Android 如何在我的gridview中添加复选框？
如何在代码中添加复选框？所以用户在gridview中使用复选框选择多张图片我该怎么做？我只想在gridview中添加一个复选框我该怎么做Android 如何在我的gridview中添加复选框？,android,gridview,Android,Gridview,如何在代码中添加复选框？所以用户在gridview中使用复选框选择多张图片我该怎么做？我只想在gridview中添加一个复选框我该怎么做 GridView gridView; TextView textView; File currentParent; File[] currentFiles; SimpleAdapter simpleAdapter; File root1; File root; root1 = new File("/data/data/com.myexample.lock/
GridView gridView;
TextView textView;
File currentParent;
File[] currentFiles;
SimpleAdapter simpleAdapter;
File root1;
File root;
root1 = new File("/data/data/com.myexample.lock/files/");
currentParent = root1;
currentFiles = root1.listFiles();
currentFilePath = new String[currentFiles.length];
int count = 0;
for (File f : currentFiles) {
currentFilePath[count] = f.getAbsolutePath();
count++;
}
gridView = (GridView) findViewById(R.id.grid);
gridView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent,
View view, int position, long id) {
if (currentFiles[position].isDirectory()) {
root = new File("/data/data/com.myexample.lock/files/" +
FileName(currentFilePath[position]) + "/");
currentFiles = root.listFiles();
inflateListView(currentFiles);
} else if (currentFiles[position].isFile()) {
openFile(currentFiles[position]);
}
}
});
private void inflateListView(File[] files) {
List<Map<String, Object>> listItems = new ArrayList<Map<String, Object>>();
for (int i = 0; i < files.length; i++) {
Map<String, Object> listItem = new HashMap<String, Object>();
if (files[i].isDirectory()) {
listItem.put("icon", R.drawable.folder);
listItem.put("fileName", files[i].getName()+
"("+files[i].list().length+")");
} else {
listItem.put("icon", files[i]);
}
listItems.add(listItem);
}
simpleAdapter = new SimpleAdapter(this,
listItems, R.layout.line,new String[] {
"icon", "fileName" }, new int[] { R.id.icon, R.id.file_name });
}
GridView-GridView；
文本视图文本视图；
当前父文件；
文件[]当前文件；
simpledapter simpledapter；
文件根1；
文件根目录；
root1=新文件（“/data/data/com.myexample.lock/files/”；
currentParent=root1；
currentFiles=root1.listFiles（）；
currentFilePath=新字符串[currentFiles.length]；
整数计数=0；
对于（文件f:currentFiles）{
currentFilePath[count]=f.getAbsolutePath（）；
计数++；
}
gridView=（gridView）findViewById（R.id.grid）；
setOnItemClickListener（新的OnItemClickListener（）{
公共无效MClick（AdapterView父级、，
视图、整型位置、长id）{
如果（currentFiles[position].isDirectory（））{
root=新文件（“/data/data/com.myexample.lock/files/”+
文件名（currentFilePath[position]）+“/”；
currentFiles=root.listFiles（）；
充气列表视图（当前文件）；
}else if（currentFiles[position].isFile（））{
openFile（当前文件[位置]）；
}
}
});
私有void inflateListView（文件[]文件）{
List listItems=new ArrayList（）；
对于（int i=0；i <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff"
android:orientation="horizontal"
android:padding="5dip" >
<ImageView
android:id="@+id/icon"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/file_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/icon"
android:paddingLeft="5dp"
android:textColor="#000000"
android:textSize="12dp" />
</RelativeLayout>
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.content.pm.ActivityInfo;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class DeleteData extends Activity {
Cursor cursor;
ListView lv_delete_data;
static ArrayList<Integer> listOfItemsToDelete;
SQLiteDatabase database;
private Category[] categories;
ArrayList<Category> categoryList;
private ArrayAdapter<Category> listAdapter;
ImageView iv_delete;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_delete_data);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
manage_reload_list();
