Universal Image Loader With GridView For Android.
—> AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.universalimageloaderdemo" android:versionCode="1" android:versionName="1.0" > <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="22" /> <application android:name=".UILApplication" android:allowBackup="false" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name=".MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
–> In Values Folder
styles.xml
<resources> <!-- Base application theme, dependent on API level. This theme is replaced by AppBaseTheme from res/values-vXX/styles.xml on newer devices. --> <style name="AppBaseTheme" parent="Theme.AppCompat.Light"> <!-- Theme customizations available in newer API levels can go in res/values-vXX/styles.xml, while customizations related to backward-compatibility can go here. --> </style> <!-- Application theme. --> <style name="AppTheme" parent="AppBaseTheme"> <!-- All customizations that are NOT specific to a particular API-level can go here. --> </style> <style name="ProgressBarStyle" parent="@android:style/Widget.ProgressBar.Horizontal"/> </resources>
IN Layout Folder
activity_main.xml
<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" > <GridView android:id="@+id/grid" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:horizontalSpacing="4dip" android:numColumns="3" android:stretchMode="columnWidth" android:verticalSpacing="4dip" android:padding="4dip" /> </RelativeLayout>
item_grid_image.xml
<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="120dip" > <ImageView android:id="@+id/image" android:layout_width="match_parent" android:layout_height="120dip" android:adjustViewBounds="true" android:scaleType="centerCrop" /> <ProgressBar android:id="@+id/progress" style="@style/ProgressBarStyle" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="bottom" android:indeterminate="false" android:max="100" /> </FrameLayout>
IN drawable Folder Put Image.
Constants.java
package com.example.universalimageloaderdemo; public final class Constants { public static final String[] IMAGES = new String[] { // Heavy images "http://mobworld.co.in/BestWallpaper/3D/image1.jpg", "http://mobworld.co.in/BestWallpaper/3D/image2.jpg", "http://mobworld.co.in/BestWallpaper/3D/image3.jpg", "http://mobworld.co.in/BestWallpaper/3D/image4.jpg", "http://mobworld.co.in/BestWallpaper/3D/image5.jpg", "http://mobworld.co.in/BestWallpaper/3D/image6.jpg", "http://mobworld.co.in/BestWallpaper/3D/image7.jpg", "http://mobworld.co.in/BestWallpaper/3D/image8.jpg", "http://mobworld.co.in/BestWallpaper/3D/image9.jpg", "http://mobworld.co.in/BestWallpaper/3D/image10.jpg", }; private Constants() { } public static class Config { public static final boolean DEVELOPER_MODE = false; } public static class Extra { public static final String FRAGMENT_INDEX = "com.nostra13.example.universalimageloader.FRAGMENT_INDEX"; public static final String IMAGE_POSITION = "com.nostra13.example.universalimageloader.IMAGE_POSITION"; } }
MainActivity.java
package com.example.universalimageloaderdemo; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import android.app.Activity; import android.content.Context; import android.graphics.Bitmap; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.GridView; import android.widget.ImageView; import android.widget.ProgressBar; import com.nostra13.universalimageloader.core.DisplayImageOptions; import com.nostra13.universalimageloader.core.ImageLoader; import com.nostra13.universalimageloader.core.assist.FailReason; import com.nostra13.universalimageloader.core.listener.ImageLoadingProgressListener; import com.nostra13.universalimageloader.core.listener.SimpleImageLoadingListener; import com.nostra13.universalimageloader.utils.L; public class MainActivity extends Activity { private static final String TEST_FILE_NAME = "Universal Image Loader @#&=+-_.,!