Android动态改变GridView的值【安卓进化二十二】
最近感觉GridView的用法比较灵活，比如写一些动态改变的东西，更新显示效果比较明显，所以我写了一个demo，选中球后，点击确定显示选中的球在主页面，点击重置，则选中的球都被清空。这个效果还是比较不错的！希望给大家启迪。项目图片我没有上传，有问题的请留言，想要源码的请留言，转载请标明出处：
http://blog.csdn.net/wdaming1986/article/details/6786444
我的csdn资源下载链接分享给大家，大家可以下载：
http://download.csdn.net/detail/wdaming1986/3611738
程序的主页面： 点击button按钮弹出dialog页面：
点击确定后的效果，点击重置如
选球，球的颜色会发生变化 第二张图片的效果，球没有选中的效果
代码奉上：
com.cn.daming包里面的类：
一、MainActivity.java类中的代码：
package com.cn.daming; import java.util.ArrayList; import android.app.Activity; import android.app.AlertDialog; import android.graphics.Color; import android.graphics.drawable.GradientDrawable; import android.graphics.drawable.GradientDrawable.Orientation; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.Button; import android.widget.GridView; import android.widget.Toast; public class MainActivity extends Activity { private GridView redBallGrid; private GridView blueBallGrid; private Button okButton; private Button resetButton; private Button dialog_button; private GridView showRedGridView; private GridView showBlueGridView; private AlertDialog show_ball_dialog; private View show_ball_dialog_view; public static ArrayList<Integer> redBallSelectArr= new ArrayList<Integer>(); public static ArrayList<Integer> blueBallSelectArr= new ArrayList<Integer>(); private int redNumLeft = 35,blueNumLeft = 16; private Integer[] changeimageid = { R.drawable.redball_dark01, R.drawable.redball_dark02, R.drawable.redball_dark03, R.drawable.redball_dark04, R.drawable.redball_dark05, R.drawable.redball_dark06, R.drawable.redball_dark07, R.drawable.redball_dark08, R.drawable.redball_dark09, R.drawable.redball_dark10, R.drawable.redball_dark11, R.drawable.redball_dark12, R.drawable.redball_dark13, R.drawable.redball_dark14, R.drawable.redball_dark15, R.drawable.redball_dark16, R.drawable.redball_dark17, R.drawable.redball_dark18, R.drawable.redball_dark19, R.drawable.redball_dark20, R.drawable.redball_dark21, R.drawable.redball_dark22, R.drawable.redball_dark23, R.drawable.redball_dark24, R.drawable.redball_dark25, R.drawable.redball_dark26, R.drawable.redball_dark27, R.drawable.redball_dark28, R.drawable.redball_dark29, R.drawable.redball_dark30, R.drawable.redball_dark31, R.drawable.redball_dark32, R.drawable.redball_dark33, R.drawable.redball_dark34, R.drawable.redball_dark35, }; private Integer[] mImageIds = { R.drawable.redball_01, R.drawable.redball_02, R.drawable.redball_03, R.drawable.redball_04, R.drawable.redball_05, R.drawable.redball_06, R.drawable.redball_07, R.drawable.redball_08, R.drawable.redball_09, R.drawable.redball_10, R.drawable.redball_11, R.drawable.redball_12, R.drawable.redball_13, R.drawable.redball_14, R.drawable.redball_15, R.drawable.redball_16, R.drawable.redball_17, R.drawable.redball_18, R.drawable.redball_19, R.drawable.redball_20, R.drawable.redball_21, R.drawable.redball_22, R.drawable.redball_23, R.drawable.redball_24, R.drawable.redball_25, R.drawable.redball_26, R.drawable.redball_27, R.drawable.redball_28, R.drawable.redball_29, R.drawable.redball_30, R.drawable.redball_31, R.drawable.redball_32, R.drawable.redball_33, R.drawable.redball_34, R.drawable.redball_35, }; private Integer[] blueBallIds = { R.drawable.blueball_01, R.drawable.blueball_02, R.drawable.blueball_03, R.drawable.blueball_04, R.drawable.blueball_05, R.drawable.blueball_06, R.drawable.blueball_07, R.drawable.blueball_08, R.drawable.blueball_09, R.drawable.blueball_10, R.drawable.blueball_11, R.drawable.blueball_12, R.drawable.blueball_13, R.drawable.blueball_14, R.drawable.blueball_15, R.drawable.blueball_16, }; private Integer[] blueBallChangeIds = { R.drawable.blueball_dark01, R.drawable.blueball_dark02, R.drawable.blueball_dark03, R.drawable.blueball_dark04, R.drawable.blueball_dark05, R.drawable.blueball_dark06, R.drawable.blueball_dark07, R.drawable.blueball_dark08, R.drawable.blueball_dark09, R.drawable.blueball_dark10, R.drawable.blueball_dark11, R.drawable.blueball_dark12, R.drawable.blueball_dark13, R.drawable.blueball_dark14, R.drawable.blueball_dark15, R.drawable.blueball_dark16, }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); drawBackground(); initSelectedBallArrayList(); initBall_GridView(); initDialog_Button(); } public void drawBackground() { GradientDrawable grad = new GradientDrawable( Orientation.TL_BR, new int[] { Color.rgb(0, 0, 127), Color.rgb(0, 0, 255), Color.rgb(127, 0, 255), Color.rgb(127, 127, 255), Color.rgb(127, 255, 255), Color.rgb(255, 255, 255) } ); this.getWindow().setBackgroundDrawable(grad); } private void initSelectedBallArrayList() { for(int i=0;i<35;i++){ redBallSelectArr.add(i,0); } for(int i=0;i<16;i++){ blueBallSelectArr.add(i,0); } } private void initBall_GridView() { showRedGridView = (GridView)findViewById(R.id.show_red_gridview); showBlueGridView = (GridView)findViewById(R.id.show_blue_gridview); } private void initDialog_Button() { dialog_button = (Button)findViewById(R.id.dialog_button); dialog_button.setOnClickListener(new OnClickListener(){ public void onClick(View arg0) { show_ball_dialog = new AlertDialog.Builder(MainActivity.this).create(); show_ball_dialog_view = View.inflate(MainActivity.this, R.layout.ball_grid_dialog, null); redBallGrid = (GridView)(show_ball_dialog_view).findViewById(R.id.red_ball_grid); blueBallGrid = (GridView)(show_ball_dialog_view).findViewById(R.id.blue_ball_grid); okButton = (Button)(show_ball_dialog_view).findViewById(R.id.Ok_Button); resetButton = (Button)(show_ball_dialog_view).findViewById(R.id.Reset_Button); redBallGrid.setAdapter(new ImageAdapter(MainActivity.this,MainActivity.this,redBallSelectArr)); blueBallGrid.setAdapter(new ImageAdapter(MainActivity.this,MainActivity.this,blueBallSelectArr)); show_ball_dialog.setView(show_ball_dialog_view); show_ball_dialog.show(); redBallGrid.setOnItemClickListener(new OnItemClickListener(){ public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { if(redNumLeft > 1){ if(redBallSelectArr.get(arg2) == 0){ arg1.setBackgroundResource(changeimageid[arg2]); redBallSelectArr.set(arg2,arg2+1); redNumLeft --; } else{ arg1.setBackgroundResource(mImageIds[arg2]); redBallSelectArr.set(arg2, 0); redNumLeft += 1; } } else{ if(redBallSelectArr.get(arg2) != 0){ arg1.setBackgroundResource(mImageIds[arg2]); redBallSelectArr.set(arg2, 0); redNumLeft +=1; }else{ Toast.makeText(MainActivity.this, "you choose enough",Toast.LENGTH_SHORT).show(); } } } }); blueBallGrid.setOnItemClickListener(new OnItemClickListener(){ public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { if(blueNumLeft > 1){ if(blueBallSelectArr.get(arg2) == 0){ arg1.setBackgroundResource(blueBallChangeIds[arg2]); blueBallSelectArr.set(arg2,arg2+1); blueNumLeft --; } else{ arg1.setBackgroundResource(blueBallIds[arg2]); blueBallSelectArr.set(arg2, 0); blueNumLeft += 1; } } else{ if(blueBallSelectArr.get(arg2) != 0){ arg1.setBackgroundResource(blueBallIds[arg2]); blueBallSelectArr.set(arg2, 0); blueNumLeft +=1; }else{ Toast.makeText(MainActivity.this, "you choose enough",Toast.LENGTH_SHORT).show(); } } } }); okButton.setOnClickListener(new OnClickListener(){ public void onClick(View arg0) { showRedGridView.setAdapter(new ShowBallArrayAdapter(MainActivity.this, MainActivity.this, redBallSelectArr)); showBlueGridView.setAdapter(new ShowBallArrayAdapter(MainActivity.this, MainActivity.this, blueBallSelectArr)); show_ball_dialog.dismiss(); } }); resetButton.setOnClickListener(new OnClickListener(){ public void onClick(View arg0) { redBallSelectArr.clear(); blueBallSelectArr.clear(); initSelectedBallArrayList(); redNumLeft = 36; blueNumLeft = 16; redBallGrid.setAdapter(new ImageAdapter(MainActivity.this,MainActivity.this,redBallSelectArr)); blueBallGrid.setAdapter(new ImageAdapter(MainActivity.this,MainActivity.this,blueBallSelectArr)); } }); } }); } }二、ImageAdapter.java类中的代码：
