android - 安卓上的图像映射

Question

您好，我正在尝试在图像上制作热点，但问题是当屏幕尺寸发生变化时，热点位置也会发生变化

I have done following things as of now

Bellow is my layout file

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="myapp.imagemappingdemo.MainActivity">
<FrameLayout
    android:layout_width="7000pt"
    android:layout_height="5000pt">
    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/bolt_int"
        android:text="Hello World!" />
    <RelativeLayout
        android:id="@+id/upperView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@android:color/transparent"
        >
    </RelativeLayout>
</FrameLayout>

I am using following code to plot the image.

    screenWidth = this.getResources().getDisplayMetrics().widthPixels;
    ImageView btn = new ImageView(MainActivity.this);
    RelativeLayout.LayoutParams bp = new    RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    bp.leftMargin = (int) (774.6667 );
    bp.topMargin = (int) (413.25);
    btn.setLayoutParams(bp);
    btn.setImageResource(R.drawable.ic_stat_name);
    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Toast.makeText(MainActivity.this, "Button Click", Toast.LENGTH_LONG).show();
        }
    });
    upperview.addView(btn, bp);

我想弄清楚我将如何通过使用相同的 (X,Y) 坐标来计算不同屏幕上的精确位置，任何人都可以帮助我这样做屏幕高度和宽度之间的关系是什么(X , y) 坐标与屏幕尺寸无关

Answer 1

如果您的以下代码适用于特定屏幕，

bp.leftMargin = (int) (774.6667 );
bp.topMargin = (int) (413.25);

然后只需根据屏幕高度和宽度更改值，假设它适用于 800 x 480 -

int standardWidth = 480;
int standardHeight = 800;
bp.leftMargin = ((int) (774.6667 ) * dm.widthPixel)/standardWidth;
bp.topMargin = ((int) (413.25) * dm.heightPixel)/standardHeight;

现在 leftMargin 和 topMargin 将根据屏幕尺寸更新。

希望对你有帮助:)