新版Android开发教程笔记基础UI编程4

-----------------------------------Android编程基础
android:id="@+id/myButton1"
android:layout_width="105px"
android:layout_height="66px"
mImageView01.setImageDrawable(getResources().getDrawable(
R.drawable.right));
}
});
new
pprriivvaattee Button mButton02;
@Override
public void
public void
ppuubblliicc vvooiidd onCreate(Bundle savedInstanceState) {
③ 修改main.xml布局，添加UI元素
<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
android:id="@+id/widget34"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="/apk/res/android"
><!--创建第一个ImageView (第二层图片)-->
<ImageView
android:id="@+id/myImageView1"
R.drawable.right));
3
----------------------- Page 4-----------------------
/** Called when the activity is first created. */
/* 声明Button、ImageView 对象*/
private
private
pprriivvaattee ImageView mImageView01;
AAnnddrrooiidd 基础UUII编程44
专业相框设计
ImageView 的堆叠应用
① 新建工程
② 准备三张png图片
left.png right.png photo.png
@Override
public void
public void
ppuubblliicc vvooiidd onClick(View v) {
/* 当启动后，ImageView 立刻换背景图*/
import
import
iimmppoorrtt android.widget.ImageView;
public class extends
public class extends
ppuubblliicc ccllaassss Ex_Ctrl_7 eexxtteennddss Activity {
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="0px"
android:layout_y="36px"
/>
<!--创建第二个ImageView (第一层图片)-->
R.drawable.left));
}
});
}
}
⑤ 结果
4
android:text="pic1"
android:layout_x="9px"
android:layout_y="356px"
/>
<!--创建第二个Button -->
<Button
android:id="@+id/myButton2"
<ImageView
android:id="@+id/myImageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="0px"
-----------------------------------Android编程基础
mImageView02.setImageDrawable(getResources().getDrawable(
R.drawable.photo));
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-----------------------------------Android编程基础
封面
1
android:layout_y="36px"
/>
<!--创建第一个Button -->
<Button
2
----------------------- Page 3-----------------------
left.png right.png photo.png
super
super
ssuuppeerr.onCreate(savedInstanceState);
setContentView(yout.main);
/* 取得Button、ImageView 对象*/
mButton02 = (Button) findViewById(R.id.myButton2);
/* 设置ImageView 背景图*/
mImageView01.setImageDrawable(getResources().getDrawable(
/>
</AbsoluteLayout>
④ 修改mainActppaacckkaaggee zyf.Ex_Ctrl_7;
import
import
iimmppoorrtt android.app.Activity;
new
mButton02.setOnClickListener(nneeww Button.OnClickListener() {
@Override
public void
mImageView01 = (ImageView) findViewById(R.id.myImageView1);
mImageView02 = (ImageView) findViewById(R.id.myImageView2);
mButton01 = (Button) findViewById(R.id.myButton1);
import
import
iimmppoorrtt android.os.Bundle;
import
import
iimmppoorrtt android.view.View;
import
import
iimmppoorrtt android.widget.Button;
/* 用OnClickListener 事件来启动*/
new
new
mButton01.setOnClickListener(nneeww Button.OnClickListener() {
android:layout_width="105px"
android:layout_height="66px"
android:text="pic2"
android:layout_x="179px"
android:layout_y="356px"
----------------------- Page 2-----------------------
-----------------------------------Android编程基础
Android UI 4
Android UI 4
private
private
pprriivvaattee ImageView mImageView02;
private
private
pprriivvaattee Button mButton01;
private
private
public void
ppuubblliicc vvooiidd onClick(View v) {
mImageView01.setImageDrawable(getResources().getDrawable(
----------------------- Page 5-----------------------
-----------------------------------Android编程基础
ImageButton的堆叠应用
① 新建项目
② 准备三张png图片