recyclerView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
return true;
}
});
References
https://stackoverflow.com/questions/30531091/how-to-disable-recyclerview-scrolling
RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) viewToLayout.getLayoutParams(); params.addRule(RelativeLayout.BELOW, R.id.below_id);
private fun cacheFiles(files: List<MediaFile>?) {
if (files != null) {
val measuredWidth = Statics.getScreenWidth() / 4
//val requestOption = RequestOptions.overrideOf(width, width)
for (f in files) {
if (f.mimeType.startsWith("image")) {
GlideApp.with(CachePupli.context)
.load(File(f.path))
.diskCacheStrategy(DiskCacheStrategy.ALL)
.override(measuredWidth, measuredWidth)
.centerCrop()
.submit(measuredWidth, measuredWidth)
}
}
}
}
References
https://github.com/bumptech/glide/wiki/Loading-and-Caching-on-Background-Threads
android {
defaultConfig {
vectorDrawables.useSupportLibrary = true
}
}
dependencies {
compile 'com.android.support:appcompat-v7:23.2.0'
}
References
https://developer.android.com/studio/write/vector-asset-studio.html
https://developer.android.com/guide/topics/graphics/vector-drawable-resources.html
http://inloop.github.io/svg2android/
https://github.com/BigBadaboom/androidsvg
int memClass = ( ( ActivityManager) activity.getSystemService( Context.ACTIVITY_SERVICE ) ).getMemoryClass(); int cacheSize = 1024 * 1024 * memClass / 8; LruCache cache = new LruCache<String, Bitmap>( cacheSize );
References
http://www.vogella.com/tutorials/AndroidApplicationOptimization/article.html
https://developer.android.com/reference/android/util/LruCache.html
https://developer.android.com/samples/DisplayingBitmaps/src/com.example.android.displayingbitmaps/util/DiskLruCache.html
https://developer.android.com/topic/performance/graphics/cache-bitmap.html
recyclerView.getRecycledViewPool().setMaxRecycledViews(VIEW_TYPE,0);
References
https://stackoverflow.com/questions/20721752/prevent-the-adapter-from-recycling-views-on-scroll
FileAlterationObserver observer = new FileAlterationObserver("pathToDir");
FileAlterationMonitor monitor = new FileAlterationMonitor(POLL_INTERVAL);
FileAlterationListener listener = new FileAlterationListenerAdaptor() {
@Override
public void onFileCreate(File file) {
// code for processing creation event
}
@Override
public void onFileDelete(File file) {
// code for processing deletion event
}
@Override
public void onFileChange(File file) {
// code for processing change event
}
};
observer.addListener(listener);
monitor.addObserver(observer);
monitor.start();
References
http://www.baeldung.com/java-watchservice-vs-apache-commons-io-monitor-library
BroadcastReceiverOnBootComplete.java
public class BroadcastReceiverOnBootComplete extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equalsIgnoreCase(Intent.ACTION_BOOT_COMPLETED)) {
Intent serviceIntent = new Intent(context, AndroidServiceStartOnBoot.class);
context.startService(serviceIntent);
}
}
}
AndroidServiceStartOnBoot.java
public class AndroidServiceStartOnBoot extends Service {
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
// here you can add whatever you want this service to do
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.javacodegeeks.androidserviceonbootexample">
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-permission>
<receiver
android:name="com.javacodegeeks.androidserviceonbootexample.BroadcastReceiverOnBootComplete"
android:enabled="true"
android:exported="false">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.PACKAGE_REPLACED" />
<data android:scheme="package" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.PACKAGE_ADDED" />
<data android:scheme="package" />
</intent-filter>
</receiver>
<service android:name="com.javacodegeeks.androidserviceonbootexample.AndroidServiceStartOnBoot"></service>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme">
<activity
android:name="com.javacodegeeks.androidserviceonbootexample.MainActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest
>
if we want to be sure our service is sticky
override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
if (workerThread == null) {
workerThread = Thread(run)
workerThread!!.start()
Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();
}
return Service.START_STICKY
}
and
override fun onTaskRemoved(rootIntent: Intent?) {
val restartService = Intent(applicationContext,
this.javaClass)
restartService.`package` = packageName
val restartServicePI = PendingIntent.getService(
applicationContext, 1, restartService,
PendingIntent.FLAG_ONE_SHOT)
val alarmService = applicationContext.getSystemService(Context.ALARM_SERVICE) as AlarmManager
alarmService.set(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime() + 5000, restartServicePI)
}
References
http://blog.vogella.com/2011/12/11/automatically-starting-services-in-android-after-booting/
https://examples.javacodegeeks.com/android/core/activity/android-start-service-boot-example/
http://www.framentos.com/en/android-tutorial/2012/08/01/how-to-start-a-service-at-boot-in-android/
private class PathFileObserver extends FileObserver{
static final String TAG="FILEOBSERVER";
/**
* should be end with File.separator
*/
String rootPath;
static final int mask = (FileObserver.CREATE |
FileObserver.DELETE |
FileObserver.DELETE_SELF |
FileObserver.MODIFY |
FileObserver.MOVED_FROM |
FileObserver.MOVED_TO |
FileObserver.MOVE_SELF);
public PathFileObserver(String root){
super(root, mask);
if (! root.endsWith(File.separator)){
root += File.separator;
}
rootPath = root;
}
public void onEvent(int event, String path) {
switch(event){
case FileObserver.CREATE:
Log.d(TAG, "CREATE:" + rootPath + path);
break;
case FileObserver.DELETE:
Log.d(TAG, "DELETE:" + rootPath + path);
break;
case FileObserver.DELETE_SELF:
Log.d(TAG, "DELETE_SELF:" + rootPath + path);
break;
case FileObserver.MODIFY:
Log.d(TAG, "MODIFY:" + rootPath + path);
break;
case FileObserver.MOVED_FROM:
Log.d(TAG, "MOVED_FROM:" + rootPath + path);
break;
case FileObserver.MOVED_TO:
Log.d(TAG, "MOVED_TO:" + path);
break;
case FileObserver.MOVE_SELF:
Log.d(TAG, "MOVE_SELF:" + path);
break;
default:
// just ignore
break;
}
}
public void close(){
super.finalize();
}
}
References
https://gist.github.com/shirou/659180