Android Open Source - my-wallpaper Crop Wallpaper Task

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License

The source code is released under:
MIT License
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Java Source Code

package com.koonen.photostream;
// w ww .j  av a  2 s .  c  om
import java.io.File;

import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.util.Log;

import com.koonen.photostream.api.Photo;
import com.koonen.photostream.api.PhotoSize;
import com.koonen.photostream.api.ServiceManager;
import com.koonen.photostream.settings.UserPreferences;
import com.koonen.photostream.settings.WallpaperSettingMode;
import com.koonen.utils.StreamUtils;

/**
 * Background task to crop a large version of the image. The cropped result will
 * be set as a wallpaper. The tasks starts by showing the progress bar, then
 * downloads the large version of the photo into a temporary file and ends by
 * sending an intent to the Camera application to crop the image.
 */
public class CropWallpaperTask extends UserTask<Photo, Void, Boolean> {

  public interface CropWallpaperExecutor {
    public void onPreExecute();

    public void onPostExecuteSuccess(final Intent intent);

    public void onPostExecuteError();

    public void onPostExecuteFinish();
  }

  private static final String TAG = "CropWallpaperTask";

  public static final String WALLPAPER_FILE_NAME = "wallpaper";

  public static final int REQUEST_CROP_IMAGE = 42;

  // limit bu width or by height. in px
  private static final int LIMIT_SIZE_IMAGE = 150;

  private File mFile;
  private Context context;
  private CropWallpaperExecutor cropWallpaperExecutor;

  CropWallpaperTask(Context context,
      CropWallpaperExecutor cropWallpaperExecutor) {
    super();
    this.context = context;
    this.cropWallpaperExecutor = cropWallpaperExecutor;
  }

  @Override
  public void onPreExecute() {
    mFile = context.getFileStreamPath(WALLPAPER_FILE_NAME);
    cropWallpaperExecutor.onPreExecute();
  }

  public Boolean doInBackground(Photo... params) {
    boolean success = false;
    try {
      Bitmap bitmap = ServiceManager.get().getService().loadPhotoBitmap(
          params[0], PhotoSize.MEDIUM);
      if (bitmap != null) {
        Bitmap scaledBitmap = bitmap;
        int bitmapWidth = bitmap.getWidth();
        int bitmapHeight = bitmap.getHeight();

        UserPreferences preferences = new UserPreferences(context);
        String wallpaerSettingMode = preferences
            .getWallpaperSettingMode();

        if (WallpaperSettingMode.STRETCH_MODE.getName().equals(
            wallpaerSettingMode)
            || (WallpaperSettingMode.AUTO_MODE.getName().equals(
                wallpaerSettingMode)
                && bitmapWidth > LIMIT_SIZE_IMAGE
                && bitmapHeight > LIMIT_SIZE_IMAGE && bitmapWidth > bitmapHeight)) {
          int width = context.getWallpaperDesiredMinimumWidth();
          int height = context.getWallpaperDesiredMinimumHeight();
          if (bitmap.getWidth() != width
              || bitmap.getHeight() != height) {
            scaledBitmap = ImageUtilities.scale(bitmap, width,
                height, true);
            bitmap.recycle();
          }
        }
        success = StreamUtils.saveBitmap(context, scaledBitmap, mFile
            .getName());
      }
    } catch (Exception e) {
      Log.e(TAG, "Photo not loaded", e);
    }
    return success;
  }

  @Override
  public void onPostExecute(Boolean result) {
    if (!result) {
      cropWallpaperExecutor.onPostExecuteError();
    } else {
      final int width = context.getWallpaperDesiredMinimumWidth();
      final int height = context.getWallpaperDesiredMinimumHeight();

      final Intent intent = new Intent("com.android.camera.action.CROP");
      intent.setClassName("com.android.camera",
          "com.android.camera.CropImage");
      intent.setData(Uri.fromFile(mFile));
      intent.putExtra("outputX", width);
      intent.putExtra("outputY", height);
      intent.putExtra("aspectX", width);
      intent.putExtra("aspectY", height);
      intent.putExtra("scale", true);
      intent.putExtra("noFaceDetection", true);
      intent.putExtra("output", Uri.parse("file:/"
          + mFile.getAbsolutePath()));

      cropWallpaperExecutor.onPostExecuteSuccess(intent);
    }

    cropWallpaperExecutor.onPostExecuteFinish();
  }
}
Java Source Code List
