我的图像比实际屏幕大。我有拖放的代码...一切正常,但是当我拖动图像时,问题可能出在屏幕/视图之外。我想将其设置为角落,而不是外面...当图像角落/侧面=屏幕侧面时停止...有人可以帮忙吗?我想映射到我的游戏...如果您测试代码,您将确切地看到问题所在。
基数:https://i.imgur.com/G4BtCmS.jpg
问题:https://i.imgur.com/xi9x2nE.jpg
当图像拖动=屏幕角...所有位置...左,顶部等...时,我想拖动停止:https://i.imgur.com/k6I7A7d.jpg
但是我这个代码,我可以拖出屏幕。...:https://i.imgur.com/xi9x2nE.jpg 有人可以帮忙吗?如何设置拖放边界?谢谢
代码: activity_main.xml
enter code here
<?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">
<ImageView
android:id="@+id/image"
android:layout_width="4000dp"
android:layout_height="2000dp"
android:background="@drawable/bgtest"
android:layout_marginBottom="-1000dp"
android:layout_marginStart="-2000dp"
android:layout_marginTop="-500dp"/>
</RelativeLayout>
MainActivity.java
enter code here
package com.example.backgroundtest;
import android.annotation.SuppressLint;
import android.graphics.PointF;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
ImageView image;
PointF DownPT = new PointF();
PointF StartPT = new PointF();
@SuppressLint("ClickableViewAccessibility")
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
image = (ImageView)findViewById(R.id.image);
image.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
int eid = event.getAction();
switch (eid)
{
case MotionEvent.ACTION_MOVE :
PointF mv = new PointF( event.getX() - DownPT.x, event.getY() - DownPT.y);
image.setX((int)StartPT.x+mv.x);
image.setY((int)StartPT.y+mv.y);
StartPT = new PointF( image.getX(), image.getY());
break;
case MotionEvent.ACTION_DOWN :
DownPT.x = event.getX();
DownPT.y = event.getY();
StartPT = new PointF( image.getX(), image.getY());
break;
case MotionEvent.ACTION_UP :
break;
default:
break;
}
return true;
}
});
}
}