To help me remember the meaning of padding, I think of a big coat with lots of thick cotton padding. I’m inside my coat, but me and my padded coat are together. We’re a unit. But to remember margin, I think of, “Hey, give me some margin!” It’s the empty space between me and you. … Read more
If you are using an ActionBarActivity then you can tell Android to use the Toolbar as the ActionBar like so: Toolbar toolbar = (Toolbar) findViewById(R.id.my_awesome_toolbar); setSupportActionBar(toolbar); And then calls to getSupportActionBar().setDisplayHomeAsUpEnabled(true); getSupportActionBar().setDisplayShowHomeEnabled(true); will work. You can also use that in Fragments that are attached to ActionBarActivities you can use it like this: ((ActionBarActivity) getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true); ((ActionBarActivity) … Read more
Yes, by default Android will scale your image down to fit the ImageView, maintaining the aspect ratio. However, make sure you’re setting the image to the ImageView using android:src=”…” rather than android:background=”…”. src= makes it scale the image maintaining aspect ratio, but background= makes it scale and distort the image to make it fit exactly … Read more
Easier way than previous answers: Put this into ~/.gradle/gradle.properties RELEASE_STORE_FILE={path to your keystore} RELEASE_STORE_PASSWORD=***** RELEASE_KEY_ALIAS=***** RELEASE_KEY_PASSWORD=***** Modify your app/build.gradle, and add this inside the android { code block: … signingConfigs { release { storeFile file(RELEASE_STORE_FILE) storePassword RELEASE_STORE_PASSWORD keyAlias RELEASE_KEY_ALIAS keyPassword RELEASE_KEY_PASSWORD // Optional, specify signing versions used v1SigningEnabled true v2SigningEnabled true } } buildTypes { … Read more
You can set the EditText to have a custom transparent drawable or just use android:background=”@android:color/transparent” or android:background=”@null” or Programmatically editText.setBackgroundResource(android.R.color.transparent);
Android activities are stored in the activity stack. Going back to a previous activity could mean two things. You opened the new activity from another activity with startActivityForResult. In that case you can just call the finishActivity() function from your code and it’ll take you back to the previous activity. Keep track of the activity … Read more
Using this code, you can get the runtime display’s width & height: DisplayMetrics displayMetrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(displayMetrics); int height = displayMetrics.heightPixels; int width = displayMetrics.widthPixels; In a view you need to do something like this: ((Activity) getContext()).getWindowManager() .getDefaultDisplay() .getMetrics(displayMetrics); In some scenarios, where devices have a navigation bar, you have to check at runtime: … Read more
I’m hoping someone can provide some concrete examples of best use cases for each. Use Retrofit if you are communicating with a Web service. Use the peer library Picasso if you are downloading images. Use OkHTTP if you need to do HTTP operations that lie outside of Retrofit/Picasso. Volley roughly competes with Retrofit + Picasso. … Read more
The basic problem is, that you have to wait for the drawing phase for the actual measurements (especially with dynamic values like wrap_content or match_parent), but usually this phase hasn’t been finished up to onResume(). So you need a workaround for waiting for this phase. There a are different possible solutions to this: 1. Listen … Read more
Look at the LocalService example. Your Service returns an instance of itself to consumers who call onBind. Then you can directly interact with the service, e.g. registering your own listener interface with the service, so that you can get callbacks.