package com.cn.daming; import java.util.ArrayList; import android.content.Context; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.GridView; import android.widget.ImageView; public class ImageAdapter extends BaseAdapter { MainActivity activity; private Context mContext; ImageView imageView; private Integer[] mImageIds = { R.drawable.redball_01, R.drawable.redball_02, R.drawable.redball_03, R.drawable.redball_04, R.drawable.redball_05, R.drawable.redball_06, R.drawable.redball_07, R.drawable.redball_08, R.drawable.redball_09, R.drawable.redball_10, R.drawable.redball_11, R.drawable.redball_12, R.drawable.redball_13, R.drawable.redball_14, R.drawable.redball_15, R.drawable.redball_16, R.drawable.redball_17, R.drawable.redball_18, R.drawable.redball_19, R.drawable.redball_20, R.drawable.redball_21, R.drawable.redball_22, R.drawable.redball_23, R.drawable.redball_24, R.drawable.redball_25, R.drawable.redball_26, R.drawable.redball_27, R.drawable.redball_28, R.drawable.redball_29, R.drawable.redball_30, R.drawable.redball_31, R.drawable.redball_32, R.drawable.redball_33, R.drawable.redball_34, R.drawable.redball_35, }; private Integer[] changeimageid = { R.drawable.redball_dark01, R.drawable.redball_dark02, R.drawable.redball_dark03, R.drawable.redball_dark04, R.drawable.redball_dark05, R.drawable.redball_dark06, R.drawable.redball_dark07, R.drawable.redball_dark08, R.drawable.redball_dark09, R.drawable.redball_dark10, R.drawable.redball_dark11, R.drawable.redball_dark12, R.drawable.redball_dark13, R.drawable.redball_dark14, R.drawable.redball_dark15, R.drawable.redball_dark16, R.drawable.redball_dark17, R.drawable.redball_dark18, R.drawable.redball_dark19, R.drawable.redball_dark20, R.drawable.redball_dark21, R.drawable.redball_dark22, R.drawable.redball_dark23, R.drawable.redball_dark24, R.drawable.redball_dark25, R.drawable.redball_dark26, R.drawable.redball_dark27, R.drawable.redball_dark28, R.drawable.redball_dark29, R.drawable.redball_dark30, R.drawable.redball_dark31, R.drawable.redball_dark32, R.drawable.redball_dark33, R.drawable.redball_dark34, R.drawable.redball_dark35, }; private Integer[] blueBallIds = { R.drawable.blueball_01, R.drawable.blueball_02, R.drawable.blueball_03, R.drawable.blueball_04, R.drawable.blueball_05, R.drawable.blueball_06, R.drawable.blueball_07, R.drawable.blueball_08, R.drawable.blueball_09, R.drawable.blueball_10, R.drawable.blueball_11, R.drawable.blueball_12, R.drawable.blueball_13, R.drawable.blueball_14, R.drawable.blueball_15, R.drawable.blueball_16, }; private Integer[] blueBallChangeIds = { R.drawable.blueball_dark01, R.drawable.blueball_dark02, R.drawable.blueball_dark03, R.drawable.blueball_dark04, R.drawable.blueball_dark05, R.drawable.blueball_dark06, R.drawable.blueball_dark07, R.drawable.blueball_dark08, R.drawable.blueball_dark09, R.drawable.blueball_dark10, R.drawable.blueball_dark11, R.drawable.blueball_dark12, R.drawable.blueball_dark13, R.drawable.blueball_dark14, R.drawable.blueball_dark15, R.drawable.blueball_dark16, }; private ArrayList<Integer> filter = new ArrayList<Integer>(); public ImageAdapter(Context c,MainActivity a ,ArrayList<Integer> ballAL ) { activity = a; mContext = c; filter = ballAL; } public int getCount() { if (filter.size() == 35){ return 35; } else{ return 16; } } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } public View getView(final int position, View convertView, ViewGroup parent) { if (convertView == null) { imageView = new ImageView(mContext); imageView.setLayoutParams(new GridView.LayoutParams(24, 24)); imageView.setScaleType(ImageView.ScaleType.FIT_CENTER); } else { imageView = (ImageView) convertView; } if (filter.get(position) == 0 && filter.size()== 35){ imageView.setBackgroundResource(mImageIds[position]); } else if (filter.get(position) != 0 && filter.size()== 35){ imageView.setBackgroundResource(changeimageid[position]); } else if (filter.get(position) == 0 && filter.size() == 16){ imageView.setBackgroundResource(blueBallIds[position]); } else if (filter.get(position) != 0 && filter.size() == 16){ imageView.setBackgroundResource(blueBallChangeIds[position]); } return imageView; } }三、ShowBallArrayAdapter.java类中的代码：
package com.cn.daming; import java.util.ArrayList; import android.content.Context; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.GridView; import android.widget.ImageView; public class ShowBallArrayAdapter extends BaseAdapter { MainActivity activity; private ArrayList<Integer> filterresult; private Context mContext; ImageView imageView; private int[] imageI; private Integer[] mImageIds = { R.drawable.redball_01, R.drawable.redball_02, R.drawable.redball_03, R.drawable.redball_04, R.drawable.redball_05, R.drawable.redball_06, R.drawable.redball_07, R.drawable.redball_08, R.drawable.redball_09, R.drawable.redball_10, R.drawable.redball_11, R.drawable.redball_12, R.drawable.redball_13, R.drawable.redball_14, R.drawable.redball_15, R.drawable.redball_16, R.drawable.redball_17, R.drawable.redball_18, R.drawable.redball_19, R.drawable.redball_20, R.drawable.redball_21, R.drawable.redball_22, R.drawable.redball_23, R.drawable.redball_24, R.drawable.redball_25, R.drawable.redball_26, R.drawable.redball_27, R.drawable.redball_28, R.drawable.redball_29, R.drawable.redball_30, R.drawable.redball_31, R.drawable.redball_32, R.drawable.redball_33, R.drawable.redball_34,R.drawable.redball_35,}; private Integer[] blueImageIds = { R.drawable.blueball_01, R.drawable.blueball_02, R.drawable.blueball_03, R.drawable.blueball_04, R.drawable.blueball_05, R.drawable.blueball_06, R.drawable.blueball_07, R.drawable.blueball_08, R.drawable.blueball_09, R.drawable.blueball_10, R.drawable.blueball_11, R.drawable.blueball_12, R.drawable.blueball_13, R.drawable.blueball_14, R.drawable.blueball_15, R.drawable.blueball_16, }; StringBuffer sb = new StringBuffer(); String[] temStr; Integer j = 0; String tempS; public ShowBallArrayAdapter(Context c, MainActivity at, ArrayList<Integer> al) { mContext = c; activity = at; filterresult = al; for (int i = 0; i < filterresult.size(); i++) { if (filterresult.get(i) != 0) { sb.append(filterresult.get(i) + ","); } } ; String s = sb.toString(); if (s.length() != 0) { tempS = s.substring(0, s.length() - 1); temStr = tempS.split(","); imageI = new int[temStr.length]; for (int i = 0; i < temStr.length; i++) { j = Integer.parseInt(temStr[i]); imageI[i] = j - 1; } for(int k=0;k<temStr.length;k++){ if (filterresult.size() == 35){ imageI[k] = mImageIds[imageI[k]]; } else if (filterresult.size() == 16){ imageI[k] = blueImageIds[imageI[k]]; } } } else { tempS = s.substring(0, s.length()); } } public int getCount() { if (temStr == null) { return 0; } else { return temStr.length; } } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { if (convertView == null) { imageView = new ImageView(mContext); imageView.setClickable(true); imageView.setLayoutParams(new GridView.LayoutParams(24, 24)); imageView.setScaleType(ImageView.ScaleType.FIT_CENTER); } else { imageView = (ImageView) convertView; } imageView.setBackgroundResource(imageI[position]); return imageView; } }Layout布局中的文件：
一、main.xml布局文件中的代码：
