Android & lt; GridView grid view from scratch. Twenty-eight. & gt;, androidgridview

Learn android <GridView grid view. Twenty-eight ..> from scratch, androidgridview
The GridView component displays all components in a grid. For example, when creating an album, all the images are displayed in different grids of the same size, the inheritance structure of this component is as follows: java. lang. object upload android. view. view every android. view. viewGroup uses android. widget. adapterView <T extends android. widget. adapter> logging android. widget. absListView uses android. widget. common Methods of GridView

1	Public GridView (Context context)	Structure		Create a GridView object
2	Public void setStretchMode (int stretchMode)	Normal	Android: stretchMode	Scaling Mode
3	Public void setVerticalSpacing (int verticalSpacing)	Normal	Android: verticalSpacing	Set Vertical spacing
4	Public void setHorizontalSpacing (int horizontalSpacing)	Normal	Android: horizontalSpacing	Set Horizontal spacing
5	Public void setNumColumns (int numColumns)	Normal	Android: numColumns	Sets the data volume displayed in each column. If it is set to auto_fit, it is automatically set.
6	Public void setSelection (int position)	Normal		Set the selected items by default
7	Public void setGravity (int gravity)	Normal	Android: gravity	Sets the alignment mode, which is specified by the Gravity class.
8	Public void setAdapter (ListAdapter adapter)	Normal		Set the display image set

Of course, to use the GridView, you must use the Adapter dataset class to configure image data.
You can use SimpleAdapter and BaseAdapter to configure the adapter. Today, I use BaseAdapter to configure the Adapter data.
XML file

<span style="font-size:18px;"><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:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <GridView        android:id="@+id/gridview"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:stretchMode="columnWidth"        android:numColumns="4"         /></RelativeLayout></span>

JAVA files

<Span style = "font-size: 18px;"> package com. example. gridview; import android. app. activity; import android. app. alertDialog; import android. content. dialogInterface; import android. content. dialogInterface. onClickListener; import android. OS. bundle; import android. view. view; import android. view. viewGroup; import android. view. viewGroup. layoutParams; import android. widget. adapterView; import android. widget. adapterVie W. onItemClickListener; import android. widget. baseAdapter; import android. widget. gridView; import android. widget. imageView; public class MainActivity extends Activity {private GridView gridView; // initialize GridViewprivate int images [] = {R. drawable. a1, R. drawable. a2, R. drawable. a3, R. drawable. a4, R. drawable. a5, R. drawable. a6, R. drawable. a7, R. drawable. a8, R. drawable. a9, R. drawable. a10, R. drawable. a11, R. drawab Le. a12, R. drawable. a13, R. drawable. a14, R. drawable. a15, R. drawable. a16}; // image data @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); // obtain the GridView object gridView = (GridView) this. findViewById (R. id. gridview); // set AdptergridView. setAdapter (new MyAdapter (); // sets the listener event gridView. setOnItemClickListener (new OnItemClickListener (){ @ Overridepublic void onItemClick (AdapterView <?> AdapterView, View view, int position, long id) {// TODO Auto-generated method stub // set the view space ImageView image = new ImageView (MainActivity. this); // sets the image information. setImageResource (images [position]); // you can specify the image size alignment mode. setScaleType (ImageView. scaleType. CENTER); // set the image size. setLayoutParams (new LayoutParams (LayoutParams. WRAP_CONTENT, LayoutParams. WRAP_CONTENT); // create dialog box AlertDialog. builder builder = new AlertDialog. builder (MainActivity. this ). setTitle ("view image "). setView (image ). setIcon (android. r. drawable. btn_star_big_on ). setNegativeButton ("off", new OnClickListener () {@ Overridepublic void onClick (DialogInterface arg0, int arg1) {// TODO Auto-generated method stub }}); // create a dialog box builder. create (); // display the dialog box builder. show () ;}});} class MyAdapter extends BaseAdapter {@ Overridepublic int getCount () {// TODO Auto-generated method stubreturn images. length ;}@ Overridepublic Object getItem (int position) {// TODO Auto-generated method stubreturn position ;}@ Overridepublic long getItemId (int position) {// TODO Auto-generated method stubreturn position;} @ Overridepublic View getView (int position, View myView, ViewGroup parent) {// TODO Auto-generated method stub // return imageView object ImageView imageView = new ImageView (MainActivity. this); imageView. setImageResource (images [position]); imageView. setScaleType (ImageView. scaleType. CENTER); return imageView ;}}</span>

Effect
You can use the GridView component to achieve a colorful menu effect.

Next prediction: TabHost tag component


Android uses the GridView mesh view (such as the nine cells). Can the custom view be used to fill the view?
Android GridView grid layout. You can add or delete a grid,

Mainly data records. You can re-load the gridview data once in the trigger event returned by adding the data to implement the Add function.

Other operations, such as clicking a button to enter the second-level page, and sliding left and right to display hidden content, are all operations triggered by page layout and layout.