<p>转载请标明出处：<a href="http://blog.youkuaiyun.com/lmj623565791/article/details/37815413" target="_blank">http://blog.youkuaiyun.com/lmj623565791/article/details/37815413</a></p><h6>1、 概述</h6>DialogFragment在android 3.0时被引入。是一种特殊的Fragment，用于在Activity的内容之上展示一个模态的对话框。典型的用于：展示警告框，输入框，确认框等等。<br>在DialogFragment产生之前，我们创建对话框：一般采用AlertDialog和Dialog。注：官方不推荐直接使用Dialog创建对话框。<br><h6>2、 好处与用法</h6>使用DialogFragment来管理对话框，当旋转屏幕和按下后退键时可以更好的管理其声明周期，它和Fragment有着基本一致的声明周期。且DialogFragment也允许开发者把Dialog作为内嵌的组件进行重用，类似Fragment（可以在大屏幕和小屏幕显示出不同的效果）。上面会通过例子展示这些好处~<br><p>使用DialogFragment至少需要实现onCreateView或者onCreateDIalog方法。onCreateView即使用定义的xml布局文件展示Dialog。onCreateDialog即利用AlertDialog或者Dialog创建出Dialog。</p><h6>3、 重写onCreateView创建Dialog</h6><p>a)布局文件，我们创建一个设置名称的布局文件：</p><p></p><div class="dp-highlighter bg_html"><div class="bar"><div class="tools"><b>[html]</b> <a href="#" class="ViewSource" title="view plain" onclick="dp.sh.Toolbar.Command('ViewSource',this);return false;">view plain</a><span data-mod="popu_168"> <a href="#" class="CopyToClipboard" title="copy" onclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;">copy</a><div style="position: absolute; left: 582px; top: 738px; width: 16px; height: 16px; z-index: 99;"><embed id="ZeroClipboardMovie_1" src="https://csdnimg.cn/public/highlighter/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" name="ZeroClipboardMovie_1" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=1&width=16&height=16" wmode="transparent" width="16" height="16" align="middle"></div><div style="position: absolute; left: 582px; top: 738px; width: 16px; height: 16px; z-index: 99;"><embed id="ZeroClipboardMovie_14" src="https://csdnimg.cn/public/highlighter/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" name="ZeroClipboardMovie_14" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=14&width=16&height=16" wmode="transparent" width="16" height="16" align="middle"></div></span><span data-mod="popu_169"> <a href="#" class="PrintSource" title="print" onclick="dp.sh.Toolbar.Command('PrintSource',this);return false;">print</a></span><a href="#" class="About" title="?" onclick="dp.sh.Toolbar.Command('About',this);return false;">?</a></div></div><ol start="1" class="dp-xml"><li class="alt"><span><span class="tag"><?</span><span class="tag-name">xml</span><span> </span><span class="attribute">version</span><span>=</span><span class="attribute-value">"1.0"</span><span> </span><span class="attribute">encoding</span><span>=</span><span class="attribute-value">"utf-8"</span><span class="tag">?></span><span> </span></span></li><li class=""><span><span class="tag"><</span><span class="tag-name">RelativeLayout</span><span> </span><span class="attribute">xmlns:android</span><span>=</span><span class="attribute-value">"http://schemas.android.com/apk/res/android"</span><span> </span></span></li><li class="alt"><span> <span class="attribute">android:layout_width</span><span>=</span><span class="attribute-value">"wrap_content"</span><span> </span></span></li><li class=""><span> <span class="attribute">android:layout_height</span><span>=</span><span class="attribute-value">"wrap_content"</span><span> </span><span class="tag">></span><span> </span></span></li><li class="alt"><span> </span></li><li class=""><span> <span class="tag"><</span><span class="tag-name">TextView</span><span> </span></span></li><li class="alt"><span> <span class="attribute">android:id</span><span>=</span><span class="attribute-value">"@+id/id_label_your_name"</span><span> </span></span></li><li class=""><span> <span class="attribute">android:layout_width</span><span>=</span><span class="attribute-value">"wrap_content"</span><span> </span></span></li><li class="alt"><span> <span class="attribute">android:layout_height</span><span>=</span><span class="attribute-value">"32dp"</span><span> </span></span></li><li class=""><span> <span class="attribute">android:gravity</span><span>=</span><span class="attribute-value">"center_vertical"</span><span> </span></span></li><li class="alt"><span> <span class="attribute">android:text</span><span>=</span><span class="attribute-value">"Your name:"</span><span> </span><span class="tag">/></span><span> </span></span></li><li class=""><span> </span></li><li