listOfItemsToDelete = new ArrayList<Integer>();
iv_delete = (ImageView) findViewById(R.id.imageViewDeleteDataDelete);
iv_delete.setClickable(true);
iv_delete.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (listOfItemsToDelete.isEmpty()) {
Toast.makeText(getBaseContext(), "No items selected.",
Toast.LENGTH_SHORT).show();
}
else {
showDialog(
"Warning",
"Are you sure you want to delete these categories ? This will erase all records attached with it.");
}
}
});
lv_delete_data = (ListView) findViewById(R.id.listViewDeleteData);
lv_delete_data.setAdapter(listAdapter);
lv_delete_data.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
ImageView imageView = (ImageView) arg1
.findViewById(R.id.imageViewSingleRowDeleteData);
Category category = (Category) imageView.getTag();
if (category.getChecked() == false) {
imageView.setImageResource(R.drawable.set_check);
listOfItemsToDelete.add(category.getId());
category.setChecked(true);
} else {
imageView.setImageResource(R.drawable.set_basecircle);
listOfItemsToDelete.remove((Integer) category.getId());
category.setChecked(false);
}
}
});
}
private void showDialog(final String title, String message) {
AlertDialog.Builder adb = new Builder(DeleteData.this);
adb.setTitle(title);
adb.setMessage(message);
adb.setIcon(R.drawable.ic_launcher);
String btn = "Ok";
if (title.equals("Warning")) {
btn = "Yes";
adb.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
}
adb.setPositiveButton(btn, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
if (title.equals("Warning")) {
for (int i : listOfItemsToDelete) {
// -------first delete from category table-----
// database.delete("category", "cat_id=?",
// new String[] { i + "" });
// ---------delete from category_fields
database.delete("category_fields", "cat_id=?",
new String[] { i + "" });
// --------now fetch rec_id where cat_id =
// i-----------------
cursor = database.query("records_data",
new String[] { "rec_id" }, "cat_id=?",
new String[] { i + "" }, null, null, null);
if (cursor.getCount() == 0)
cursor.close();
else {
ArrayList<Integer> al_tmp_rec_id = new ArrayList<Integer>();
while (cursor.moveToNext())
al_tmp_rec_id.add(cursor.getInt(0));
cursor.close();
for (int i1 : al_tmp_rec_id) {
database.delete("records_fields_data",
"rec_id=?", new String[] { i1 + "" });
database.delete("record_tag_relation",
"rec_id=?", new String[] { i1 + "" });
}
// ---------delete from records_data-------
database.delete("records_data", "cat_id=?",
new String[] { i + "" });
cursor.close();
}
}
showDialog("Success",
"Categories, with their records, deleted successfully.");
} else {
database.close();
listOfItemsToDelete.clear();
manage_reload_list();
lv_delete_data.setAdapter(listAdapter);
}
}
});
AlertDialog ad = adb.create();
ad.show();
}
protected void manage_reload_list() {
loadDatabase();
categoryList = new ArrayList<Category>();
// ------first fetch all categories name list-------
cursor = database.query("category", new String[] { "cat_id",
"cat_description" }, null, null, null, null, null);
if (cursor.getCount() == 0) {
Toast.makeText(getBaseContext(), "No categories found.",
Toast.LENGTH_SHORT).show();
cursor.close();
} else {
while (cursor.moveToNext()) {
categories = new Category[] { new Category(cursor.getInt(0),
cursor.getString(1)) };
categoryList.addAll(Arrays.asList(categories));
}
cursor.close();
}
listAdapter = new CategoryArrayAdapter(this, categoryList);
}
static class Category {
String cat_name = "";
int cat_id = 0;
Boolean checked = false;
Category(int cat_id, String name) {
