1-) Android RMOS - resim çizmek imza atmak Capture SignatureView

kaynak : https://stackoverflow.com/questions/7228191/android-signature-capture

1-) Android RMOS - CaptureSignatureView.java

package com.rambo.imza;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;

import java.io.ByteArrayOutputStream;

public class CaptureSignatureView extends View {

    private Bitmap _Bitmap;
    private Canvas _Canvas;
    private Path _Path;
    private Paint _BitmapPaint;
    private Paint _paint;
    private float _mX;
    private float _mY;
    private float TouchTolerance = 4;
    private float LineThickness = 4;

    public CaptureSignatureView(Context context, AttributeSet attr) {
        super(context, attr);
        _Path = new Path();
        _BitmapPaint = new Paint(Paint.DITHER_FLAG);
        _paint = new Paint();
        _paint.setAntiAlias(true);
        _paint.setDither(true);
        _paint.setColor(Color.argb(255, 0, 0, 0));
        _paint.setStyle(Paint.Style.STROKE);
        _paint.setStrokeJoin(Paint.Join.ROUND);
        _paint.setStrokeCap(Paint.Cap.ROUND);
        _paint.setStrokeWidth(LineThickness);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        _Bitmap = Bitmap.createBitmap(w, (h > 0 ? h : ((View) this.getParent()).getHeight()), Bitmap.Config.ARGB_8888);
        _Canvas = new Canvas(_Bitmap);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawColor(Color.WHITE);
        canvas.drawBitmap(_Bitmap, 0, 0, _BitmapPaint);
        canvas.drawPath(_Path, _paint);
    }

    private void TouchStart(float x, float y) {
        _Path.reset();
        _Path.moveTo(x, y);
        _mX = x;
        _mY = y;
    }

    private void TouchMove(float x, float y) {
        float dx = Math.abs(x - _mX);
        float dy = Math.abs(y - _mY);

        if (dx >= TouchTolerance || dy >= TouchTolerance) {
            _Path.quadTo(_mX, _mY, (x + _mX) / 2, (y + _mY) / 2);
            _mX = x;
            _mY = y;
        }
    }

    private void TouchUp() {
        if (!_Path.isEmpty()) {
            _Path.lineTo(_mX, _mY);
            _Canvas.drawPath(_Path, _paint);
        } else {
            _Canvas.drawPoint(_mX, _mY, _paint);
        }

        _Path.reset();
    }

    @Override
    public boolean onTouchEvent(MotionEvent e) {
        super.onTouchEvent(e);
        float x = e.getX();
        float y = e.getY();

        switch (e.getAction()) {
            case MotionEvent.ACTION_DOWN:
                TouchStart(x, y);
                invalidate();
                break;
            case MotionEvent.ACTION_MOVE:
                TouchMove(x, y);
                invalidate();
                break;
            case MotionEvent.ACTION_UP:
                TouchUp();
                invalidate();
                break;
        }

        return true;
    }

    public void ClearCanvas() {
        _Canvas.drawColor(Color.WHITE);
        invalidate();
    }

    public byte[] getBytes() {
        Bitmap b = getBitmap();

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        b.compress(Bitmap.CompressFormat.PNG, 100, baos);
        return baos.toByteArray();
    }

    public Bitmap getBitmap() {
        View v = (View) this.getParent();
        Bitmap b = Bitmap.createBitmap(v.getWidth(), v.getHeight(), Bitmap.Config.ARGB_8888);
        Canvas c = new Canvas(b);
        v.layout(v.getLeft(), v.getTop(), v.getRight(), v.getBottom());
        v.draw(c);

        return b;
    }
}

2-) MainActivity.java

package com.rambo.imza;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    // kaynak : https://stackoverflow.com/questions/7228191/android-signature-capture

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // cizz
        LinearLayout mContent = (LinearLayout) findViewById(R.id.cizz);
       final CaptureSignatureView mSig =new CaptureSignatureView(this, null);
        mContent.addView(mSig, LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT);
        Button btnGonder = (Button) findViewById(R.id.btnGonder);
        Button btnTemizle = (Button) findViewById(R.id.btnTemizle);
        btnGonder.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                byte[] signature = mSig.getBytes();
                //Bitmap signature = mSig.getBitmap();

                Toast.makeText(MainActivity.this, "Gönderildi", Toast.LENGTH_SHORT).show();
            }
        });
        btnTemizle.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mSig.ClearCanvas();
                Toast.makeText(MainActivity.this, "Temizlendi", Toast.LENGTH_SHORT).show();
            }
        });
    }
}

3-)  activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:weightSum="100">

        <LinearLayout
            android:id="@+id/cizz"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="50"
            android:orientation="horizontal">

        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_margin="10dp"
            android:layout_weight="50"
            android:orientation="horizontal">

            <Button
                android:id="@+id/btnTemizle"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginRight="10dp"
                android:layout_weight="1"
                android:background="#CDDC39"
                android:text="TEMİZLE" />

            <Button
                android:id="@+id/btnGonder"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:background="#CDDC39"
                android:text="GÖNDER" />
        </LinearLayout>
    </LinearLayout>

</RelativeLayout>