안드로이드 스튜디오 도움되는 정보들 1
- Android – myLooper() vs getMainLooper()
- how to use postDelayed() correctly in android studio?
- How to use the SwipeRefreshLayout?
- Android sample bluetooth code to send a simple string via bluetooth
- How to add dividers and spaces between items in RecyclerView?
- Adding button action in custom notification
- Downloading a website to a string
- Android Handler Tutorial
- start activity with left to right mode
- material design FAB speed dial menu tutorial (Code with Joyce)
Android – myLooper() vs getMainLooper()
getMainLooper() – Returns the application’s main looper, which lives in the main thread of the application.
myLooper() – Return the Looper object associated with the current thread. Returns null if the calling thread is not associated with a Looper.
new Handler(Looper.getMainLooper()).post(new Runnable() {
// execute code that must be run on UI thread
});
https://stackoverflow.com/questions/34322498/android-mylooper-vs-getmainlooper
how to use postDelayed() correctly in android studio?
final Handler handler = new Handler(Looper.getMainLooper());
handler.postDelayed(new Runnable() {
@Override
public void run() {
Log.d("Handler", "Running Handler");
}
}, 1000);
https://stackoverflow.com/questions/42379301/how-to-use-postdelayed-correctly-in-android-studio
How to use the SwipeRefreshLayout?
implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
SwipeRefreshLayout mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_refresh_layout);
mSwipeRefreshLayout.setColorSchemeColors(Color.RED, Color.YELLOW, Color.GREEN, Color.BLUE);
mSwipeRefreshLayout.setOnRefreshListener(() -> {
mSwipeRefreshLayout.setRefreshing(false);
});
https://stackoverflow.com/questions/23014846/how-to-use-the-swiperefreshlayout
https://developer.android.com/training/swipe/add-swipe-interface
Android sample bluetooth code to send a simple string via bluetooth
How to add dividers and spaces between items in RecyclerView?
mRecyclerView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.VERTICAL));
Adding button action in custom notification
private void startNotification(){
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager notificationManager =
(NotificationManager) getSystemService(ns);
Notification notification = new Notification(R.drawable.ic_launcher, null,
System.currentTimeMillis());
RemoteViews notificationView = new RemoteViews(getPackageName(),
R.layout.mynotification);
//the intent that is started when the notification is clicked (works)
Intent notificationIntent = new Intent(this, FlashLight.class);
PendingIntent pendingNotificationIntent = PendingIntent.getActivity(this, 0,
notificationIntent, 0);
notification.contentView = notificationView;
notification.contentIntent = pendingNotificationIntent;
notification.flags |= Notification.FLAG_NO_CLEAR;
//this is the intent that is supposed to be called when the
//button is clicked
Intent switchIntent = new Intent(this, switchButtonListener.class);
PendingIntent pendingSwitchIntent = PendingIntent.getBroadcast(this, 0,
switchIntent, 0);
notificationView.setOnClickPendingIntent(R.id.closeOnFlash,
pendingSwitchIntent);
notificationManager.notify(1, notification);
}
public static class switchButtonListener extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Log.d("Here", "I am here");
FlashOnOff flashLight;
flashLight = new FlashOnOff();
flashLight.flashLightOff();
flashLight.releaseCamera();
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:orientation="horizontal"
android:weightSum="100" >
<ImageView
android:id="@+id/notifiation_image"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="30"
android:contentDescription="@string/appImage"
android:src="@drawable/ic_launcher" />
<TextView
android:id="@+id/appName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="50"
android:gravity="center"
android:text="@string/flashLightOn"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Button
android:id="@+id/closeOnFlash"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="20"
android:text="@string/close" />
</LinearLayout>
<receiver android:name="FlashLight$switchButtonListener" />
https://stackoverflow.com/questions/21925688/adding-button-action-in-custom-notification
7. Downloading a website to a string
try
{
URL url = new URL("http://yourwebpage.com");
// Read all the text returned by the server
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
String str;
while ((str = in.readLine()) != null)
{
// str is one line of text; readLine() strips the newline character(s)
// You can use the contain method here.
if(str.contains(editText.getText().toString))
{
You can perform your logic here!!!!!
