      changepercenttextview.settextcolor(textcolor)
     }
    }
 }

到此就大功告成了，這個例子我們是通過View來畫線條分割各個單元格的，另外我們還可以通過定義不同的背景色，通過背景色來達到相似的效果，這個不難，就不寫了。