class="alt"><span> <span class="tag"><</span><span class="tag-name">EditText</span><span> </span></span></li><li class=""><span> <span class="attribute">android:id</span><span>=</span><span class="attribute-value">"@+id/id_txt_your_name"</span><span> </span></span></li><li class="alt"><span> <span class="attribute">android:layout_width</span><span>=</span><span class="attribute-value">"match_parent"</span><span> </span></span></li><li class=""><span> <span class="attribute">android:layout_height</span><span>=</span><span class="attribute-value">"wrap_content"</span><span> </span></span></li><li class="alt"><span> <span class="attribute">android:layout_toRightOf</span><span>=</span><span class="attribute-value">"@id/id_label_your_name"</span><span> </span></span></li><li class=""><span> <span class="attribute">android:imeOptions</span><span>=</span><span class="attribute-value">"actionDone"</span><span> </span></span></li><li class="alt"><span> <span class="attribute">android:inputType</span><span>=</span><span class="attribute-value">"text"</span><span> </span><span class="tag">/></span><span> </span></span></li><li class=""><span> </span></li><li class="alt"><span> <span class="tag"><</span><span class="tag-name">Button</span><span> </span></span></li><li class=""><span> <span class="attribute">android:id</span><span>=</span><span class="attribute-value">"@+id/id_sure_edit_name"</span><span> </span></span></li><li class="alt"><span> <span class="attribute">android:layout_width</span><span>=</span><span class="attribute-value">"wrap_content"</span><span> </span></span></li><li class=""><span> <span class="attribute">android:layout_height</span><span>=</span><span class="attribute-value">"wrap_content"</span><span> </span></span></li><li class="alt"><span> <span class="attribute">android:layout_alignParentRight</span><span>=</span><span class="attribute-value">"true"</span><span> </span></span></li><li class=""><span> <span class="attribute">android:layout_below</span><span>=</span><span class="attribute-value">"@id/id_txt_your_name"</span><span> </span></span></li><li class="alt"><span> <span class="attribute">android:text</span><span>=</span><span class="attribute-value">"ok"</span><span> </span><span class="tag">/></span><span> </span></span></li><li class=""><span> </span></li><li class="alt"><span><span class="tag"></</span><span class="tag-name">RelativeLayout</span><span class="tag">></span><span> </span></span></li></ol></div><pre class="html" name="code" style="display: none;"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android=”http://schemas.android.com/apk/res/android”
android:layout_width=”wrap_content”
android:layout_height=”wrap_content” >
<TextView
android:id="@+id/id_label_your_name"
android:layout_width="wrap_content"
android:layout_height="32dp"
android:gravity="center_vertical"
android:text="Your name:" />
<EditText
android:id="@+id/id_txt_your_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/id_label_your_name"
android:imeOptions="actionDone"
android:inputType="text" />
<Button
android:id="@+id/id_sure_edit_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="@id/id_txt_your_name"
android:text="ok" />
</RelativeLayout>
b)继承DialogFragment，重写onCreateView方法
- package com.example.zhy_dialogfragment;
- import android.app.DialogFragment;
- import android.os.Bundle;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.ViewGroup;
- public class EditNameDialogFragment extends DialogFragment
- {
- @Override
- public View onCreateView(LayoutInflater inflater, ViewGroup container,
- Bundle savedInstanceState)
- {
- View view = inflater.inflate(R.layout.fragment_edit_name, container);
- return view;
- }
- }
package com.example.zhy_dialogfragment;import android.app.DialogFragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;public class EditNameDialogFragment extends DialogFragment
{@Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_edit_name, container); return view; }}
c)测试运行：
Main方法中调用：
- public void showEditDialog(View view)
- {
- EditNameDialogFragment editNameDialog = new EditNameDialogFragment();
- editNameDialog.show(getFragmentManager(), ”EditNameDialog”);
- }
public void showEditDialog(View view)
