Android album Effects

Android album Effects

This article mainly introduces the Android album effect (implemented using C # and Java respectively). The original C # can also be used to develop apps ~ It feels good, because xiaobian does not like Java for the time being, so if you need it, you can refer

Running Effect

C # implementation

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69 using Android. App;

Using Android. OS;

Using Android. Widget;

Namespace ImageDemo

{

[Activity (Label = "@ string/ApplicationName", MainLauncher = true, Icon = "@ drawable/icon")]

Public class MainActivity: Activity

{

Private Gallery _ gallery;

Private ImageView _ selectedImg;

Private readonly int [] _ imageIds = {

Resource. Drawable. test1,

Resource. Drawable. test2,

Resource. Drawable. test3,

Resource. Drawable. test4,

Resource. Drawable. test5,

Resource. Drawable. test6,

Resource. Drawable. test7,

Resource. Drawable. test8

};

Protected override void OnCreate (Bundle bundle)

{

Base. OnCreate (bundle );

SetContentView (Resource. Layout. Main );

_ Gallery = FindViewById (Resource. Id. gallery );

_ SelectedImg = FindViewById (Resource. Id. currentImg );

_ Gallery. Adapter = new ImageAdapter (this, _ imageIds );

_ Gallery. ItemSelected + = Gallery_ItemSelected;

}

Private void Gallery_ItemSelected (object sender, AdapterView. ItemSelectedEventArgs e)

{

_ SelectedImg. SetImageResource (_ imageIds [e. Position]);

}

}

Public class ImageAdapter: BaseAdapter

{

Private readonly Context _ context;

Private readonly int [] _ imageIds;

Public ImageAdapter (Context context, int [] imageIds)

{

_ Context = context;

_ ImageIds = imageIds;

}

Public override Object GetItem (int position)

{

Return null;

}

Public override long GetItemId (int position)

{

Return 0;

}

Public override int Count

{

Get {return _ imageIds. Length ;}

}

Public override View GetView (int position, View convertView, ViewGroup parent)

{

Var image = new ImageView (_ context );

Image. SetImageResource (_ imageIds [position]);

Image. LayoutParameters = new Gallery. LayoutParams (150,100 );

Image. SetScaleType (ImageView. ScaleType. FitXy );

Return image;

}

}

}

Java Implementation

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85 package com. example. halower. gallerydemo;

Import android. content. Context;

Import android. OS. Bundle;

Import android. support. v7.app. ActionBarActivity;

Import android. view. View;

Import android. view. ViewGroup;

Import android. widget. AdapterView;

Import android. widget. BaseAdapter;

Import android. widget. Gallery;

Import android. widget. ImageView;

Import static android. widget. Gallery. LayoutParams;

Public class MainActivity extends ActionBarActivity {

Private int [] imageIds = {

R. drawable. test1,

R. drawable. test2,

R. drawable. test3,

R. drawable. test4,

R. drawable. test5,

R. drawable. test6,

R. drawable. test7,

R. drawable. test8

};

Gallery gallery;

ImageView currentView;

@ Override

Protected void onCreate (Bundle savedInstanceState ){

Super. onCreate (savedInstanceState );

SetContentView (R. layout. activity_main );

Gallery = (Gallery) findViewById (R. id. gallery );

ImageAdapter adapter = new ImageAdapter (this, imageIds );

CurrentView = (ImageView) findViewById (R. id. currentImg );

Gallery. setAdapter (adapter );

Gallery. setOnItemSelectedListener (new AdapterView. OnItemSelectedListener (){

@ Override

Public void onItemSelected (AdapterView parent, View view, int position, long id ){

CurrentView. setImageResource (imageIds [position]);

}

@ Override

Public void onNothingSelected (AdapterView parent ){

}

});

}

}

Class ImageAdapter extends BaseAdapter

{

Context _ context;

Int [] imageIds;

Public ImageAdapter (Context context, int [] imageIds ){

_ Context = context;

This. imageIds = imageIds;

}

@ Override

Public int getCount (){

Return imageIds. length;

}

@ Override

Public Object getItem (int position ){

Return null;

}

@ Override

Public long getItemId (int position ){

Return 0;

}

@ Override

Public View getView (int position, View convertView, ViewGroup parent ){

ImageView imageView = new ImageView (_ context );

ImageView. setImageResource (imageIds [position]);

ImageView. setScaleType (ImageView. ScaleType. FIT_XY );

ImageView. setLayoutParams (new LayoutParams (70,100 ));

Return imageView;

}

}

Layout

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

Android: layout_height = "match_parent" android: paddingLeft = "@ dimen/activity_horizontal_margin"

Android: paddingRight = "@ dimen/activity_horizontal_margin"

Android: paddingTop = "@ dimen/activity_vertical_margin"

Android: paddingBottom = "@ dimen/activity_vertical_margin" tools: context = ". MainActivity">

　　

Android: layout_width = "320dp"

Android: layout_height = "320dp"

Android: id = "@ + id/currentImg"

Android: layout_centerHorizontal = "true"/>

　　

Android: layout_width = "match_parent"

Android: layout_height = "wrap_content"

Android: unselectedAlpha = "0.6"

Android: spacing = "2pt"

Android: layout_below = "@ + id/currentImg"

Android: id = "@ + id/gallery"/>