Question

我试图找到与众不同的游戏应用程序，但是我从来没有做过这样的事情，因为我是开发的新手，所以我陷入了困境

宝贝总是需要学习xD的步骤

我在一些文档中读到，我必须分别获取每个ImageView的高度和宽度，因此当我触摸imageView1时，其坐标可以设置为ImageVIew2和ViceVersa，我可能会错XD

现在我有一个垂直放置2张图像的布局

<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=".PlayActivity"
android:id="@+id/hello1">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:id="@+id/hello">

    <ImageView
        android:id="@+id/image1"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="@drawable/pic_9" />

    <ImageView
        android:id="@+id/image2"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="@drawable/pic_9a" />

</LinearLayout>

我想做的是，如果我点击image1中的一个位置，则应该在image2中的同一位置上创建一个圆圈

在阅读了几样东西之后，如果我点击布局，我就圈了一个圈，但是在这之后我被卡住了，我找不到下一步该怎么做，也许我找不到与我的问题有关的文档

public class PlayActivity extends AppCompatActivity {

RelativeLayout layout;
float x = 0;
float y = 0;

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

    layout=(RelativeLayout) findViewById(R.id.hello1);
    layout.addView(new CustomView(PlayActivity.this));

}

public class CustomView extends View {

    Bitmap mBitmap;
    Paint paint;

    public CustomView(Context context) {
        super(context);
        mBitmap = Bitmap.createBitmap(400, 800, Bitmap.Config.ARGB_8888);
        paint = new Paint();
        paint.setColor(Color.RED);
        paint.setStyle(Paint.Style.FILL);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawCircle(x, y, 50, paint);
    }

    public boolean onTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_DOWN) {
            x = event.getX();
            y = event.getY();
            invalidate();
        }
        return false;
    }
}}

现在我认为我的两个ImageView arent是分开的，因为当我在两个图像之间触摸时会创建一个圆圈，这不应该是因为imageView1结束时无法确定我是否在正确的方向思考，这只是我对应该如何做的猜测它可以使游戏正常工作，我可能会错XD

我还有很长的路要走，但是我被困在这里
有人可以帮忙吗？

我使用Tejas Pandya替换了PlayActivity代码

RelativeLayout layout;
float x = 0;
float y = 0;
ImageView ImageView1, ImageView2;

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

    layout=(RelativeLayout) findViewById(R.id.hello1);
    layout.addView(new CustomView(PlayActivity.this));

    ImageView1 = (ImageView) findViewById(R.id.image1);
    ImageView2 = (ImageView) findViewById(R.id.image2);

}

public class CustomView extends View {


    public CustomView(Context context) {
        super(context);
    }

    public boolean onTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_DOWN) {
            x = event.getX();
            y = event.getY();
            invalidate();
            drawCircle(R.id.image2,ImageView2,x,y);
        }
        return false;
    }

    public void drawCircle(int my_image_id, ImageView my_imageview, float x , float y){

        BitmapFactory.Options myOptions = new BitmapFactory.Options();
        myOptions.inDither = true;
        myOptions.inScaled = false;
        myOptions.inPreferredConfig = Bitmap.Config.ARGB_8888;// important
        myOptions.inPurgeable = true;

        Bitmap bitmap = BitmapFactory.decodeResource(getResources(), my_image_id,myOptions);
        Paint paint = new Paint();
        paint.setAntiAlias(true);
        paint.setColor(Color.BLUE);


        Bitmap workingBitmap = Bitmap.createBitmap(bitmap);
        Bitmap mutableBitmap = workingBitmap.copy(Bitmap.Config.ARGB_8888, true);


        Canvas canvas = new Canvas(mutableBitmap);
        canvas.drawCircle(x, y, 25, paint);


        my_imageview.setAdjustViewBounds(true);
        my_imageview.setImageBitmap(mutableBitmap);

    }
}

我收到此错误

E / MessageQueue-JNI：java.lang.NullPointerException：尝试在空对象引用上调用虚拟方法'int android.graphics.Bitmap.getWidth（）' 在android.graphics.Bitmap.createBitmap（Bitmap.java:742）在com.example.pc.blazedifferencegame.PlayActivity $ CustomView.drawCircle（PlayActivity.java:68）在com.example.pc.blazedifferencegame.PlayActivity $ CustomView.onTouchEvent（PlayActivity.java:49）

Answer 1

当您在Image上录音时。您将在

中获得x，y坐标

 x = event.getX();
 y = event.getY();

现在您有了x，y坐标。使用相同的x，y坐标在两个imageview上调用drawCircle()方法。

对于绘图圆：

执行一个功能drawCircle();

public void drawCircle(int my_image_id,Imageview my_imageview,int x ,int y){

   BitmapFactory.Options myOptions = new BitmapFactory.Options();
    myOptions.inDither = true;
    myOptions.inScaled = false;
    myOptions.inPreferredConfig = Bitmap.Config.ARGB_8888;// important
    myOptions.inPurgeable = true;

    Bitmap bitmap = BitmapFactory.decodeResource(getResources(), my_image_id,myOptions);
    Paint paint = new Paint();
    paint.setAntiAlias(true);
    paint.setColor(Color.BLUE);


   //please check here . you've got your bitmap or it is null.
  // if it is null,there might be some problem with decoding your resources above.
    Bitmap workingBitmap = Bitmap.createBitmap(bitmap);
    Bitmap mutableBitmap = workingBitmap.copy(Bitmap.Config.ARGB_8888, true);


    Canvas canvas = new Canvas(mutableBitmap);
    canvas.drawCircle(x, y, 25, paint);


    my_imageview.setAdjustViewBounds(true);
    my_imageview.setImageBitmap(mutableBitmap);

}

现在图片1。使用drawCircle(R.id.imageview1,imageview,x,y)并用于图片2。使用drawCircle(R.id.imageview2,imageview2,x,y)

如果我在ImageView1中点击一个位置，则在ImageView2上以与ImageView1相同的坐标绘制一个圆，反之亦然

1 个答案: