短视频源码，每日任务通过刮卡的方式选择

短视频源码，每日任务通过刮卡的方式选择，刮卡动画实现的相关代码

activity_main.xml

<br><?xml version="1.0" encoding="utf-8"?><br><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"<br>xmlns:app="http://schemas.android.com/apk/res-auto"<br>xmlns:tools="http://schemas.android.com/tools"<br>android:layout_width="match_parent"<br>android:layout_height="match_parent"<br>android:background="@drawable/bk"<br>tools:context=".MainActivity"><br>    <ImageView<br>        android:id="@+id/bg"<br>        android:layout_width="match_parent"<br>        android:layout_height="match_parent"<br>        android:background="@drawable/bg"/><br>    <ImageView<br>        android:id="@+id/imgv"<br>        android:layout_width="match_parent"<br>        android:layout_height="match_parent"<br>        android:scaleType="centerCrop"<br>        android:src="@drawable/scratch_card"/><br></RelativeLayout>

MainActivity.java

<br>package com.example.service;<br>import androidx.appcompat.app.AppCompatActivity;<br>import android.graphics.Bitmap;<br>import android.graphics.BitmapFactory;<br>import android.graphics.Canvas;<br>import android.graphics.Color;<br>import android.graphics.Matrix;<br>import android.graphics.Paint;<br>import android.text.Html;<br>import android.util.DisplayMetrics;<br>import android.view.Display;<br>import android.view.MotionEvent;<br>import android.view.View;<br>import android.view.ViewGroup;<br>import android.widget.BaseAdapter;<br>import android.widget.CalendarView;<br>import android.widget.LinearLayout;<br>import android.widget.ListView;<br>import android.widget.TextView;<br>import android.widget.Toast;<br>import android.widget.ImageView;<br>import android.os.Bundle;<br>public class MainActivity extends AppCompatActivity {<br>    private ImageView imageView;<br>    private Bitmap alterBitmap;<br>    private double nX,nY;<br>    @Override<br>    protected void onCreate(Bundle savedInstanceState) {<br>        super.onCreate(savedInstanceState);<br>        setContentView(R.layout.activity_main);<br>        imageView=(ImageView) findViewById(R.id.imgv);<br>        Bitmap bitmap= BitmapFactory.decodeResource(getResources(),R.drawable.scratch_card);<br>        alterBitmap=Bitmap.createBitmap(bitmap.getWidth(),bitmap.getHeight(),bitmap.getConfig());<br>        DisplayMetrics dm=new DisplayMetrics();<br>        getWindowManager().getDefaultDisplay().getMetrics(dm);<br>        nX=(double) bitmap.getWidth()/dm.widthPixels;<br>        nY=(double) bitmap.getHeight()/dm.heightPixels;<br>        Canvas canvas=new Canvas(alterBitmap);<br>        Paint paint=new Paint();<br>        paint.setColor(Color.BLACK);<br>        paint.setAntiAlias(true);<br>        Matrix matrix=new Matrix();<br>        canvas.drawBitmap(bitmap,matrix,paint);<br>        imageView.setOnTouchListener(new View.OnTouchListener() {<br>            @Override<br>            public boolean onTouch(View v, MotionEvent event) {<br>                try{<br>                    int x=(int) event.getX();<br>                    int y=(int) event.getY();<br>                    for(int i=-100;i<100;i++){<br>                        for(int j=-100;i<100;i++){<br>                            if(Math.sqrt((i*i)+(j*j))<=100){<br>                                alterBitmap.setPixel((int)(x*nX)+i,(int)(y*nY+90)+j,Color.TRANSPARENT);<br>                            }<br>                        }<br>                    }<br>                    imageView.setImageBitmap(alterBitmap);<br>                }catch (Exception e){<br>                    e.printStackTrace();<br>                }<br>                return true;<br>            }<br>        });<br>    }<br>}