Android半透明对话框实现

1、定义style:

<resources>

    <style
        name="dialog_fullscreen">
        <item
            name="android:windowFullscreen">true</item>
        <item
            name="android:windowNoTitle">true</item>
        <item
            name="android:windowBackground">@android:color/transparent</item>
    </style>
</resources>

 

2、定义layout文件：test_dialog.xml

<LinearLayout
    android:id="@+id/ll_dialog"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_gravity="center"
    android:background="#000000">

……

</LinearLayout>

 

3、代码中设置：

public class TestDialog extends Dialog

{

    public TestDialog(Context context)
    {
        super(context, R.style.dialog_fullscreen);
        // TODO Auto-generated constructor stub
    }

 

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.test_dialog);

 

        // 设置背景透明度
        View ll = findViewById(R.id.ll_dialog);
        ll.getBackground().setAlpha(120);// 120为透明的比率
    }

}