这是个展示dialog窗口的fragment。这个fragment包含了一个Dialog对象,它的展示是基于fragment的状态。控制dialog(决定要show,hide,dismiss等)应该通过dialogfragment的api而不是dialog的
实现这个类需要通过override方法onCreateView(LayoutInflater, ViewGroup, Bundle)来填充dialog的内容。另外,可以override方法onCreateDialog(Bundle)来创建一个完全自定义的dialog。
生命周期:
DialogFragment做了很多事情来控制fragment的生命周期,而不是dialog的。注意dialog是完全自主的,它有自己的window,接收自己的输入事件,经常自己决定什么时候消失(通过back键或者用户点击dialog上的button)。
DialogFragment需要保证Fragment和Dialog的状态保持一致。它监听dialog的dissmiss event,并且去处理自己的状态。这意味着应该调用 show(FragmentManager, String)或者show(FragmentTransaction, String)来添加一个DialogFragment的实例给UI层,并且它自主将remove当dialog消失的时候。
DialogFragment说到底还是个fragment,它爹能干的事情它也都能做,所以也可以是 通过ft.addToBackStack(null)压倒栈中,通过back键逐个resume,也可以被嵌套到更大层的UI中。
下面是个简单的dialog fragment:
- public static class MyDialogFragment extends DialogFragment {
- static MyDialogFragment newInstance() {
- return new MyDialogFragment();
- }
- @Override
- public View onCreateView(LayoutInflater inflater, ViewGroup container,
- Bundle savedInstanceState) {
- View v = inflater.inflate(R.layout.hello_world, container, false);
- View tv = v.findViewById(R.id.text);
- ((TextView)tv).setText("This is an instance of MyDialogFragment");
- return v;
- }
- }
public static class MyDialogFragment extends DialogFragment {
static MyDialogFragment newInstance() {
return new MyDialogFragment();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.hello_world, container, false);
View tv = v.findViewById(R.id.text);
((TextView)tv).setText("This is an instance of MyDialogFragment");
return v;
}
}
下面是按照dialog形式来显示:
- void showDialog() {
- // Create the fragment and show it as a dialog.
- DialogFragment newFragment = MyDialogFragment.newInstance();
- newFragment.show(getFragmentManager(), "dialog");
- }
void showDialog() {
// Create the fragment and show it as a dialog.
DialogFragment newFragment = MyDialogFragment.newInstance();
newFragment.show(getFragmentManager(), "dialog");
}
下面是添加到另一个view布局中
- FragmentTransaction ft = getFragmentManager().beginTransaction();
- DialogFragment newFragment = MyDialogFragment.newInstance();
- ft.add(R.id.embedded, newFragment);
- ft.commit();
FragmentTransaction ft = getFragmentManager().beginTransaction();
DialogFragment newFragment = MyDialogFragment.newInstance();
ft.add(R.id.embedded, newFragment);
ft.commit();
看了百度新闻的dialog和自身UI框架是挺一致的。下面是根据它的样式的模拟的代码。
先看看style
- <style name="DialogStyle" parent="@android:style/Theme.Dialog">
- <item name="android:windowBackground">@drawable/settings_window</item>
- <item name="android:windowFrame">@null</item>
- <item name="android:windowNoTitle">true</item>
- <item name="android:windowIsFloating">true</item>
- <item name="android:windowIsTranslucent">true</item>
- <item name="android:background">@android:color/background_light</item>
- <item name="android:windowFullscreen">true</item>
- <item name="android:backgroundDimEnabled">true</item>
- </style>
<style name="DialogStyle" parent="@android:style/Theme.Dialog">
<item name="android:windowBackground">@drawable/settings_window</item>
<item name="android:windowFrame">@null</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowIsFloating">true</item>
<item name="android:windowIsTranslucent">true</item>
<item name="android:background">@android:color/background_light</item>
<item name="android:windowFullscreen">true</item>
<item name="android:backgroundDimEnabled">true</item>
</style>
Style:是一个包含一种或者多种格式化属性的集合,我们可以将其用为一个单位用在布局XML单个元素当中。比如,我们可以定义一种风格来定义文本的字号大小和颜色,然后将其用在View元素的一个特定的实例。
Theme:是一个包含一种或者多种格式化属性的集合,我们可以将其为一个单位用在应用中所有的Activity当中或者应用中的某个Activity当 中。比如,我们可以定义一个Theme,它为window frame和panel 的前景和背景定义了一组颜色,并为菜单定义可文字的大小和颜色属性,可以将这个Theme应用在你程序当中所有的Activity里。
定义Style和Theme我觉得主要是可重用性。
dialog的自定义的view
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="300.0dip"
- android:layout_height="fill_parent"
- android:orientation="vertical" >
- <TextView
- android:id="@+id/title_text_view"
- android:layout_width="300.0dip"
- android:layout_height="wrap_content"
- android:layout_gravity="center_horizontal"
- android:layout_marginBottom="10.0dip"
- android:layout_marginTop="20.0dip"
- android:gravity="center_horizontal"