{
EditNameDialogFragment editNameDialog = new EditNameDialogFragment();
editNameDialog.show(getFragmentManager(), "EditNameDialog");
}
可以看到，对话框成功创建并显示出来，不过默认对话框有个讨厌的标题，我们怎么去掉呢：可以在onCreateView中调用getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE);即可去掉。即：
- public class EditNameDialogFragment extends DialogFragment
- {
- @Override
- public View onCreateView(LayoutInflater inflater, ViewGroup container,
- Bundle savedInstanceState)
- {
- getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE);
- View view = inflater.inflate(R.layout.fragment_edit_name, container);
- return view;
- }
- }
public class EditNameDialogFragment extends DialogFragment
{@Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE); View view = inflater.inflate(R.layout.fragment_edit_name, container); return view; }}
效果图：
很完美的去掉了讨厌的标题。
4、 重写onCreateDialog创建Dialog
在onCreateDialog中一般可以使用AlertDialog或者Dialog创建对话框，不过既然google不推荐直接使用Dialog，我们就使用AlertDialog来创建一个登录的对话框。a)布局文件
- <?xml version=“1.0” encoding=“utf-8”?>
- <LinearLayout xmlns:android=”http://schemas.android.com/apk/res/android”
- android:layout_width=“wrap_content”
- android:layout_height=“wrap_content”
- android:orientation=“vertical” >
- <ImageView
- android:layout_width=“match_parent”
- android:layout_height=“64dp”
- android:background=“#FFFFBB33”
- android:contentDescription=“@string/app_name”
- android:scaleType=“center”
- android:src=“@drawable/title” />
- <EditText
- android:id=“@+id/id_txt_username”
- android:layout_width=“match_parent”
- android:layout_height=“wrap_content”
- android:layout_marginBottom=“4dp”
- android:layout_marginLeft=“4dp”
- android:layout_marginRight=“4dp”
- android:layout_marginTop=“16dp”
- android:hint=“input username”
- android:inputType=“textEmailAddress” />
- <EditText
- android:id=“@+id/id_txt_password”
- android:layout_width=“match_parent”
- android:layout_height=“wrap_content”
- android:layout_marginBottom=“16dp”
- android:layout_marginLeft=“4dp”
- android:layout_marginRight=“4dp”
- android:layout_marginTop=“4dp”
- android:fontFamily=“sans-serif”
- android:hint=“input password”
- android:inputType=“textPassword” />
- </LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" ><ImageView android:layout_width="match_parent" android:layout_height="64dp" android:background="#FFFFBB33" android:contentDescription="@string/app_name" android:scaleType="center" android:src="@drawable/title" /> <EditText android:id="@+id/id_txt_username" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginBottom="4dp" android:layout_marginLeft="4dp" android:layout_marginRight="4dp" android:layout_marginTop="16dp" android:hint="input username" android:inputType="textEmailAddress" /> <EditText android:id="@+id/id_txt_password" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginBottom="16dp" android:layout_marginLeft="4dp" android:layout_marginRight="4dp" android:layout_marginTop="4dp" android:fontFamily="sans-serif" android:hint="input password" android:inputType="textPassword" /></LinearLayout>
b)继承DialogFragment重写onCreateDialog方法
- package com.example.zhy_dialogfragment;
- import android.app.AlertDialog;
- import android.app.Dialog;
- import android.app.DialogFragment;
- import android.content.DialogInterface;
- import android.os.Bundle;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.ViewGroup;
- import android.widget.EditText;
- public class LoginDialogFragment extends DialogFragment
- {
- @Override
- public Dialog onCreateDialog(Bundle savedInstanceState)
- {
- AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
- // Get the layout inflater
- LayoutInflater inflater = getActivity().getLayoutInflater();
- View view = inflater.inflate(R.layout.fragment_login_dialog, null);
- // Inflate and set the layout for the dialog
- // Pass null as the parent view because its going in the dialog layout
- builder.setView(view)
- // Add action buttons
- .setPositiveButton(”Sign in”,
- new DialogInterface.OnClickListener()
- {
- @Override
- public void onClick(DialogInterface dialog, int id)
- {
- }
- }).setNegativeButton(”Cancel”, null);
- return builder.create();
- }
- }
package com.example.zhy_dialogfragment;import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;public class LoginDialogFragment extends DialogFragment
