Andrid 简易实现画面随意移动并显示坐标。

openkk 12年前

本文通过FrameLayout和LinearLayout来布局，并通过捕捉onTouchEvent事件来实现画面的随意移动，并同时显示移动后画面坐标。

 

1、先上布局文件：main.xml

    <?xml version="1.0" encoding="utf-8"?>         <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent">             <LinearLayout android:id="@+id/container"                android:layout_width="fill_parent"                android:layout_height="fill_parent"                android:orientation="horizontal">                                <ImageView android:src="@drawable/icon1"                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"/>                                     </LinearLayout>                        <LinearLayout android:id="@+id/showXY"                android:layout_width="fill_parent"                android:layout_height="wrap_content"                android:layout_gravity="bottom"                android:orientation="horizontal">                                <TextView android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:padding="5px"                    android:text="当前坐标："/>                                <TextView android:id="@+id/xyValue"                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:padding="5px"                    android:text="0,0"/>                             </LinearLayout>            </FrameLayout>
2、Activity代码，MainActivity.java：
    package org.shuxiang.test;                import android.app.Activity;        import android.os.Bundle;        import android.view.MotionEvent;        import android.view.Window;        import android.widget.LinearLayout;        import android.widget.TextView;                public class MainActivity extends Activity        {            private LinearLayout container;             private int currentX;             private int currentY;             private TextView xyValue;                    @Override            public void onCreate(Bundle savedInstanceState) {                super.onCreate(savedInstanceState);                requestWindowFeature(Window.FEATURE_NO_TITLE);                setContentView(R.layout.main);                            container = (LinearLayout) findViewById(R.id.container);                xyValue = (TextView) findViewById(R.id.xyValue);                            }                        @Override              public boolean onTouchEvent(MotionEvent event)            {               switch (event.getAction())              {                   case MotionEvent.ACTION_DOWN:                  {                       currentX = (int) event.getRawX();                       currentY = (int) event.getRawY();                       break;                   }                     case MotionEvent.ACTION_MOVE:                  {                       int x2 = (int) event.getRawX();                       int y2 = (int) event.getRawY();                       container.scrollBy(currentX - x2 , currentY - y2);                       currentX = x2;                       currentY = y2;                      xyValue.setText(x2 + "," + y2);                      break;                   }                      case MotionEvent.ACTION_UP:                  {                       break;                   }               }                 return true;              }         }