com.grokkingandroid.sampleapp.samples.data.contentprovider.lentitems.CPSampleActivity.java Source code

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Here is the source code for com.grokkingandroid.sampleapp.samples.data.contentprovider.lentitems.CPSampleActivity.java

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/*
 * Copyright (C) 2013 Wolfram Rittmeyer
 *
 * 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.grokkingandroid.sampleapp.samples.data.contentprovider.lentitems;

import android.content.ContentResolver;
import android.content.ContentUris;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;

import com.grokkingandroid.sampleapp.samples.data.contentprovider.BaseActivity;
import com.grokkingandroid.sampleapp.samples.data.contentprovider.R;
import com.grokkingandroid.sampleapp.samples.data.contentprovider.lentitems.LentItemDisplayFragment.DisplayCallback;
import com.grokkingandroid.sampleapp.samples.data.contentprovider.lentitems.LentItemListFragment.MasterCallback;
import com.grokkingandroid.sampleapp.samples.data.contentprovider.provider.LentItemsContract.Items;

/**
 * The main activity of this sample. Since this sample uses a listview
 * it's structure is vastly different from the other samples apps
 * of GrokkingAndroid and thus this activity as well as the fragments 
 * are structured differently as well.
 *
 * @author Wolfram Rittmeyer
 */
public class CPSampleActivity extends BaseActivity implements MasterCallback, DisplayCallback {

    private static final String KEY_SPINNER_POS = "keySpinnerPos";

    private int mCurrSpinnerPos = 0;
    private boolean mTwoPane = false;

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.activity_fragment_container);

        if (getResources().getBoolean(R.bool.twoPane)) {
            mTwoPane = true;
        }
        if (icicle == null) {
            // config change
            LentItemListFragment fragment = LentItemListFragment.newInstance(mTwoPane);
            FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
            transaction.replace(R.id.demo_fragment_container, fragment);
            if (mTwoPane) {
                //TODO: add detail fragment; may be empty
                // detail fragment must be informed when loader of the listfragment ends 
                // to get the id of the first item - which is highlighted by default
                transaction.add(null, null);
            }
            transaction.commit();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        // do not forget to clean up, if necessary
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putInt(KEY_SPINNER_POS, mCurrSpinnerPos);
    }

    public void switchToForm(long itemId) {
        if (mTwoPane) {
            // swap fragments
        } else {
            // call formactivity
            Fragment f = LentItemFormFragment.newInstance(itemId);
            FragmentTransaction transact = getSupportFragmentManager().beginTransaction();
            transact.replace(R.id.demo_fragment_container, f);
            transact.addToBackStack("cpsample");
            transact.commit();
        }
    }

    public void displayItem(long itemId) {
        if (mTwoPane) {
            // swap fragments
        } else {
            // call formactivity
            Fragment f = LentItemDisplayFragment.newInstance(itemId);
            FragmentTransaction transact = getSupportFragmentManager().beginTransaction();
            transact.replace(R.id.demo_fragment_container, f);
            transact.addToBackStack("cpsample");
            transact.commit();
        }
    }

    @Override
    public void addItem() {
        // it's the addition of a new item, so the id to pass is -1
        Fragment f = LentItemFormFragment.newInstance(-1);
        FragmentTransaction transact = getSupportFragmentManager().beginTransaction();
        transact.replace(R.id.demo_fragment_container, f);
        transact.addToBackStack("cpsample");
        transact.commit();
    }

    public void deleteItem(final long itemId) {
        final ContentResolver resolver = getContentResolver();
        new Thread(new Runnable() {
            // for as long as this runs the activity will not be GCed
            public void run() {
                Uri delUri = ContentUris.withAppendedId(Items.CONTENT_URI, itemId);
                int resCount = resolver.delete(delUri, null, null);
                if (resCount == 0) {
                    // do s.th. useful
                }
            }
        }).start();
        getSupportFragmentManager().popBackStack();
    }

}