this.cat_name = name;
this.cat_id = cat_id;
}
public int getId() {
return cat_id;
}
public String getCatName() {
return cat_name;
}
public Boolean getChecked() {
return checked;
}
public void setChecked(Boolean checked) {
this.checked = checked;
}
public boolean isChecked() {
return checked;
}
public void toggleChecked() {
checked = !checked;
}
}
static class CategoryViewHolder {
ImageView imageViewCheck;
TextView textViewCategoryName;
public CategoryViewHolder(ImageView iv_check, TextView tv_category_name) {
imageViewCheck = iv_check;
textViewCategoryName = tv_category_name;
}
public ImageView getImageViewCheck() {
return imageViewCheck;
}
public TextView getTextViewCategoryName() {
return textViewCategoryName;
}
}
static class CategoryArrayAdapter extends ArrayAdapter<Category> {
LayoutInflater inflater;
public CategoryArrayAdapter(Context context, List<Category> categoryList) {
super(context, R.layout.single_row_delete_data,
R.id.textViewSingleRowDeleteData, categoryList);
inflater = LayoutInflater.from(context);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Category category = (Category) this.getItem(position);
final ImageView imageViewCheck;
final TextView textViewCN;
if (convertView == null) {
convertView = inflater.inflate(R.layout.single_row_delete_data,
null);
imageViewCheck = (ImageView) convertView
.findViewById(R.id.imageViewSingleRowDeleteData);
textViewCN = (TextView) convertView
.findViewById(R.id.textViewSingleRowDeleteData);
convertView.setTag(new CategoryViewHolder(imageViewCheck,
textViewCN));
}
else {
CategoryViewHolder viewHolder = (CategoryViewHolder) convertView
.getTag();
imageViewCheck = viewHolder.getImageViewCheck();
textViewCN = viewHolder.getTextViewCategoryName();
}
imageViewCheck.setFocusable(false);
imageViewCheck.setFocusableInTouchMode(false);
imageViewCheck.setClickable(true);
imageViewCheck.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
ImageView iv = (ImageView) v;
Category category = (Category) iv.getTag();
if (category.getChecked() == false) {
imageViewCheck.setImageResource(R.drawable.set_check);
listOfItemsToDelete.add(category.getId());
category.setChecked(true);
} else {
imageViewCheck
.setImageResource(R.drawable.set_basecircle);
listOfItemsToDelete.remove((Integer) category.getId());
category.setChecked(false);
}
}
});
imageViewCheck.setTag(category);
if (category.getChecked() == true)
imageViewCheck.setImageResource(R.drawable.set_check);
else
imageViewCheck.setImageResource(R.drawable.set_basecircle);
textViewCN.setText(category.getCatName());
return convertView;
}
}
private void loadDatabase() {
database = openOrCreateDatabase("WalletAppDatabase.db",
SQLiteDatabase.OPEN_READWRITE, null);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
finish();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
import java.util.ArrayList；
导入java.util.array；
导入java.util.List；
导入android.app.Activity；
导入android.app.AlertDialog；
导入android.app.AlertDialog.Builder；
导入android.content.Context；
导入android.content.DialogInterface；
导入android.content.pm.ActivityInfo；
导入android.database.Cursor；
导入android.database.sqlite.SQLiteDatabase；
导入android.os.Bundle；
导入android.view.KeyEvent；
导入android.view.LayoutInflater；
导入android.view.view；
导入android.view.view.OnClickListener；
导入android.view.ViewGroup；
导入android.widget.AdapterView；
导入android.widget.AdapterView.OnItemClickListener；
导入android.widget.ArrayAdapter；
导入android.widget.ImageView；
导入android.widget.ListView；
导入android.widget.TextView；
导入android.widget.Toast；
公共类DeleteData扩展活动{
光标；
