Example code of android GridView multi-Choice

The Code is as follows:

Main. xml

Copy codeThe Code is as follows: <LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android"

Xmlns: tools = "http://schemas.android.com/tools"

Android: background = "#000000"

Android: layout_width = "fill_parent"

Android: layout_height = "fill_parent"

Tools: context = ". MainActivity">

<GridView

Android: layout_width = "fill_parent"

Android: layout_height = "fill_parent"

Android: id = "@ + id/grid"

Android: verticalSpacing = "3dp"

Android: horizontalSpacing = "3dp"

Android: numColumns = "3"

> </GridView>

</LinearLayout>

Item. xml

Copy codeThe Code is as follows: <? Xml version = "1.0" encoding = "UTF-8"?>

<LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android"

Android: layout_width = "match_parent"

Android: layout_height = "match_parent"

Android: orientation = "vertical">

<ImageView

Android: scaleType = "fitXY"

Android: padding = "3dp"

Android: layout_height = "70dp"

Android: layout_width = "70dp"

Android: id = "@ + id/image_item"

/>

</LinearLayout>

MainActivity. javaCopy codeThe Code is as follows: package com. imageview;
Import android. OS. Bundle;
Import android. app. Activity;
Import android. view. View;
Import android. widget. AdapterView;
Import android. widget. GridView;
Import android. widget. AdapterView. OnItemClickListener;

Public class MainActivity extends Activity {
Private Adpter adpter;
Private GridView;
@ Override
Protected void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. main );
Int [] image = {R. drawable. dog1, R. drawable. m2, R. drawable. m3, R. drawable. m4, R. drawable. m5, R. drawable. dog2 };
Adpter = new Adpter (image, this );
GridView = (GridView) findViewById (R. id. grid );
GridView. setAdapter (adpter );
GridView. setOnItemClickListener (new OnItemClickListener (){
@ Override
Public void onItemClick (AdapterView <?> Arg0, View arg1,
Int position, long arg3 ){
Adpter. chiceState (position );
}
});
}
}

Adpter. java

Copy codeThe Code is as follows: package com. imageview;

Import android. content. Context;
Import android. graphics. Bitmap;
Import android. graphics. BitmapFactory;
Import android. graphics. drawable. BitmapDrawable;
Import android. graphics. drawable. Drawable;
Import android. graphics. drawable. LayerDrawable;
Import android. util. Log;
Import android. view. LayoutInflater;
Import android. view. View;
Import android. view. ViewGroup;
Import android. widget. BaseAdapter;
Import android. widget. ImageView;

Public class Adpter extends BaseAdapter {
Private int [] image;
Private boolean isChice [];
Private Context context;

Public Adpter (int [] im, Context context ){
This. image = im;
Log. I ("hck", im. length + "lenght ");
IsChice = new boolean [im. length];
For (int I = 0; I <im. length; I ++ ){
IsChice [I] = false;
}
This. context = context;
}

@ Override
Public int getCount (){
Return image. length;
}

@ Override
Public Object getItem (int arg0 ){
Return image [arg0];
}

@ Override
Public long getItemId (int arg0 ){
Return arg0;
}

@ Override
Public View getView (int arg0, View arg1, ViewGroup arg2 ){
View view = arg1;
GetView getView = null;
If (view = null ){
View = LayoutInflater. from (context). inflate (R. layout. item, null );
GetView = new GetView ();
GetView. imageView = (ImageView) view. findViewById (R. id. image_item );
View. setTag (getView );
} Else {
GetView = (GetView) view. getTag ();
}
GetView. imageView. setImageDrawable (getView (arg0 ));

Return view;
}

Static class GetView {
ImageView imageView;
}

// The following code is used.
Private LayerDrawable getView (int post ){

Bitmap bitmap = (BitmapDrawable) context. getResources (). getDrawable (image [post]). getBitmap ();
Bitmap bitmap2 = null;
LayerDrawable la = null;
If (isChice [post] = true ){
Bitmap2 = BitmapFactory. decodeResource (context. getResources (),
R. drawable. editable_mode_checked_tag );
}
If (bitmap2! = Null ){
Drawable [] array = new Drawable [2];
Array [0] = new BitmapDrawable (bitmap );
Array [1] = new BitmapDrawable (bitmap2 );
La = new LayerDrawable (array );
La. setLayerInset (0, 0, 0, 0, 0); // The distance between the edges of the first graph.
La. setLayerInset (1, 0, 65, 65, 0 );
}
Else {
Drawable [] array = new Drawable [1];
Array [0] = new BitmapDrawable (bitmap );
La = new LayerDrawable (array );
La. setLayerInset (0, 0, 0, 0, 0 );
}
Return la; // return the superimposed graph.
}
Public void chiceState (int post)
{
IsChice [post] = isChice [post] = true? False: true;
This. notifyDataSetChanged ();
}
}