<?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="fill_parent" > <View android:layout_marginLeft="1dip" android:layout_width="2dip" android:layout_height="fill_parent" android:background="#FF909090" /> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <View android:layout_width="fill_parent" android:layout_height="2dip" android:background="#FF909090" /> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal|center_vertical" android:text="@string/hello" android:textSize="10pt" android:textColor="#FF000000" /> <View android:layout_width="fill_parent" android:layout_height="2dip" android:background="#FF909090" /> <Button android:id="@+id/dialog_button" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="点击弹出Dialog对话框" android:textSize="10pt" /> <View android:layout_width="fill_parent" android:layout_height="2dip" android:background="#FF909090" /> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal|center_vertical" android:text="红球选中球数" android:textSize="10pt" android:textColor="#FF000000" /> <GridView android:id="@+id/show_red_gridview" android:layout_width="match_parent" android:layout_height="wrap_content" android:horizontalSpacing="6dip" android:verticalSpacing="16dip" android:numColumns="8" android:gravity="center" /> <View android:layout_width="fill_parent" android:layout_height="2dip" android:background="#FF909090" /> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal|center_vertical" android:text="蓝球选中球数" android:textSize="10pt" android:textColor="#FF000000" /> <GridView android:id="@+id/show_blue_gridview" android:layout_width="match_parent" android:layout_height="wrap_content" android:horizontalSpacing="6dip" android:verticalSpacing="16dip" android:numColumns="8" android:gravity="center" /> <View android:layout_marginBottom="2dip" android:layout_width="fill_parent" android:layout_height="2dip" android:background="#FF909090" /> </LinearLayout> <View android:layout_marginRight="2dip" android:layout_width="2dip" android:layout_height="fill_parent" android:background="#FF909090" /> </LinearLayout>二、ball_grid_dialog.xml布局文件中的代码：
<?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:id="@+id/gridviewtitle" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center_horizontal" android:text="@string/ball_textview" android:textSize="20dip" android:background="#00000000" /> <View android:layout_width="fill_parent" android:layout_height="2dip" android:background="#FF909090" /> <GridView android:id="@+id/red_ball_grid" android:layout_width="match_parent" android:layout_height="wrap_content" android:horizontalSpacing="5dip" android:verticalSpacing="10dip" android:numColumns="7" android:gravity="center" /> <View android:layout_width="fill_parent" android:layout_height="2dip" android:background="#FF909090" /> <GridView android:id="@+id/blue_ball_grid" android:layout_width="match_parent" android:layout_height="wrap_content" android:horizontalSpacing="5dip" android:verticalSpacing="10dip" android:numColumns="7" android:gravity="center" /> <View android:layout_width="fill_parent" android:layout_height="2dip" android:background="#FF909090" /> <RelativeLayout android:layout_width="fill_parent" android:layout_height="wrap_content"> <Button android:id="@+id/Ok_Button" android:text="@string/ok_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true"/> <Button android:id="@+id/Reset_Button" android:text="@string/reset_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_toLeftOf="@id/Ok_Button"> </Button> </RelativeLayout> </LinearLayout>values目录下的string.xml中的代码：
<?xml version="1.0" encoding="utf-8"?> <resources> <string name="hello">大明动态改变GridView的值!</string> <string name="app_name">大明动态GridViewDemo</string> <string name="ball_textview">大明选中球界面</string> <string name="ok_button">确定</string> <string name="reset_button">重置</string> </resources>
AndroidManifest.xml中的代码：