Android Blog – Android Blog is the place where I put code possible to be reused in near future.

Batch script for converting mp4 to gif using ffmpeg

Here is the batch script:

@echo off
for %%i in (*.mp4) do (
ffmpeg.exe -i "%%i" "%%i".gif
move "%%i".gif gif
move "%%i" mp4
)

Batch script for installing apks in folder

Here is the batch script:

@echo off
for /r %%i in (*.apk) do (
echo "Installing %%i";
adb install -r "%%i"
)

Or you can just download it.

Get current Activity name by adb shell

Here is the command:

adb shell "dumpsys window windows | grep -E 'mCurrentFocus'"

The output would be:

mCurrentFocus=Window{b6a99d1d0 u0 com.sec.android.app.launcher/com.sec.android.app.launcher.activities.LauncherActivity}

My activity name is: LauncherActivity

create RainbowSpan effect

public class RainbowSpan extends CharacterStyle implements UpdateAppearance {
    private final int[] colors;

    public RainbowSpan(Context context) {
        colors = new int[]{
                Color.parseColor("#FF0033"),
                Color.parseColor("#FF8000"),
                Color.parseColor("#FFE600"),
                Color.parseColor("#1AB34D"),
                Color.parseColor("#1A66FF"),
                Color.parseColor("#801AB3")
        };
    }

    @Override
    public void updateDrawState(TextPaint paint) {
        paint.setStyle(Paint.Style.FILL);
        Shader shader = new LinearGradient(
                0, 0, 0,
                paint.getTextSize() * colors.length,
                colors, null,
                Shader.TileMode.MIRROR);
        Matrix matrix = new Matrix();
        matrix.setRotate(90);
        shader.setLocalMatrix(matrix);
        paint.setShader(shader);
    }
}

Android xml rectangle border

Simple xml code for rectangle border with transparent background:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <corners
        android:radius="2dp" />
    <stroke
        android:width="2px"
        android:color="@color/white" />
</shape>

Android xml drop shadow

Simple xml code for shape drop shadow:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" 
       android:shape="rectangle">

    <gradient android:startColor="@android:color/transparent"
              android:endColor="#88333333"
              android:angle="90"/>

</shape>

Raspberry Pi – what Raspberry Pi I have?

All You need is to call in terminal this:

grep Revision /proc/cpuinfo

After You get something like this:

Revision : a22082

Go to page https://www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md

and search it in text.

Below is a list of information dated as of 08/02/2019 :

Code	Model	Revision	RAM	Manufacturer
900021	A+	1.1	512 MB	Sony UK
900032	B+	1.2	512 MB	Sony UK
900092	Zero	1.2	512 MB	Sony UK
900093	Zero	1.3	512 MB	Sony UK
9000c1	Zero W	1.1	512 MB	Sony UK
9020e0	3A+	1.0	512 MB	Sony UK
920092	Zero	1.2	512 MB	Embest
920093	Zero	1.3	512 MB	Embest
a01040	2B	1.0	1 GB	Sony UK
a01041	2B	1.1	1 GB	Sony UK
a02082	3B	1.2	1 GB	Sony UK
a020a0	CM3	1.0	1 GB	Sony UK
a020d3	3B+	1.3	1 GB	Sony UK
a21041	2B	1.1	1 GB	Embest
a22042	2B (with BCM2837)	1.2	1 GB	Embest
a22082	3B	1.2	1 GB	Embest
a220a0	CM3	1.0	1 GB	Embest
a32082	3B	1.2	1 GB	Sony Japan
a52082	3B	1.2	1 GB	Stadium
a02100	CM3+	1.0	1 GB	Sony UK

How to change emulator’s RAM and VH heap (for AVD Manager, for Android Studio)

The solution is easy. All You need is to locate AVD directory and modify params in config.ini file.
Mostly it is located in

%UserProfile%\.android\avd\{AVD name}\config.ini

Notepad++ with Material Black Theme

Go to %AppData%\Notepad++\themes
Place Material-Black.xml inside that folder
Restart Notepad++
Dracula will be available in Settings > Style Configurator

Download file Material-Black.xml