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android 使用DialogFragment 自定义Dialog

2013-05-16 17:45 435 查看
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:

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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:

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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

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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

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<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

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<?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

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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

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CustomDialogFragment newFragment = CustomDialogFragment.newInstance("title", "message", null);
newFragment.show(getSupportFragmentManager(), "dialog");

CustomDialogFragment newFragment = CustomDialogFragment.newInstance("title", "message", null);
newFragment.show(getSupportFragmentManager(), "dialog");
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