{@Override public Dialog onCreateDialog(Bundle savedInstanceState) { AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); // Get the layout inflater LayoutInflater inflater = getActivity().getLayoutInflater(); View view = inflater.inflate(R.layout.fragment_login_dialog, null); // Inflate and set the layout for the dialog // Pass null as the parent view because its going in the dialog layout builder.setView(view) // Add action buttons .setPositiveButton("Sign in", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { } }).setNegativeButton("Cancel", null); return builder.create(); }}
c)调用
- public void showLoginDialog(View view)
- {
- LoginDialogFragment dialog = new LoginDialogFragment();
- dialog.show(getFragmentManager(), ”loginDialog”);
- }
public void showLoginDialog(View view)
{
LoginDialogFragment dialog = new LoginDialogFragment();
dialog.show(getFragmentManager(), "loginDialog");
}
效果图：
可以看到通过重写onCreateDialog同样可以实现创建对话框，效果还是很nice的。
5、传递数据给Activity
从dialog传递数据给Activity，可以使用“fragment interface pattern”的方式，下面通过一个改造上面的登录框来展示这种模式。
改动比较小，直接贴代码了：
- package com.example.zhy_dialogfragment;
- import android.app.AlertDialog;
- import android.app.Dialog;
- import android.app.DialogFragment;
- import android.content.DialogInterface;
- import android.os.Bundle;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.ViewGroup;
- import android.widget.EditText;
- public class LoginDialogFragment extends DialogFragment
- {
- private EditText mUsername;
- private EditText mPassword;
- public interface LoginInputListener
- {
- void onLoginInputComplete(String username, String password);
- }
- @Override
- public Dialog onCreateDialog(Bundle savedInstanceState)
- {
- AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
- // Get the layout inflater
- LayoutInflater inflater = getActivity().getLayoutInflater();
- View view = inflater.inflate(R.layout.fragment_login_dialog, null);
- mUsername = (EditText) view.findViewById(R.id.id_txt_username);
- mPassword = (EditText) view.findViewById(R.id.id_txt_password);
- // Inflate and set the layout for the dialog
- // Pass null as the parent view because its going in the dialog layout
- builder.setView(view)
- // Add action buttons
- .setPositiveButton(”Sign in”,
- new DialogInterface.OnClickListener()
- {
- @Override
- public void onClick(DialogInterface dialog, int id)
- {
- LoginInputListener listener = (LoginInputListener) getActivity();
- listener.onLoginInputComplete(mUsername
- .getText().toString(), mPassword
- .getText().toString());
- }
- }).setNegativeButton(”Cancel”, null);
- return builder.create();
- }
- }
package com.example.zhy_dialogfragment;import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;public class LoginDialogFragment extends DialogFragment
{
private EditText mUsername;
private EditText mPassword;public interface LoginInputListener { void onLoginInputComplete(String username, String password); } @Override public Dialog onCreateDialog(Bundle savedInstanceState) { AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); // Get the layout inflater LayoutInflater inflater = getActivity().getLayoutInflater(); View view = inflater.inflate(R.layout.fragment_login_dialog, null); mUsername = (EditText) view.findViewById(R.id.id_txt_username); mPassword = (EditText) view.findViewById(R.id.id_txt_password); // Inflate and set the layout for the dialog // Pass null as the parent view because its going in the dialog layout builder.setView(view) // Add action buttons .setPositiveButton("Sign in", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { LoginInputListener listener = (LoginInputListener) getActivity(); listener.onLoginInputComplete(mUsername .getText().toString(), mPassword .getText().toString()); } }).setNegativeButton("Cancel", null); return builder.create(); }}
拿到username和password的引用，在点击登录的时候，把activity强转为我们自定义的接口：LoginInputListener，然后将用户输入的数据返回。
MainActivity中需要实现我们的接口LoginInputListener，实现我们的方法，就可以实现当用户点击登陆时，获得我们的帐号密码了：
- c) MainActivity
- package com.example.zhy_dialogfragment;
- import com.example.zhy_dialogfragment.LoginDialogFragment.LoginInputListener;
- import android.app.Activity;
- import android.app.AlertDialog;
- import android.content.DialogInterface;
