vxhviet

Source: StackOverflow, Quora, StackOverflow

Question: Add java library to Android Studio project with maven repository?

Answer: These modifications go in the build.gradle file in your module's directory (not the build file in the project root directory).

First, set up the repository where it can find the dependency.

vxhviet

Source: StackOverflow

Question: I would like to know how can I apply full screen theme ( no title bar + no actionbar ) to an activity. I am using AppCompat library from support package v7.

Answer: When you use Theme.AppCompat in your application you can use FullScreenTheme by adding the code below to styles.xml.

<style name="Theme.AppCompat.Light.NoActionBar.FullScreen" parent="@style/Theme.AppCompat.Light">
        <item name="windowNoTitle">true</item>
        <item name="windowActionBar">false</item>
 true

vxhviet

Source: StackOverflow

Question: Open gallery and choose video.

Answer:

Use this for the picking Intent:

Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
intent.setType("video/*");

vxhviet

Source: StackOverflow, StackOverflow

Question: How to get the path of all videos stored on device.

Answer:

private String[] getAllVideoPath(Context context) {
        Uri uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
        String[] projection = { MediaStore.Video.VideoColumns.DATA };

vxhviet

Source: StackOverflow, Vogella

Question: Build a simple grid layout to display text inside an Activity.

Answer: In your build.gradle add the following (get the lastest version here

dependencies {
    compile 'com.android.support:recyclerview-v7:23.2.1'

vxhviet

Source: BigNerdRanch, Android Programming, The Big Nerd Ranch Guide (2nd Edition) (page 99).

Question: pass data to another activity for further processing.

Answer:

An activity may be started from several different places, so you should define keys for extras on the activities that retrieve and use them. Using your package name as a qualifier for your extra, as shown below, prevents name collisions with extras from other apps. Naively, you could return to CallingActivity and put the extra on the intent, but there is a better approach. There is no reason for CallingActivity, or any other code in your app, to know the implementation

vxhviet

Source: StackOverflow

Question: How to send databack to the CallingActivity?

Answer: In CallingActivity, uses startActivityForResult:

public static final int REQUEST_VIDEO = 0;
...

vxhviet

Question: To convert a path to Uri

Answer:

To avoid nasty bug:

• for file use Uri.fromFile(new File(filePath))

• for directory use Uri.parse(directoryPath)

vxhviet

Source: StackOverflow

Question: How to delete a whole folder and content?

Answer: You can delete files and folders recursively like this:

void deleteRecursive(File fileOrDirectory) {
 if (fileOrDirectory.isDirectory())

vxhviet

Source: GitHub

Question: After upgrading to Android Studio 2.0, constant's color is an eye sore how to change it?

Answer: Go to Settings > Editor > Color & Fonts > YourLanguage, select an element with a "wrong" color, and check "Use inherited attributes" or change to your desired color.