利用半透明對話框實現新浪微博android客戶端首次運行時的提示界面

One.首先，設置要覆蓋在最上方的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.而後，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.繼續添加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文件夾下，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.最後，在要彈出對話框的地方添加以下代碼：

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() {
6. @Override
7. public void onClick(View v) {
8. dialog.dismiss();
9. }
10. });
11. dialog.show();

 最