این وبسایت یک نسخه آزمایشی از سایت developer android می‌باشد که در حال ترجمه می‌باشد.
برای پیوستن به تیم ترجمه و خواندن مستندات اینجا کلیک کنید.
LNotifications / src / com.example.android.lnotifications /

OtherMetadataFragment.java

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/*
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* Copyright 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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*     http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.lnotifications;
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import android.app.Activity;
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import android.app.Fragment;
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import android.app.Notification;
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import android.app.NotificationManager;
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import android.content.Context;
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import android.content.Intent;
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import android.database.Cursor;
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import android.graphics.Bitmap;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.net.Uri;
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import android.os.Bundle;
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import android.provider.ContactsContract;
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import android.provider.MediaStore;
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import android.util.Log;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.ArrayAdapter;
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import android.widget.Button;
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import android.widget.ImageView;
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import android.widget.Spinner;
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import android.widget.TextView;
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import android.widget.Toast;
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import java.io.IOException;
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import java.util.Random;
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/**
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 * Fragment that demonstrates how to attach metadata introduced in Android L, such as
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 * priority data, notification category and person data.
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 */
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public class OtherMetadataFragment extends Fragment {
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    private static final String TAG = OtherMetadataFragment.class.getSimpleName();
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    /**
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     * Request code used for picking a contact.
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     */
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    public static final int REQUEST_CODE_PICK_CONTACT = 1;
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    /**
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     * Incremental Integer used for ID for notifications so that each notification will be
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     * treated differently.
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     */
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    private Integer mIncrementalNotificationId = Integer.valueOf(0);
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    private NotificationManager mNotificationManager;
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    /**
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     * Button to show a notification.
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     */
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    private Button mShowNotificationButton;
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    /**
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     *  Spinner that holds possible categories used for a notification as
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     *  {@link Notification.Builder#setCategory(String)}.
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     */
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    private Spinner mCategorySpinner;
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    /**
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     * Spinner that holds possible priorities used for a notification as
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     * {@link Notification.Builder#setPriority(int)}.
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     */
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    private Spinner mPrioritySpinner;
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    /**
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     * Holds a URI for the person to be attached to the notification.
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     */
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    //@VisibleForTesting
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    Uri mContactUri;
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    /**
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     * Use this factory method to create a new instance of
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     * this fragment using the provided parameters.
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     *
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     * @return A new instance of fragment NotificationFragment.
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     */
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    public static OtherMetadataFragment newInstance() {
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        OtherMetadataFragment fragment = new OtherMetadataFragment();
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        fragment.setRetainInstance(true);
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        return fragment;
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    }
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    public OtherMetadataFragment() {
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        // Required empty public constructor
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    }
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    @Override
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    public void onCreate(Bundle savedInstanceState) {
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        super.onCreate(savedInstanceState);
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        mNotificationManager = (NotificationManager) getActivity().getSystemService(Context
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                .NOTIFICATION_SERVICE);
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    }
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    @Override
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    public View onCreateView(LayoutInflater inflater, ViewGroup container,
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                             Bundle savedInstanceState) {
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        // Inflate the layout for this fragment
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        return inflater.inflate(R.layout.fragment_other_metadata, container, false);
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    }
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    @Override
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    public void onViewCreated(View view, Bundle savedInstanceState) {
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        super.onViewCreated(view, savedInstanceState);
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        mShowNotificationButton = (Button) view.findViewById(R.id.show_notification_button);
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        mShowNotificationButton.setOnClickListener(new View.OnClickListener() {
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            @Override
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            public void onClick(View view) {
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                Priority selectedPriority = (Priority) mPrioritySpinner.getSelectedItem();
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                Category selectedCategory = (Category) mCategorySpinner.getSelectedItem();
