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Written by: Stanko Milosev

Category: Android

Published: 15 April 2016

Last Updated: 15 April 2016

Hits: 4000

Recently I had a problem that I needed to send some text from Android over webview to JavaScript, but with new lines included, problem was that webview didn't respect \r\n.

This is my solution:

...
receivedPacket = new DatagramPacket(buf, buf.length);
...
final String strReceivedPacket = new String(receivedPacket.getData(), 0, receivedPacket.getLength()).replaceAll("\r\n", "\\\\r\\\\n");

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Written by: Stanko Milosev

Category: Android

Published: 08 March 2016

Last Updated: 08 March 2016

Hits: 4723

Just a few comments on my investigation about building and installing Android application.

In Linux go to root folder of your application and write something like:

./gradlew build

build means build.gradle actually, or something like  ./gradlew assembleDebug, with that you will build application with debug type. Check the source in /app/build.gradle.

After building we can install application with command like:

adb install -d -r myApp.apk

Where:

-d Direct an adb command to the only attached USB device.
-r Reinstall an exisiting app, keeping its data.

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Written by: Stanko Milosev

Category: Android

Published: 20 January 2016

Last Updated: 20 January 2016

Hits: 4469

For example we have view:

<TextView
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:text="Hello World!"
	android:background="@drawable/black"/>

Notice line:

android:background="@drawable/black"

This means that I've created new file in drawable folder /app/src/main/res/drawable/black.xml which looks like:

<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
    <solid android:color="#ffffff" />
    <stroke android:width="1dip" android:color="#000000"/>
</shape>