对Android提供的基本布局控件进行组合,可以实现一些相对复杂的效果,下面需要实现的效果如图:
header效果:
header.xml文件:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" android:background="@android:drawable/title_bar">
<Button
android:id="@+id/header_button_left"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:background="@android:drawable/ic_media_rew" />
<Button
android:id="@+id/header_button_right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:background="@android:drawable/ic_media_ff" />
<TextView
android:id="@+id/header_text_center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/button1"
android:layout_centerInParent="true"
android:text="文本信息"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout>
footer效果:
footer.xml文件:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" android:background="@android:drawable/title_bar">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="fill_parent" android:layout_weight="1" android:gravity="center">
<Button
android:id="@+id/footer_a"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@android:drawable/alert_light_frame"
android:text="A" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:orientation="vertical" android:layout_weight="1" android:gravity="center">
<Button
android:id="@+id/footer_b"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@android:drawable/alert_light_frame"
android:text="B" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:orientation="vertical" android:layout_weight="1" android:gravity="center">
<Button
android:id="@+id/footer_c"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@android:drawable/alert_light_frame"
android:text="C" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:orientation="vertical" android:layout_weight="1" android:gravity="center">
<Button
android:id="@+id/footer_d"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@android:drawable/alert_light_frame"
android:text="D" />
</LinearLayout>
</LinearLayout>
activity_include.xml文件:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" android:background="#cccccc">
<LinearLayout
android:id="@+id/top"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true" >
<include layout="@layout/header" />
</LinearLayout>
<LinearLayout
android:id="@+id/middle"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/top" android:layout_above="@+id/bottom">
</LinearLayout>
<LinearLayout
android:id="@+id/bottom"
android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_alignParentBottom="true">
<include layout="@layout/footer" />
</LinearLayout>
</RelativeLayout>
说明:
- RelativeLayout内部分成top,middle,bottom三个LinearLayout,分别用于添加header,自定义布局,footer;
- top填充顶部,bottom填充底部,middle填充剩余区域;
- include标签导入外部layout文件;
下面是4个测试Activity的布局文件,基本类似,中间区域放置一个按钮,代码如下activity_a.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center" >
<Button
android:id="@+id/activity_a_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="A" />
</LinearLayout>
剩下的activity_b.xml,activity_c.xml,activity_d.xml就不一一贴出了!:)
AActivity的代码如下:
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Toast;
public class AActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_a);
findViewById(R.id.activity_a_button).setOnClickListener(
new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(AActivity.this, "This is activity a!", Toast.LENGTH_SHORT).show();
}
});
}
}
说明:
- 当点击按钮后,显示当前Activity信息;
- 其它BActivity,CActivity,DActivity代码类似,不一一贴出了!:)
看看IncludeActivity的主要代码:
import android.app.ActivityGroup;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
public class IncludeActivity extends ActivityGroup implements OnClickListener {
// Header
private Button leftButtonHeader;
private Button rightButtonHeader;
private TextView centerTextHeader;
// Footer
private Button aButtonFooter;
private Button bButtonFooter;
private Button cButtonFooter;
private Button dButtonFooter;
private LinearLayout middleLayout;
private View middleView;
private LayoutParams layoutParams;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_include);
setTitle("测试");
// 获得Header部分的View引用
leftButtonHeader = (Button) findViewById(R.id.header_button_left);
rightButtonHeader = (Button) findViewById(R.id.header_button_right);
centerTextHeader = (TextView) findViewById(R.id.header_text_center);
// 获得Footer部分的View引用
aButtonFooter = (Button) findViewById(R.id.footer_a);
bButtonFooter = (Button) findViewById(R.id.footer_b);
cButtonFooter = (Button) findViewById(R.id.footer_c);
dButtonFooter = (Button) findViewById(R.id.footer_d);
// 设置点击事件监听器
leftButtonHeader.setOnClickListener(this);
rightButtonHeader.setOnClickListener(this);
aButtonFooter.setOnClickListener(this);
bButtonFooter.setOnClickListener(this);
cButtonFooter.setOnClickListener(this);
dButtonFooter.setOnClickListener(this);
layoutParams = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
// 获得自定义View的父容器
middleLayout = (LinearLayout) findViewById(R.id.middle);
// 获得自定义View,并添加到当前布局
middleView = getLocalActivityManager().startActivity(null, new Intent(this, AActivity.class)).getDecorView();
middleLayout.addView(middleView, layoutParams);
}
@Override
public void onClick(View v)getLocalActivityManager {
switch (v.getId()) {
case R.id.header_button_left:
Toast.makeText(this, "左", Toast.LENGTH_SHORT).show();
break;
case R.id.header_button_right:
Toast.makeText(this, "右", Toast.LENGTH_SHORT).show();
break;
case R.id.footer_a:
Toast.makeText(this, "A", Toast.LENGTH_SHORT).show();
middleLayout.removeAllViews();
middleView = getLocalActivityManager().startActivity(null, new Intent(this, AActivity.class)).getDecorView();
middleLayout.addView(middleView, layoutParams);
break;
case R.id.footer_b:
Toast.makeText(this, "B", Toast.LENGTH_SHORT).show();
middleLayout.removeAllViews();
middleView = getLocalActivityManager().startActivity(null, new Intent(this, BActivity.class)).getDecorView();
middleLayout.addView(middleView, layoutParams);
break;
case R.id.footer_c:
Toast.makeText(this, "C", Toast.LENGTH_SHORT).show();
middleLayout.removeAllViews();
middleView = getLocalActivityManager().startActivity(null, new Intent(this, CActivity.class)).getDecorView();
middleLayout.addView(middleView, layoutParams);
break;
case R.id.footer_d:
Toast.makeText(this, "D", Toast.LENGTH_SHORT).show();
middleLayout.removeAllViews();
middleView = getLocalActivityManager().startActivity(null, new Intent(this, DActivity.class)).getDecorView();
middleLayout.addView(middleView, layoutParams);
break;
default:
break;
}
}
}
说明:
- middleLayout在重新添加View的时候,要先清除已有View,即:middleLayout.removeAllViews();
- 通过getLocalActivityManager获得LocalActivityManager,然后在获得某个Activity对应的View,并添加到当前布局中;
- 虽然AActivit的UI在IncludeActivity中显示,但是有关AActivity的UI操作和逻辑代码只要在AActivity中进行编写就可以了;
- manifest文件中添加相关Activity的声明;
- 关于添加其它Activity的UI到当前Activity的代码没有做性能测试,可能需要做调整,包括连续点击A,B,C,D按钮时,控制View是否添加等;
其它效果图片:
多说一句:主要内容是布局效果处理和ActivityGroup使用!:)记录点点滴滴,以备不时之需!=^_^=