}
}
in.close();
} catch (MalformedURLException e) {
} catch (IOException e) {
}
https://stackoverflow.com/questions/11590899/downloading-a-website-to-a-string
Android Handler Tutorial
핸들러는 백그라운드 쓰레드에서 UI 쓰레드와의 소통을 가능하게한다.
새 핸들러 인스턴스를 만들면 하나의 쓰레드와 그 쓰레드의 메시지 큐와 바인딩 된다.
public class MainActivity extends AppCompatActivity {
ProgressBar progressBar;
Button startProgress,stopProgress;
TextView textView;
int MAX = 100;
Handler mHandlerThread;
private static final int START_PROGRESS = 100;
private static final int UPDATE_COUNT = 101;
Thread thread1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
startProgress = (Button) findViewById(R.id.start_progress);
textView = (TextView) findViewById(R.id.textView);
progressBar.setMax(MAX);
thread1 = new Thread(new Runnable() {
@Override
public void run() {
for (int i = 0;i<100;i++){
Log.d("I",":"+i);
progressBar.setProgress(i);
try{
Thread.sleep(1000);
}
catch (InterruptedException ex){
ex.printStackTrace();
}
Message message = new Message();
message.what = UPDATE_COUNT;
message.arg1 = i;
mHandlerThread.sendMessage(message);
}
}
});
startProgress.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int currentProgess = progressBar.getProgress();
/*Message message = new Message();
message.what = START_PROGRESS;*/
mHandlerThread.sendEmptyMessage(START_PROGRESS);
}
});
}
@Override
protected void onResume() {
super.onResume();
mHandlerThread = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
if (msg.what == START_PROGRESS){
thread1.start();
}
else if(msg.what == UPDATE_COUNT){
textView.setText("Count"+msg.arg1);
}
}
};
}
}
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.manish.developer.threadapplication.MainActivity">
<ProgressBar
android:id="@+id/progressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true" />
<Button
android:id="@+id/start_progress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="@+id/progressBar"
android:layout_marginLeft="24dp"
android:layout_marginStart="24dp"
android:layout_marginTop="62dp"
android:text="Start" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/start_progress"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_marginEnd="85dp"
android:layout_marginRight="85dp"
android:textSize="16sp"
android:text="Count 1"
android:layout_alignTop="@+id/start_progress" />
</RelativeLayout>
https://medium.com/@manishgiri/android-handler-tutorial-ccda6994f01c
9. start activity with left to right mode
https://stackoverflow.com/questions/16648279/start-activity-with-left-to-right-mode
I’ll try to help you with the following example:
res/anim/trans_left_in.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:fromXDelta="100%p"
android:toXDelta="0"
android:duration="@android:integer/config_longAnimTime"/>
</set>
res/anim/trans_left_out.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:fromXDelta="0"
android:toXDelta="-100%p"
android:duration="@android:integer/config_longAnimTime"/>
</set>
res/anim/trans_right_in.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:fromXDelta="-100%p"
android:toXDelta="0"
android:duration="@android:integer/config_longAnimTime"/>
</set>
res/anim/trans_right_out.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:fromXDelta="0"
android:toXDelta="100%p"
android:duration="@android:integer/config_longAnimTime"/>
</set>
src/Activity2
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_traces);
overridePendingTransition(R.anim.trans_left_in, R.anim.trans_left_out);
...}
@Override
public void onBackPressed() {
super.onBackPressed();
overridePendingTransition(R.anim.trans_right_in, R.anim.trans_right_out);
}
material design FAB speed dial menu tutorial (Code with Joyce)
material design FAB로 메뉴 만들기/ FAB speed dial menu tutorial / floating action button tutorial (Code with Joyce)
https://www.youtube.com/watch?v=ircI_ABl2XE
https://material.io/components/buttons-floating-action-button#types-of-transitions