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                showNotificationClicked(selectedPriority, selectedCategory, mContactUri);
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            }
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        });
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        mCategorySpinner = (Spinner) view.findViewById(R.id.category_spinner);
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        ArrayAdapter<Category> categoryArrayAdapter = new ArrayAdapter<Category>(getActivity(),
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                android.R.layout.simple_spinner_item, Category.values());
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        categoryArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
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        mCategorySpinner.setAdapter(categoryArrayAdapter);
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        mPrioritySpinner = (Spinner) view.findViewById(R.id.priority_spinner);
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        ArrayAdapter<Priority> priorityArrayAdapter = new ArrayAdapter<Priority>(getActivity(),
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                android.R.layout.simple_spinner_item, Priority.values());
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        priorityArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
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        mPrioritySpinner.setAdapter(priorityArrayAdapter);
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        view.findViewById(R.id.attach_person).setOnClickListener(new View.OnClickListener() {
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            @Override
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            public void onClick(View view) {
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                findContact();
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            }
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        });
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        view.findViewById(R.id.contact_entry).setVisibility(View.GONE);
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    }
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    @Override
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    public void onActivityResult(int requestCode, int resultCode, Intent data) {
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        super.onActivityResult(requestCode, resultCode, data);
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        switch (requestCode) {
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            case REQUEST_CODE_PICK_CONTACT:
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                if (resultCode == Activity.RESULT_OK) {
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                    Uri contactUri = data.getData();
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                    mContactUri = contactUri;
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                    updateContactEntryFromUri(contactUri);
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                }
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                break;
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        }
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    }
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    /**
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     * Invoked when {@link #mShowNotificationButton} is clicked.
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     * Creates a new notification and sets metadata passed as arguments.
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     *
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     * @param priority   The priority metadata.
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     * @param category   The category metadata.
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     * @param contactUri The URI to be added to the new notification as metadata.
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     *
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     * @return A Notification instance.
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     */
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    //@VisibleForTesting
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    Notification createNotification(Priority priority, Category category, Uri contactUri) {
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        Notification.Builder notificationBuilder = new Notification.Builder(getActivity())
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                .setContentTitle("Notification with other metadata")
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                .setSmallIcon(R.drawable.ic_launcher_notification)
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                .setPriority(priority.value)
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                .setCategory(category.value)
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                .setContentText(String.format("Category %s, Priority %s", category.value,
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                        priority.name()));
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        if (contactUri != null) {
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            notificationBuilder.addPerson(contactUri.toString());
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            Bitmap photoBitmap = loadBitmapFromContactUri(contactUri);
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            if (photoBitmap != null) {
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                notificationBuilder.setLargeIcon(photoBitmap);
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            }
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        }
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        return notificationBuilder.build();
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    }
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    /**
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     * Invoked when {@link #mShowNotificationButton} is clicked.
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     * Creates a new notification and sets metadata passed as arguments.
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     *
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     * @param priority   The priority metadata.
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     * @param category   The category metadata.
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     * @param contactUri The URI to be added to the new notification as metadata.
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     */
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    private void showNotificationClicked(Priority priority, Category category, Uri contactUri) {
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        // Assigns a unique (incremented) notification ID in order to treat each notification as a
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        // different one. This helps demonstrate how a priority flag affects ordering.
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        mIncrementalNotificationId = new Integer(mIncrementalNotificationId + 1);
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        mNotificationManager.notify(mIncrementalNotificationId, createNotification(priority,
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                category, contactUri));
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        Toast.makeText(getActivity(), "Show Notification clicked", Toast.LENGTH_SHORT).show();
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    }
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    private void findContact() {
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        Intent intent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
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        startActivityForResult(intent, REQUEST_CODE_PICK_CONTACT);
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    }
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    /**
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     * Returns a {@link Bitmap} from the Uri specified as the argument.
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     *
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     * @param contactUri The Uri from which the result Bitmap is created.
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     * @return The {@link Bitmap} instance retrieved from the contactUri.
