Új hozzászólás Aktív témák

• #5355 domel tag

  Új Válasz 2021-12-25 22:27:01 #5355

  Új hozzászólás

  Összes hozzászólása itt Válaszok az összes hozzászólására itt Válaszok erre a hozzászólásra

  Privát üzenet küldése

  

  domel

  tag

  Egy kis érdekesség karácsonyra.
  MatrixEffect.java
  package hun.domel.maxrict;

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

import java.util.Random;

public class MatrixEffect extends View {

private static final Random RANDOM = new Random();
private int width, height;
private Canvas canvas;
private Bitmap canvasBmp;
private int fontSize = 35;
private int columnSize;
private char[] cars = "+-*/!^'([])#@&?,=$€°|%".toCharArray();
private int[] txtPosByColumn;
private Paint paintTxt, paintBg, paintBgBmp, paintInitBg;

public MatrixEffect(Context context, AttributeSet attrs) {
super(context, attrs);
paintTxt = new Paint();
paintTxt.setStyle(Paint.Style.FILL);
paintTxt.setColor(Color.GREEN);
paintTxt.setTextSize(fontSize);

paintBg = new Paint();
paintBg.setColor(Color.BLACK);
paintBg.setAlpha(5);
paintBg.setStyle(Paint.Style.FILL);

paintBgBmp = new Paint();
paintBgBmp.setColor(Color.BLACK);

paintInitBg = new Paint();
paintInitBg.setColor(Color.BLACK);
paintInitBg.setAlpha(255);
paintInitBg.setStyle(Paint.Style.FILL);
}

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
width = w;
height = h;
canvasBmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
canvas = new Canvas(canvasBmp);
canvas.drawRect(0, 0, width, height, paintInitBg);
columnSize = width / fontSize;
txtPosByColumn = new int[columnSize + 1];
for (int x = 0; x < columnSize; x++) {
txtPosByColumn[x] = RANDOM.nextInt(height / 2) + 1;
}
}

private void drawText() {
for (int i = 0; i < txtPosByColumn.length; i++) {
canvas.drawText("" + cars[RANDOM.nextInt(cars.length)], i * fontSize, txtPosByColumn[i] * fontSize, paintTxt);
if (txtPosByColumn[i] * fontSize > height && Math.random() > 0.975) {
txtPosByColumn[i] = 0;
}
txtPosByColumn[i]++;
}
}

private void drawCanvas() {
canvas.drawRect(0, 0, width, height, paintBg);
drawText();
}

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawBitmap(canvasBmp, 0, 0, paintBgBmp);
drawCanvas();
invalidate();
}
}

  activity_main.xml
  <?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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">

<hun.domel.maxrict.MatrixEffect
android:layout_width="match_parent"
android:layout_height="match_parent" />

<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="128dp"
android:layout_marginTop="160dp"
android:text="Button"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />


</androidx.constraintlayout.widget.ConstraintLayout>
  A package name-t mindkét helyen javítsd a sajátodra, a MainActivity.java-hoz nem kell nyúlni

Új hozzászólás Aktív témák