src/com/android/gallery3d/app/Wallpaper.java

/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.gallery3d.app;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.Display;

/**
 * Wallpaper picker for the gallery application. This just redirects to the
 * standard pick action.
 */
public class Wallpaper extends Activity {
    @SuppressWarnings("unused")
    private static final String TAG = "Wallpaper";

    private static final String IMAGE_TYPE = "image/*";
    private static final String KEY_STATE = "activity-state";
    private static final String KEY_PICKED_ITEM = "picked-item";

    private static final int STATE_INIT = 0;
    private static final int STATE_PHOTO_PICKED = 1;

    private int mState = STATE_INIT;
    private Uri mPickedItem;

    @Override
    protected void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        if (bundle != null) {
            mState = bundle.getInt(KEY_STATE);
            mPickedItem = (Uri) bundle.getParcelable(KEY_PICKED_ITEM);
        }
    }

    @Override
    protected void onSaveInstanceState(Bundle saveState) {
        saveState.putInt(KEY_STATE, mState);
        if (mPickedItem != null) {
            saveState.putParcelable(KEY_PICKED_ITEM, mPickedItem);
        }
    }

    @SuppressWarnings("fallthrough")
    @Override
    protected void onResume() {
        super.onResume();
        Intent intent = getIntent();
        switch (mState) {
            case STATE_INIT: {
                mPickedItem = intent.getData();
                if (mPickedItem == null) {
                    Intent request = new Intent(Intent.ACTION_GET_CONTENT)
                            .setClass(this, DialogPicker.class)
                            .setType(IMAGE_TYPE);
                    startActivityForResult(request, STATE_PHOTO_PICKED);
                    return;
                }
                mState = STATE_PHOTO_PICKED;
                // fall-through
            }
            case STATE_PHOTO_PICKED: {
                int width = getWallpaperDesiredMinimumWidth();
                int height = getWallpaperDesiredMinimumHeight();
                Display display = getWindowManager().getDefaultDisplay();
                float spotlightX = (float) display.getWidth() / width;
                float spotlightY = (float) display.getHeight() / height;
                Intent request = new Intent(CropImage.ACTION_CROP)
                        .setDataAndType(mPickedItem, IMAGE_TYPE)
                        .addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT)
                        .putExtra(CropImage.KEY_OUTPUT_X, width)
                        .putExtra(CropImage.KEY_OUTPUT_Y, height)
                        .putExtra(CropImage.KEY_ASPECT_X, width)
                        .putExtra(CropImage.KEY_ASPECT_Y, height)
                        .putExtra(CropImage.KEY_SPOTLIGHT_X, spotlightX)
                        .putExtra(CropImage.KEY_SPOTLIGHT_Y, spotlightY)
                        .putExtra(CropImage.KEY_SCALE, true)
                        .putExtra(CropImage.KEY_NO_FACE_DETECTION, true)
                        .putExtra(CropImage.KEY_SET_AS_WALLPAPER, true);
                startActivity(request);
                finish();
            }
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode != RESULT_OK) {
            setResult(resultCode);
            finish();
            return;
        }
        mState = requestCode;
        if (mState == STATE_PHOTO_PICKED) {
            mPickedItem = data.getData();
        }

        // onResume() would be called next
    }
}