android-viewtreeobserver

Why we use ViewTreeObserver#addOnGlobalLayoutListener()

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问题 Why do we use ViewTreeObserver , please can anyone explain it? In below code creditsView is TextView object. By this whole code I understand that "this is to hide some text based on condition", but only thing is why we are using ViewTreeObserver ? mainLayout.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() { @Override public void onGlobalLayout() { int heightDiff = mainLayout.getRootView().getHeight() - mainLayout.getHeight(); if (heightDiff > 100)

Using ViewTreeObserver i am adding setMaxLines and setEllipsize in MaterialTextView inside RecyclerView.Adapter

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问题 I am set MaterialTextView inside RelativeLayout and set RelativeLayout size programmatically different size for every device. Then i have using ViewTreeObserver to set setMaxLines and setEllipsize in MaterialTextView but i am facing some problem show the text in MaterialTextView using RecyclerView.Adapter. I am using load more RecyclerView i am getting all data then after show text automatically in list and also notify data adapter then show text. not showing text inside MaterialTextView in

Using ViewTreeObserver i am adding setMaxLines and setEllipsize in MaterialTextView inside RecyclerView.Adapter

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Why does calling getWidth() on a View in onResume() return 0?

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问题 Everything I've read says you can't call getWidth() or getHeight() on a View in a constructor, but I'm calling them in onResume() . Shouldn't the screen's layout have been drawn by then? @Override protected void onResume() { super.onResume(); populateData(); } private void populateData() { LinearLayout test = (LinearLayout) findViewById(R.id.myview); double widthpx = test.getWidth(); } 回答1: A view still hasn't been drawn when onResume() is called, so its width and height are 0. You can "catch

Handling a Runnable thread during configuration changes

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问题 With the following codes, I was wondering how to handle a Runnable object (for a timer) and a ViewTreeObserver (for handling configuration changes between portrait and landscape) together in one activity, because my View (linearLayout) doesn't get recognized until later: MainActivity: public class MainActivity extends AppCompatActivity { private int displayWidth, displayHeight; private LinearLayout linearLayout; // Initializes fields for the timer. private TextView timer; private long

Why does calling getWidth() on a View in onResume() return 0?

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Everything I've read says you can't call getWidth() or getHeight() on a View in a constructor, but I'm calling them in onResume() . Shouldn't the screen's layout have been drawn by then? @Override protected void onResume() { super.onResume(); populateData(); } private void populateData() { LinearLayout test = (LinearLayout) findViewById(R.id.myview); double widthpx = test.getWidth(); } Onik A view still hasn't been drawn when onResume() is called, so its width and height are 0. You can "catch" when its size changes using OnGlobalLayoutListener() : yourView.getViewTreeObserver()

How to disable emojis programmatically in Android

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问题 I want to hide emojis and auto suggestions from keyboard programmatically. Its working in some Android devices but not in all devices. here's my code for hide auto suggestions: txtSingupemail.setInputType(InputType.TYPE_TEXT_VARIATION_FILTER | InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS |InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS); txtSignuppwd.setInputType(InputType.TYPE_TEXT_VARIATION_FILTER | InputType.TYPE_TEXT_VARIATION_PASSWORD); txtSignuppwd.setTransformationMethod