- android:text="@string/dialog_default_title"
- android:textColor="@color/dialog_title_text_color"
- android:textSize="16.0sp" />
- <TextView
- android:id="@+id/content_text_view"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:layout_gravity="center_horizontal"
- android:layout_marginBottom="20.0dip"
- android:layout_marginLeft="15.0dip"
- android:layout_marginRight="15.0dip"
- android:gravity="left"
- android:text="@string/dialog_latest_prompt"
- android:textColor="@color/dialog_content_text_color"
- android:textSize="16.0sp" />
- <View
- android:layout_width="300.0dip"
- android:layout_height="1.0dip"
- android:background="#ffdddddd" />
- <LinearLayout
- android:id="@+id/option_bar"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:background="@color/dialog_btn_bg_color"
- android:orientation="horizontal" >
- <TextView
- android:id="@+id/dialog_ok"
- android:layout_width="0.0dip"
- android:layout_height="wrap_content"
- android:layout_weight="1.0"
- android:background="@drawable/dialog_btn_selector"
- android:gravity="center"
- android:paddingBottom="14.0dip"
- android:paddingTop="14.0dip"
- android:text="@string/dialog_ok"
- android:textColor="@color/dialog_content_text_color"
- android:textSize="18.0sp" />
- <View
- android:layout_width="1.0dip"
- android:layout_height="fill_parent"
- android:background="#ffdddddd" />
- <TextView
- android:id="@+id/dialog_cancel"
- android:layout_width="0.0dip"
- android:layout_height="wrap_content"
- android:layout_weight="1.0"
- android:background="@drawable/dialog_btn_selector"
- android:gravity="center"
- android:paddingBottom="14.0dip"
- android:paddingTop="14.0dip"
- android:text="@string/dialog_cancel"
- android:textColor="@color/dialog_content_text_color"
- android:textSize="18.0sp" />
- </LinearLayout>
- <TextView
- android:id="@+id/ok_text_view"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:background="@drawable/dialog_btn_selector"
- android:gravity="center"
- android:paddingBottom="14.0dip"
- android:paddingTop="14.0dip"
- android:text="@string/dialog_ok_label"
- android:textColor="@color/dialog_content_text_color"
- android:textSize="18.0sp"
- android:visibility="gone" />
- </LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="300.0dip"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/title_text_view"
android:layout_width="300.0dip"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="10.0dip"
android:layout_marginTop="20.0dip"
android:gravity="center_horizontal"
android:text="@string/dialog_default_title"
android:textColor="@color/dialog_title_text_color"
android:textSize="16.0sp" />
<TextView
android:id="@+id/content_text_view"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="20.0dip"
android:layout_marginLeft="15.0dip"
android:layout_marginRight="15.0dip"
android:gravity="left"
android:text="@string/dialog_latest_prompt"
android:textColor="@color/dialog_content_text_color"
android:textSize="16.0sp" />
<View
android:layout_width="300.0dip"
android:layout_height="1.0dip"
android:background="#ffdddddd" />
<LinearLayout
android:id="@+id/option_bar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@color/dialog_btn_bg_color"
android:orientation="horizontal" >
<TextView
android:id="@+id/dialog_ok"
android:layout_width="0.0dip"
android:layout_height="wrap_content"
android:layout_weight="1.0"
android:background="@drawable/dialog_btn_selector"
android:gravity="center"
android:paddingBottom="14.0dip"
android:paddingTop="14.0dip"
android:text="@string/dialog_ok"
android:textColor="@color/dialog_content_text_color"
android:textSize="18.0sp" />
<View
android:layout_width="1.0dip"
android:layout_height="fill_parent"
android:background="#ffdddddd" />
<TextView
android:id="@+id/dialog_cancel"
android:layout_width="0.0dip"
android:layout_height="wrap_content"
android:layout_weight="1.0"
android:background="@drawable/dialog_btn_selector"
android:gravity="center"
android:paddingBottom="14.0dip"
android:paddingTop="14.0dip"
android:text="@string/dialog_cancel"
android:textColor="@color/dialog_content_text_color"
android:textSize="18.0sp" />
</LinearLayout>
<TextView
