Merge "Add API demo for monitoring media content."
This commit is contained in:
Dianne Hackborn
committed by
Android (Google) Code Review
Android (Google) Code Review
commit
ef77d26ce8
@@ -1253,6 +1253,17 @@
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</intent-filter>
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</activity>
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<activity android:name=".content.MediaContentObserver"
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android:label="@string/activity_media_content_observer">
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<intent-filter>
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<action android:name="android.intent.action.MAIN"/>
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<category android:name="android.intent.category.SAMPLE_CODE"/>
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</intent-filter>
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</activity>
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<service android:name=".content.MediaContentJob"
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android:permission="android.permission.BIND_JOB_SERVICE" />
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<activity android:name=".content.InstallApk" android:label="@string/activity_install_apk"
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android:enabled="@bool/atLeastHoneycombMR2">
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<intent-filter>
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54
samples/ApiDemos/res/layout/media_content_observer.xml
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54
samples/ApiDemos/res/layout/media_content_observer.xml
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@@ -0,0 +1,54 @@
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<?xml version="1.0" encoding="utf-8"?>
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<!-- Copyright (C) 2016 The Android Open Source Project
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:orientation="vertical">
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<LinearLayout android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:orientation="horizontal">
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<Button android:id="@+id/schedule_job"
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android:layout_width="wrap_content" android:layout_height="wrap_content"
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android:text="Schedule job">
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</Button>
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<Button android:id="@+id/cancel_job"
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android:layout_width="wrap_content" android:layout_height="wrap_content"
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android:text="Cancel job">
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</Button>
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</LinearLayout>
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<TextView
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_marginTop="4dp"
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android:textAppearance="?android:attr/textAppearanceLarge"
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android:text="Directly observed content changes:" />
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<ScrollView android:layout_width="match_parent"
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android:layout_height="0dp"
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android:layout_weight="1">
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<TextView
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android:id="@+id/changes_text"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:background="#ff303030"
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android:padding="4dp"
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android:textAppearance="?android:attr/textAppearanceMedium"
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/>
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</ScrollView>
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</LinearLayout>
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@@ -469,6 +469,8 @@
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<string name="activity_changed_contact">Content/Provider/Changed Contacts</string>
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<string name="activity_media_content_observer">Content/Provider/Media Content Observer</string>
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<string name="activity_install_apk">Content/Packages/Install Apk</string>
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<string name="ir_send">Send IR</string>
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@@ -0,0 +1,114 @@
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/**
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* Copyright (c) 2016, 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.apis.content;
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import android.app.job.JobInfo;
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import android.app.job.JobParameters;
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import android.app.job.JobScheduler;
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import android.app.job.JobService;
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import android.content.ComponentName;
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import android.content.Context;
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import android.net.Uri;
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import android.os.Handler;
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import android.provider.MediaStore;
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import android.widget.Toast;
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import com.example.android.apis.R;
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import java.util.List;
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/**
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* Stub job to execute when there is a change to any media: content URI.
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*/
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public class MediaContentJob extends JobService {
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static final Uri MEDIA_URI = Uri.parse("content://" + MediaStore.AUTHORITY + "/");
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final Handler mHandler = new Handler();
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final Runnable mWorker = new Runnable() {
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@Override public void run() {
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scheduleJob(MediaContentJob.this);
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jobFinished(mRunningParams, false);
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}
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};
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JobParameters mRunningParams;
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public static void scheduleJob(Context context) {
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JobScheduler js = context.getSystemService(JobScheduler.class);
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JobInfo.Builder builder = new JobInfo.Builder(R.id.schedule_job,
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new ComponentName(context, MediaContentJob.class));
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builder.addTriggerContentUri(new JobInfo.TriggerContentUri(MEDIA_URI,
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JobInfo.TriggerContentUri.FLAG_NOTIFY_FOR_DESCENDANTS));
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js.schedule(builder.build());
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}
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public static boolean isScheduled(Context context) {
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JobScheduler js = context.getSystemService(JobScheduler.class);
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List<JobInfo> jobs = js.getAllPendingJobs();
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if (jobs == null) {
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return false;
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}
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for (int i=0; i<jobs.size(); i++) {
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if (jobs.get(i).getId() == R.id.schedule_job) {
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return true;
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}
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}
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return false;
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}
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public static void cancelJob(Context context) {
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JobScheduler js = context.getSystemService(JobScheduler.class);
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js.cancel(R.id.schedule_job);
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}
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@Override
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public boolean onStartJob(JobParameters params) {
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mRunningParams = params;
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StringBuilder sb = new StringBuilder();
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sb.append("Media content has changed:\n");
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if (params.getTriggeredContentAuthorities() != null) {
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sb.append("Authorities: ");
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boolean first = true;
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for (String auth : params.getTriggeredContentAuthorities()) {
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if (first) {
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first = false;
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} else {
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sb.append(", ");
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}
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sb.append(auth);
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}
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if (params.getTriggeredContentUris() != null) {
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for (Uri uri : params.getTriggeredContentUris()) {
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sb.append("\n");
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sb.append(uri);
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}
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}
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} else {
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sb.append("(No content)");
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}
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Toast.makeText(this, sb.toString(), Toast.LENGTH_LONG).show();
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// We will emulate taking some time to do this work, so we can see batching happen.
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mHandler.postDelayed(mWorker, 20*1000);
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return true;
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}
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@Override
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public boolean onStopJob(JobParameters params) {
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mHandler.removeCallbacks(mWorker);
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return false;
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}
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}
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@@ -0,0 +1,92 @@
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/**
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* Copyright (c) 2016, 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.apis.content;
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import android.app.Activity;
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import android.database.ContentObserver;
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import android.net.Uri;
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import android.os.Bundle;
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import android.os.Handler;
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import android.util.Log;
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import android.view.View;
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import android.widget.TextView;
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import com.example.android.apis.R;
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public class MediaContentObserver extends Activity {
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ContentObserver mContentObserver;
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View mScheduleJob;
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View mCancelJob;
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TextView mDataText;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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mContentObserver = new ContentObserver(new Handler()) {
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public void onChange(boolean selfChange, Uri uri) {
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mDataText.append(uri.toString());
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mDataText.append("\n");
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}
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};
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Log.d("foo", "Observing: " + MediaContentJob.MEDIA_URI);
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// See res/any/layout/resources.xml for this view layout definition.
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setContentView(R.layout.media_content_observer);
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mScheduleJob = findViewById(R.id.schedule_job);
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mCancelJob = findViewById(R.id.cancel_job);
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mDataText = (TextView)findViewById(R.id.changes_text);
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mScheduleJob.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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MediaContentJob.scheduleJob(MediaContentObserver.this);
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updateButtons();
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}
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});
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mCancelJob.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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MediaContentJob.cancelJob(MediaContentObserver.this);
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updateButtons();
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}
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});
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updateButtons();
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getContentResolver().registerContentObserver(MediaContentJob.MEDIA_URI, true,
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mContentObserver);
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}
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void updateButtons() {
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if (MediaContentJob.isScheduled(this)) {
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mScheduleJob.setEnabled(false);
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mCancelJob.setEnabled(true);
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} else {
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mScheduleJob.setEnabled(true);
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mCancelJob.setEnabled(false);
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}
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}
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@Override
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protected void onDestroy() {
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super.onDestroy();
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getContentResolver().unregisterContentObserver(mContentObserver);
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}
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}
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