ListView lv_删除_数据；
静态ArrayList listOfItemsToDelete；
SQLITE数据库；
私有类别[]类别；
ArrayList类别列表；
专用阵列适配器列表适配器；
ImageView iv_删除；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\u delete\u数据）；
此.setRequestedOrientation（ActivityInfo.SCREEN\u ORIENTATION\u Graphic）；
管理重新加载列表（）；
listOfItemsToDelete=newarraylist（）；
iv_delete=（ImageView）findViewById（R.id.imageViewDeleteDataDelete）；
iv_删除。可点击设置（真）；
iv_delete.setOnClickListener（新的OnClickListener（）{
@凌驾
公共void onClick（视图v）{
if（listOfItemsToDelete.isEmpty（））{
Toast.makeText（getBaseContext（），“未选择任何项。”，
吐司。长度（短）。show（）；
}
否则{
显示对话框(
“警告”，
“确实要删除这些类别吗？这将删除所有附加的记录。”）；
}
}
});
lv_delete_data=（ListView）findViewById（R.id.listViewDeleteData）；
lv_delete_data.setAdapter（listAdapter）；
lv_delete_data.setOnItemClickListener（新的OnItemClickListener（）{
@凌驾
公共链接（AdapterView arg0、视图arg1、内部arg2、，
长arg3）{
//TODO自动生成的方法存根
ImageView图像视图=（图像视图）arg1
.findViewById（R.id.imageViewSingleRowDeleteData）；
Category Category=（Category）imageView.getTag（）；
if（category.getChecked（）==false）{
imageView.setImageResource（R.drawable.set_check）；
listOfItemsToDelete.add（category.getId（））；
类别。setChecked（真）；
}否则{
imageView.setImageResource（R.drawable.set_基圆）；
删除（（整数）category.getId（））；
类别。setChecked（假）；
}
}
});
}
私有void showDialog（最终字符串标题、字符串消息）{
AlertDialog.Builder adb=新生成器（DeleteData.this）；
adb.setTitle（标题）；
adb.setMessage（消息）；
adb.setIcon（R.drawable.ic_启动器）；
字符串btn=“确定”；
如果（标题等于（“警告”））{
btn=“是”；
adb.setNegativeButton（“否”，新的DialogInterface.OnClickListener（）{
public void onClick（DialogInterface dialog，int which）{
dialog.dismise（）；
}
});
<RelativeLayout 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="#ffffff"
tools:context=".DeleteData" >
<RelativeLayout
android:id="@+id/relativeLayoutDeleteDataTopBar"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" >
<TextView
android:id="@+id/textViewDeleteDataScreenTitle"
style="@style/screen_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Delete Data" />
<ImageView
android:id="@+id/imageViewDeleteDataDelete"
android:layout_width="22dp"
android:layout_height="22dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="10dp"
android:src="@drawable/set_delete" />
</RelativeLayout>
<View
android:id="@+id/viewDeleteData"
android:layout_width="match_parent"
android:layout_height="5dp"
android:layout_below="@+id/relativeLayoutDeleteDataTopBar"
android:background="@drawable/shadow" />
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
android:id="@+id/linearLayoutDeleteDataAdMobBanner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:orientation="vertical" >
<com.google.ads.AdView
android:id="@+id/adViewDeleteData"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
ads:adSize="BANNER"
ads:adUnitId="a1512f50d8c3692"
ads:loadAdOnCreate="true"
ads:testDevices="TEST_EMULATOR, TEST_DEVICE_ID" />
</LinearLayout>
<ListView
android:id="@+id/listViewDeleteData"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="#BDBDBD"
android:dividerHeight="1dp"
android:layout_below="@+id/viewDeleteData"
android:layout_above="@+id/linearLayoutDeleteDataAdMobBanner" >
</ListView>
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ffffff"
android:padding="15dp" >
<TextView
android:id="@+id/textViewSingleRowDeleteData"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
style="@style/listview_only_textview"
android:text="Category" />
<ImageView
android:id="@+id/imageViewSingleRowDeleteData"
android:layout_width="22dp"
android:layout_height="22dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:src="@drawable/set_basecircle" />
</RelativeLayout>