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

Connect Huawei device over wifi with adb

We need:

Device’s name and ip
1. My target’s name: EHT0220B19001804
2. My target’s ip: 192.168.0.249
Enabled USB Debugging and checked Allow ADB debugging in charge only mode.

Then we call:

> adb devices   

List of devices attached
EHT0220B19001804	device << TARGET
192.168.0.38:5555	device

> adb -s EHT0220B19001804 tcpip 5555

> adb connect 192.168.0.249:5555

> adb -s 192.168.0.249:5555 shell

Now you can safely disconnect the cable and try write down the command:

adb -s 192.168.0.249:5555 shell

If you will see something like this below it means it works!

HWVOG:/ $

ObjectAnimator change text color with repeat and reverse

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // ...

        TextView notPaidText = findViewById(R.id.not_paid);
        ObjectAnimator colorAnim = ObjectAnimator.ofInt(
                notPaidText,
                "textColor",
                Color.parseColor("#50ff0000"),
                Color.parseColor("#00ffffff")
        );
        colorAnim.setEvaluator(new ArgbEvaluator());
        colorAnim.setDuration(10000);
        TimeInterpolator baseInterpolator = colorAnim.getInterpolator();
        colorAnim.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                if (animation.getInterpolator() instanceof AccelerateDecelerateInterpolator) {
                    animation.setInterpolator(new ReverseInterpolator());
                } else {
                    animation.setInterpolator(baseInterpolator);
                }
                animation.start();
            }
        });
        colorAnim.start();
    }

    public class ReverseInterpolator implements Interpolator {

        private final Interpolator delegate;

        public ReverseInterpolator(Interpolator delegate) {
            this.delegate = delegate;
        }

        public ReverseInterpolator() {
            this(new LinearInterpolator());
        }

        @Override
        public float getInterpolation(float input) {
            return 1 - delegate.getInterpolation(input);
        }
    }
}

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