To open a web page in an Android app, we need to create a new Intent and start a new Activity with it. Here’s a Java method that we can re-use:
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private void goToUrl (String url) { Uri uriUrl = Uri.parse(url); Intent launchBrowser = new Intent(Intent.ACTION_VIEW, uriUrl); startActivity(launchBrowser); } |
Just pass the URL of the web page you’d like to open to this method. Source: How to open a website when a […]
If you want to trace the name of the method that’s being executed, the Java code snippet in this page might help you. This is especially handy when you are debugging by tracking every method that is executed. You can enclose these lines of codes in a function that you call in every method — […]
When I need to underline text in an app that I’m developing, I like doing it programmatically. The code is in the Java file, not in the XML. Maybe we should make a function for this where we pass the ID of the TextView whose content we’d like to underline.
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TextView myTextView = (TextView) findViewById(R.id.myTextViewID); String htmlString = "<u>" + myTextView.getText() + "</u>"; myTextView.setText(Html.fromHtml(htmlString)); |
Disadvantages in this method: […]
Just sharing the link to a “cheat sheet” that I found: Android Cheatsheet for Graphic Designers I think that this resource should have been said to be for developers too, because developers need to know about dimensions of graphics in the Android apps they develop.
We’re not going to use ViewOverlay here. We’ll use Dialog instead. The overlay does not show on button click. What I did was let the overlay appear when the activity is loaded. First, create the XML file for the contents of that dialog overlay. \app\src\main\res\layout\popup_content.xml
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<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:background="#78000000" android:padding="@dimen/activity_margin" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:textColor="#ffffff" android:text="This is your dialog with transparent background." android:layout_width="wrap_content" android:layout_height="wrap_content" /> <Button android:id="@+id/btn_close_overlay" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@color/colorPrimary" android:textColor="#ffffff" android:text="Dismiss"/> </LinearLayout> |
Then add the following code into your activity’s Java […]
Here are the recommended background image sizes in pixels for Android app development: xxxhdpi: 1280×1920 px xxhdpi: 960×1600 px xhdpi: 640×960 px hdpi: 480×800 px mdpi: 320×480 px ldpi: 240×320 px …as suggested in this StackOverflow page: Android: Background Image Size (in Pixel) which Support All Devices
If you use ImageView in your android app layout and you get that unwanted padding around the image, here’s an Android XML attribute that helped me solved the layout issue:
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<ImageView (...) android:adjustViewBounds="true" /> |
Add android:adjustViewBounds=”true” attribute to your ImageView XML tag and you’ll probably see the unwanted padding go away. According to the ImageView docs: android:adjustViewBounds Set […]
As a mobile app developer, we need to consider various screen sizes for a wide range of Android devices. Here’s a quick note of recommended image sizes for Android app icons: 36×36 for low-density (LDPI) 48×48 for medium-density (MDPI) 72×72 for high-density (HDPI) 96×96 for extra high-density (XHDPI) 180×180 for extra extra high-density (XXHDPI) 192×192 […]
You can still follow this tutorial if you’re using another version of Windows or if you’re using another Android device. You don’t strictly have to use a Windows 7 computer and an LG G3 phone. 🙂 Being a web developer and a frequent user of Android devices, I’ve always been curious about Android app development. […]
For a web developer who used mostly PHP and JavaScript for several years, plunging into Java can be challenging especially when it comes to data types. PHP and JavaScript are loosely typed languages, while Java is strict about types. I was told that in Android, List<String> is very commonly used, even more than arrays. And […]