Android中自定义对话框(Dialog)的实例代码

<style name="Theme.Dialog">
<item name="android:windowFrame">@null</item>
<item name="android:windowTitleStyle">@android:style/DialogWindowTitle</item>
<item name="android:windowBackground">@android:drawable/panel_background</item>
<item name="android:windowIsFloating">true</item>
<item name="android:windowContentOverlay">@null</item>
<item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
<item name="android:windowSoftInputMode">stateUnspecified|adjustPan</item>
</style>

<style name="Theme_dialog" parent="@android:style/Theme.Dialog">
<item name="android:windowBackground">@android:color/transparent</item>
<item name="android:windowNoTitle">true</item>
</style>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/pp_bg_dialog"
android:gravity="center">

<ProgressBar android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="@style/progressbar_normal"/>

<TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
style="@style/text_white_small" android:layout_marginTop="5dp"
android:text="正在删除..." android:id="@+id/message"/>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners android:radius="10dp"/>
<solid android:color="#55000000"/>

</shape>

public class CustomDialog extends Dialog { 2
private static int default_width = 160; //默认宽度
private static int default_height = 120;//默认高度
public CustomDialog(Context context, int layout, int style) {
this(context, default_width, default_height, layout, style);
}

public CustomDialog(Context context, int width, int height, int layout, int style) {
super(context, style);12
//set content
setContentView(layout);
//set window params
Window window = getWindow();
WindowManager.LayoutParams params = window.getAttributes();
//set width,height by density and gravity
float density = getDensity(context);
params.width = (int) (width*density);
params.height = (int) (height*density);
params.gravity = Gravity.CENTER;
window.setAttributes(params);
}
private float getDensity(Context context) {
Resources resources = context.getResources();
DisplayMetrics dm = resources.getDisplayMetrics();
return dm.density;
}
}

public class CustomDialogDemoActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test);
CustomDialog dialog1 = new CustomDialog(this, R.layout.common_dialog, R.style.Theme_dialog);//Dialog使用默认大小(160)
CustomDialog dialog2 = new CustomDialog(this, 180, 180, R.layout.common_dialog, R.style.Theme_dialog);
dialog2.show();//显示Dialog
　　　　//如果要修改Dialog中的某个View,比如把"正在删除..."改为"加载中..."
TextView mMessage = (TextView) dialog2.findViewById(R.id.message);
mMessage.setText("加载中...");
}
}