Andrid 简易实现画面随意移动并显示坐标。

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;      } }