android:id="@+id/ok_text_view"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/dialog_btn_selector"
android:gravity="center"
android:paddingBottom="14.0dip"
android:paddingTop="14.0dip"
android:text="@string/dialog_ok_label"
android:textColor="@color/dialog_content_text_color"
android:textSize="18.0sp"
android:visibility="gone" />
</LinearLayout>
DialogFragment
- public static class CustomDialogFragment extends DialogFragment{
- public static interface DialogClickListener{
- public void doPositiveClick();
- public void doNegativeClick();
- }
- static DialogClickListener mListener;
- public CustomDialogFragment(){
- }
- public static CustomDialogFragment newInstance(String title, String message, DialogClickListener listener){
- CustomDialogFragment frag = new CustomDialogFragment();
- Bundle b = new Bundle();
- b.putString("title", title);
- b.putString("message", message);
- frag.setArguments(b);
- mListener = listener;
- return frag;
- }
- @Override
- public Dialog onCreateDialog(Bundle savedInstanceState) {
- final Dialog dialog = new Dialog(getActivity(), R.style.DialogStyle);
- LayoutInflater inflater = (LayoutInflater) getActivity()
- .getSystemService(LAYOUT_INFLATER_SERVICE);
- View view = inflater.inflate(R.layout.dialog_layout, null, false);
- String title = getArguments().getString("title");
- String message = getArguments().getString("message");
- if (title != null && title.length() > 0) {
- TextView t = (TextView) view.findViewById(R.id.title_text_view);
- t.setText(title);
- }
- if (message != null && message.length() > 0) {
- TextView m = (TextView) view
- .findViewById(R.id.content_text_view);
- m.setText(message);
- }
- View ok = view.findViewById(R.id.dialog_ok);
- View cancel = view.findViewById(R.id.dialog_cancel);
- ok.setOnClickListener(new OnClickListener() {
- @Override
- public void onClick(View v) {
- dialog.dismiss();
- if (mListener != null) {
- mListener.doPositiveClick();
- }
- }
- });
- cancel.setOnClickListener(new OnClickListener() {
- @Override
- public void onClick(View v) {
- dialog.dismiss();
- if (mListener != null) {
- mListener.doNegativeClick();
- }
- }
- });
- dialog.setContentView(view);
- return dialog;
- }
- }
public static class CustomDialogFragment extends DialogFragment{
public static interface DialogClickListener{
public void doPositiveClick();
public void doNegativeClick();
}
static DialogClickListener mListener;
public CustomDialogFragment(){
}
public static CustomDialogFragment newInstance(String title, String message, DialogClickListener listener){
CustomDialogFragment frag = new CustomDialogFragment();
Bundle b = new Bundle();
b.putString("title", title);
b.putString("message", message);
frag.setArguments(b);
mListener = listener;
return frag;
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
final Dialog dialog = new Dialog(getActivity(), R.style.DialogStyle);
LayoutInflater inflater = (LayoutInflater) getActivity()
.getSystemService(LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.dialog_layout, null, false);
String title = getArguments().getString("title");
String message = getArguments().getString("message");
if (title != null && title.length() > 0) {
TextView t = (TextView) view.findViewById(R.id.title_text_view);
t.setText(title);
}
if (message != null && message.length() > 0) {
TextView m = (TextView) view
.findViewById(R.id.content_text_view);
m.setText(message);
}
View ok = view.findViewById(R.id.dialog_ok);
View cancel = view.findViewById(R.id.dialog_cancel);
ok.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
dialog.dismiss();
if (mListener != null) {
mListener.doPositiveClick();
}
}
});
cancel.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
dialog.dismiss();
if (mListener != null) {
mListener.doNegativeClick();
}
}
});
dialog.setContentView(view);
return dialog;
}
}
在合适的实际调用showDialog
- CustomDialogFragment newFragment = CustomDialogFragment.newInstance("title", "message", null);
- newFragment.show(getSupportFragmentManager(), "dialog");
CustomDialogFragment newFragment = CustomDialogFragment.newInstance("title", "message", null);
newFragment.show(getSupportFragmentManager(), "dialog");