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     */
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    private Bitmap loadBitmapFromContactUri(Uri contactUri) {
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        if (contactUri == null) {
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            return null;
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        }
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        Bitmap result = null;
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        Cursor cursor = getActivity().getContentResolver().query(contactUri, null, null, null,
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                null);
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        if (cursor != null && cursor.moveToFirst()) {
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            int idx = cursor.getColumnIndex(ContactsContract.Contacts.PHOTO_ID);
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            String hasPhoto = cursor.getString(idx);
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            Uri photoUri = Uri.withAppendedPath(contactUri, ContactsContract.Contacts.Photo
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                    .CONTENT_DIRECTORY);
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            if (hasPhoto != null) {
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                try {
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                    result = MediaStore.Images.Media.getBitmap(getActivity().getContentResolver()
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                            , photoUri);
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                } catch (IOException e) {
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                    Log.e(TAG, String.format("Failed to load resource. Uri %s", photoUri), e);
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                }
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            } else {
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                Drawable defaultContactDrawable = getActivity().getResources().getDrawable(R
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                        .drawable.ic_contact_picture);
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                result = ((BitmapDrawable) defaultContactDrawable).getBitmap();
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            }
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        }
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        return result;
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    }
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    /**
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     * Updates the Contact information on the screen when a contact is picked.
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     *
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     * @param contactUri The Uri from which the contact is retrieved.
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     */
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    private void updateContactEntryFromUri(Uri contactUri) {
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        Cursor cursor = getActivity().getContentResolver().query(contactUri, null, null, null,
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                null);
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        if (cursor != null && cursor.moveToFirst()) {
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            int idx = cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME);
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            String name = cursor.getString(idx);
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            idx = cursor.getColumnIndex(ContactsContract.Contacts.PHOTO_ID);
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            String hasPhoto = cursor.getString(idx);
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            Uri photoUri = Uri.withAppendedPath(contactUri, ContactsContract.Contacts.Photo
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                    .CONTENT_DIRECTORY);
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            ImageView contactPhoto = (ImageView) getActivity().findViewById(R.id.contact_photo);
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            if (hasPhoto != null) {
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                contactPhoto.setImageURI(photoUri);
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            } else {
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                Drawable defaultContactDrawable = getActivity().getResources().getDrawable(R
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                        .drawable.ic_contact_picture);
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                contactPhoto.setImageDrawable(defaultContactDrawable);
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            }
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            TextView contactName = (TextView) getActivity().findViewById(R.id.contact_name);
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            contactName.setText(name);
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            getActivity().findViewById(R.id.contact_entry).setVisibility(View.VISIBLE);
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            getActivity().findViewById(R.id.attach_person).setVisibility(View.GONE);
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            getActivity().findViewById(R.id.click_to_change).setOnClickListener(new View.OnClickListener() {
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                @Override
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                public void onClick(View view) {
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                    findContact();
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                }
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            });
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            Log.i(TAG, String.format("Contact updated. Name %s, PhotoUri %s", name, photoUri));
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        }
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    }
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    /**
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     * Enum indicating possible categories in {@link Notification} used from
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     * {@link #mCategorySpinner}.
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     */
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    //@VisibleForTesting
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    static enum Category {
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        ALARM("alarm"),
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        CALL("call"),
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        EMAIL("email"),
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        ERROR("err"),
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        EVENT("event"),
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        MESSAGE("msg"),
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        PROGRESS("progress"),
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        PROMO("promo"),
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        RECOMMENDATION("recommendation"),
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        SERVICE("service"),
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        SOCIAL("social"),
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        STATUS("status"),
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        SYSTEM("sys"),
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        TRANSPORT("transport");
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        private final String value;
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        Category(String value) {
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            this.value = value;
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        }
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        @Override
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        public String toString() {
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            return value;
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        }
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    }
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    /**
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     * Enum indicating possible priorities in {@link Notification} used from
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     * {@link #mPrioritySpinner}.
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     */
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    //@VisibleForTesting
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    static enum Priority {
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        DEFAULT(Notification.PRIORITY_DEFAULT),
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        MAX(Notification.PRIORITY_MAX),
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        HIGH(Notification.PRIORITY_HIGH),
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        LOW(Notification.PRIORITY_LOW),
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        MIN(Notification.PRIORITY_MIN);
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