Andrid 簡易實現畫面隨意移動并顯示坐標。
本文通過FrameLayout和LinearLayout來布局，并通過捕捉onTouchEvent事件來實現畫面的隨意移動，并同時顯示移動后畫面坐標。
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="當前坐標："/>
<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代碼，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;
}
}