利用半透明对话框实现新浪微博android客户端首次运行时的提示界面

One.首先，设置要覆盖在最上方的dialog的view

1. <?xml version="1.0" encoding="utf-8"?>

2. <RelativeLayout android:background="@drawable/navigater_bg" android:padding="0.0dip"android:layout_width="fill_parent" android:layout_height="fill_parent"

3. xmlns:android="http://schemas.android.com/apk/res/android">

4. <ImageView android:id="@id/ivNavigater_top" android:layout_width="wrap_content"android:layout_height="wrap_content" android:src="@drawable/navigater_top"android:layout_alignParentTop="true" android:layout_centerHorizontal="true" />

5. <ImageView android:id="@id/ivNavigater_center" android:layout_width="wrap_content"android:layout_height="wrap_content" android:src="@drawable/navigater_center"android:layout_centerInParent="true" />

6. <ImageView android:id="@id/ivNavigater_clickable" android:padding="0.0dip"android:layout_width="wrap_content" android:layout_height="wrap_content"android:layout_margin="0.0dip" android:src="@drawable/navigater_clickable"android:layout_alignParentRight="true" android:layout_alignParentBottom="true" />

7. <ImageView android:id="@id/ivNavigater_bottom" android:layout_width="wrap_content"android:layout_height="wrap_content" android:layout_margin="0.0dip"android:src="@drawable/navigater_bottom" android:adjustViewBounds="true"android:layout_alignParentLeft="true" android:layout_alignParentBottom="true" />

8. </RelativeLayout>

Two.然后，在values/styles.xml添加style for 半透明：

    <style name="Dialog_Fullscreen">
        <item name="android:windowBackground">@android :color/transparent</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowIsTranslucent">true</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="android:windowAnimationStyle">@style/Dialog_Anim</item>
        <item name="android:colorBackgroundCacheHint">@null</item>
    </style>

Three.继续添加style for 淡入淡出效果：

1. <style name="Dialog_Anim">

2. <item name="android:windowEnterAnimation">@anim/fading_in</item>

3. <item name="android:windowExitAnimation">@anim/fading_out</item>

4. </style>

Four.在anim文件夹下，添加文件fading_in.xml for 淡入

1. <?xml version="1.0" encoding="utf-8"?>

2. <set

3. xmlns:android="http://schemas.android.com/apk/res/android">

4. <alpha android:duration="500" android:fromAlpha="0.1" android:toAlpha="1.0" />

5. </set>

Five.添加文件fading_out.xml for 淡出

1. <?xml version="1.0" encoding="utf-8"?>

2. <set

3. xmlns:android="http://schemas.android.com/apk/res/android">

4. <alpha android:duration="500" android:fromAlpha="0.1" android:toAlpha="1.0" />

5. </set>

 

Six.最后，在要弹出对话框的地方添加如下代码：

1. Dialog dialog = new Dialog(this, R.style.Dialog_Fullscreen);

2. dialog.setContentView(R.layout.sina);

3. ImageView iv = (ImageView)dialog.findViewById(R.id.ivNavigater_clickable);

4. iv.setOnClickListener(new OnClickListener() {

5. 
   

6. @Override

7. public void onClick(View v) {

8. dialog.dismiss();

9. }

10. });

11. dialog.show();