()~'%20.png"; public static final int INDEX = 1; GridView grid; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); File testImageOnSdCard = new File("/mnt/sdcard", TEST_FILE_NAME); if (!testImageOnSdCard.exists()) { copyTestImageToSdCard(testImageOnSdCard); } grid = (GridView)findViewById(R.id.grid); grid.setAdapter(new ImageAdapter(this)); } private void copyTestImageToSdCard(final File testImageOnSdCard) { new Thread(new Runnable() { @Override public void run() { try { InputStream is = getAssets().open(TEST_FILE_NAME); FileOutputStream fos = new FileOutputStream(testImageOnSdCard); byte[] buffer = new byte[8192]; int read; try { while ((read = is.read(buffer)) != -1) { fos.write(buffer, 0, read); } } finally { fos.flush(); fos.close(); is.close(); } } catch (IOException e) { L.w("Can't copy test image onto SD card"); } } }).start(); } private static class ImageAdapter extends BaseAdapter { private static final String[] IMAGE_URLS = Constants.IMAGES; private LayoutInflater inflater; private DisplayImageOptions options; ImageAdapter(Context context) { inflater = LayoutInflater.from(context); options = new DisplayImageOptions.Builder() .showImageOnLoading(R.drawable.ic_stub) .showImageForEmptyUri(R.drawable.ic_empty) .showImageOnFail(R.drawable.ic_error) .cacheInMemory(true) .cacheOnDisk(true) .considerExifParams(true) .bitmapConfig(Bitmap.Config.RGB_565) .build(); } @Override public int getCount() { return IMAGE_URLS.length; } @Override public Object getItem(int position) { return null; } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { final ViewHolder holder; View view = convertView; if (view == null) { view = inflater.inflate(R.layout.item_grid_image, parent, false); holder = new ViewHolder(); assert view != null; holder.imageView = (ImageView) view.findViewById(R.id.image); holder.progressBar = (ProgressBar) view.findViewById(R.id.progress); view.setTag(holder); } else { holder = (ViewHolder) view.getTag(); } ImageLoader.getInstance() .displayImage(IMAGE_URLS[position], holder.imageView, options, new SimpleImageLoadingListener() { @Override public void onLoadingStarted(String imageUri, View view) { holder.progressBar.setProgress(0); holder.progressBar.setVisibility(View.VISIBLE); } @Override public void onLoadingFailed(String imageUri, View view, FailReason failReason) { holder.progressBar.setVisibility(View.GONE); } @Override public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) { holder.progressBar.setVisibility(View.GONE); } }, new ImageLoadingProgressListener() { @Override public void onProgressUpdate(String imageUri, View view, int current, int total) { holder.progressBar.setProgress(Math.round(100.0f * current / total)); } }); return view; } } static class ViewHolder { ImageView imageView; ProgressBar progressBar; } }
UILApplication.java
package com.example.universalimageloaderdemo; import android.annotation.TargetApi; import android.app.Application; import android.content.Context; import android.os.Build; import android.os.StrictMode; import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator; import com.nostra13.universalimageloader.core.ImageLoader; import com.nostra13.universalimageloader.core.ImageLoaderConfiguration; import com.nostra13.universalimageloader.core.assist.QueueProcessingType; public class UILApplication extends Application { @TargetApi(Build.VERSION_CODES.GINGERBREAD) @SuppressWarnings("unused") @Override public void onCreate() { if (Constants.Config.DEVELOPER_MODE && Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) { StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder().detectAll().penaltyDialog().build()); StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder().detectAll().penaltyDeath().build()); } super.onCreate(); initImageLoader(getApplicationContext()); } public static void initImageLoader(Context context) { // This configuration tuning is custom. You can tune every option, you may tune some of them, // or you can create default configuration by // ImageLoaderConfiguration.createDefault(this); // method. ImageLoaderConfiguration.Builder config = new ImageLoaderConfiguration.Builder(context); config.threadPriority(Thread.NORM_PRIORITY - 2); config.denyCacheImageMultipleSizesInMemory(); config.diskCacheFileNameGenerator(new Md5FileNameGenerator()); config.diskCacheSize(50 * 1024 * 1024); // 50 MiB config.tasksProcessingOrder(QueueProcessingType.LIFO); config.writeDebugLogs(); // Remove for release app // Initialize ImageLoader with configuration. ImageLoader.getInstance().init(config.build()); } }
Leave a Reply