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      1 package js.kbars;
      2 
      3 import android.app.Activity;
      4 import android.content.Intent;
      5 import android.graphics.Bitmap;
      6 import android.graphics.Bitmap.CompressFormat;
      7 import android.graphics.BitmapFactory;
      8 import android.graphics.drawable.BitmapDrawable;
      9 import android.net.Uri;
     10 import android.util.Log;
     11 import android.view.Menu;
     12 import android.view.MenuItem;
     13 import android.view.MenuItem.OnMenuItemClickListener;
     14 import android.view.View;
     15 import java.io.File;
     16 import java.io.FileNotFoundException;
     17 import java.io.FileOutputStream;
     18 import java.io.IOException;
     19 
     20 public final class ImageBackgroundMenuItem implements OnMenuItemClickListener {
     21     public static final int REQUEST_CODE = 234;
     22     private static final String TAG = ImageBackgroundMenuItem.class.getSimpleName();
     23     private final Activity mActivity;
     24     private final View mTarget;
     25 
     26     public ImageBackgroundMenuItem(Menu menu, Activity activity, View target) {
     27         this.mActivity = activity;
     28         this.mTarget = target;
     29         menu.add("Select image background...").setOnMenuItemClickListener(this);
     30         loadBitmap();
     31     }
     32 
     33     public boolean onMenuItemClick(MenuItem item) {
     34         chooseBackground();
     35         return true;
     36     }
     37 
     38     public void onActivityResult(int resultCode, Intent data) {
     39         if (resultCode == -1) {
     40             Uri image = data.getData();
     41             try {
     42                 Bitmap bitmap = BitmapFactory.decodeStream(this.mActivity.getContentResolver().openInputStream(image));
     43                 if (bitmap != null) {
     44                     setTargetBackground(bitmap);
     45                     saveBitmap(bitmap);
     46                 }
     47             } catch (FileNotFoundException e) {
     48                 Log.w(TAG, "Error getting image " + image, e);
     49             }
     50         }
     51     }
     52 
     53     private void chooseBackground() {
     54         Intent photoPickerIntent = new Intent("android.intent.action.PICK");
     55         photoPickerIntent.setType("image/*");
     56         this.mActivity.startActivityForResult(photoPickerIntent, REQUEST_CODE);
     57     }
     58 
     59     private File bitmapFile() {
     60         return new File(this.mActivity.getCacheDir(), "background.png");
     61     }
     62 
     63     private void saveBitmap(Bitmap bitmap) {
     64         FileNotFoundException e;
     65         Throwable th;
     66         File f = bitmapFile();
     67         if (f.exists()) {
     68             f.delete();
     69         }
     70         if (bitmap != null) {
     71             try {
     72                 FileOutputStream out = new FileOutputStream(f);
     73                 bitmap.compress(CompressFormat.PNG, 100, out);
     74                 out.close();
     75             } catch (IOException e1) {
     76                 e1.printStackTrace();
     77             }
     78         }
     79     }
     80 
     81     private void loadBitmap() {
     82         Bitmap bitmap = loadBitmapFromCache();
     83         if (bitmap == null) {
     84             bitmap = loadBitmapFromAssets();
     85         }
     86         setTargetBackground(bitmap);
     87     }
     88 
     89     private Bitmap loadBitmapFromCache() {
     90         File f = bitmapFile();
     91         return f.exists() ? BitmapFactory.decodeFile(f.getAbsolutePath()) : null;
     92     }
     93 
     94     private Bitmap loadBitmapFromAssets() {
     95         try {
     96             return BitmapFactory.decodeStream(this.mActivity.getAssets().open("background.png"));
     97         } catch (IOException e) {
     98             throw new RuntimeException(e);
     99         }
    100     }
    101 
    102     private void setTargetBackground(Bitmap bitmap) {
    103         if (bitmap == null) {
    104             this.mTarget.setBackground(null);
    105         } else {
    106             this.mTarget.setBackground(new BitmapDrawable(this.mActivity.getResources(), bitmap));
    107         }
    108     }
    109 }
    110