src/com/android/camera/DeleteImage.java

/*
 * Copyright (C) 2009 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.camera;

import android.app.Activity;
import android.content.ContentResolver;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.widget.ProgressBar;

import java.util.ArrayList;

public class DeleteImage extends Activity {

    @SuppressWarnings("unused")
    private static final String TAG = "DeleteImage";
    private ProgressBar mProgressBar;
    private ArrayList<Uri> mUriList;  // a list of image uri
    private int mIndex = 0;  // next image to delete
    private final Handler mHandler = new Handler();
    private final Runnable mDeleteNextRunnable = new Runnable() {
        public void run() {
            deleteNext();
        }
    };
    private ContentResolver mContentResolver;
    private boolean mPausing;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Intent intent = getIntent();
        mUriList = intent.getParcelableArrayListExtra("delete-uris");
        if (mUriList == null) {
            finish();
        }
        setContentView(R.layout.delete_image);
        mProgressBar = (ProgressBar) findViewById(R.id.delete_progress);
        mContentResolver = getContentResolver();
    }

    @Override
    protected void onResume() {
        super.onResume();
        mPausing = false;
        mHandler.post(mDeleteNextRunnable);
    }

    private void deleteNext() {
        if (mPausing) return;
        if (mIndex >= mUriList.size()) {
            finish();
            return;
        }
        Uri uri = mUriList.get(mIndex++);
        // The max progress value of the bar is set to 10000 in the xml file.
        mProgressBar.setProgress(mIndex * 10000 / mUriList.size());
        mContentResolver.delete(uri, null, null);
        mHandler.post(mDeleteNextRunnable);
    }

    @Override
    protected void onPause() {
        super.onPause();
        mPausing = true;
    }
}