- import android.os.Bundle;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.widget.Toast;
- public class MainActivity extends Activity implements LoginInputListener
- {
- @Override
- protected void onCreate(Bundle savedInstanceState)
- {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- }
- public void showLoginDialog(View view)
- {
- LoginDialogFragment dialog = new LoginDialogFragment();
- dialog.show(getFragmentManager(), ”loginDialog”);
- }
- @Override
- public void onLoginInputComplete(String username, String password)
- {
- Toast.makeText(this, “帐号：” + username + “, 密码 :” + password,
- Toast.LENGTH_SHORT).show();
- }
- }
c) MainActivity
package com.example.zhy_dialogfragment;import com.example.zhy_dialogfragment.LoginDialogFragment.LoginInputListener;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Toast;public class MainActivity extends Activity implements LoginInputListener
{@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void showLoginDialog(View view) { LoginDialogFragment dialog = new LoginDialogFragment(); dialog.show(getFragmentManager(), "loginDialog"); } @Override public void onLoginInputComplete(String username, String password) { Toast.makeText(this, "帐号：" + username + ", 密码 :" + password, Toast.LENGTH_SHORT).show(); }}
效果：
6、DialogFragment做屏幕适配
我们希望，一个对话框在大屏幕上以对话框的形式展示，而小屏幕上则直接嵌入当前的Actvity中。这种效果的对话框，只能通过重写onCreateView实现。下面我们利用上面的EditNameDialogFragment来显示。
EditNameDialogFragment我们已经编写好了，直接在MainActivity中写调用
- public void showDialogInDifferentScreen(View view)
- {
- FragmentManager fragmentManager = getFragmentManager();
- EditNameDialogFragment newFragment = new EditNameDialogFragment();
- boolean mIsLargeLayout = getResources().getBoolean(R.bool.large_layout) ;
- Log.e(”TAG”, mIsLargeLayout+“”);
- if (mIsLargeLayout )
- {
- // The device is using a large layout, so show the fragment as a
- // dialog
- newFragment.show(fragmentManager, ”dialog”);
- } else
- {
- // The device is smaller, so show the fragment fullscreen
- FragmentTransaction transaction = fragmentManager
- .beginTransaction();
- // For a little polish, specify a transition animation
- transaction
- .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
- // To make it fullscreen, use the ‘content’ root view as the
- // container
- // for the fragment, which is always the root view for the activity
- transaction.replace(R.id.id_ly, newFragment)
- .commit();
- }
- }
public void showDialogInDifferentScreen(View view)
{
FragmentManager fragmentManager = getFragmentManager();
EditNameDialogFragment newFragment = new EditNameDialogFragment();boolean mIsLargeLayout = getResources().getBoolean(R.bool.large_layout) ; Log.e("TAG", mIsLargeLayout+""); if (mIsLargeLayout ) { // The device is using a large layout, so show the fragment as a // dialog newFragment.show(fragmentManager, "dialog"); } else { // The device is smaller, so show the fragment fullscreen FragmentTransaction transaction = fragmentManager .beginTransaction(); // For a little polish, specify a transition animation transaction .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN); // To make it fullscreen, use the 'content' root view as the // container // for the fragment, which is always the root view for the activity transaction.replace(R.id.id_ly, newFragment) .commit(); } }</pre><br>可以看到，我们通过读取R.bool.large_layout，然后根据得到的布尔值，如果是大屏幕则直接以对话框显示，如果是小屏幕则嵌入我们的Activity布局中<p></p><p>这个R.bool.large_layout是我们定义的资源文件：</p><p>在默认的values下新建一个bools.xml</p><p></p><div class="dp-highlighter bg_html"><div class="bar"><div class="tools"><b>[html]</b> <a href="#" class="ViewSource" title="view plain" onclick="dp.sh.Toolbar.Command('ViewSource',this);return false;">view plain</a><span data-mod="popu_168"> <a href="#" class="CopyToClipboard" title="copy" onclick="dp.sh.Toolbar.Command('CopyToClipboard',this);return false;">copy</a><div style="position: absolute; left: 582px; top: 9840px; width: 16px; height: 16px; z-index: 99;"><embed id="ZeroClipboardMovie_11" src="https://csdnimg.cn/public/highlighter/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" name="ZeroClipboardMovie_11" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=11&width=16&height=16" wmode="transparent" width="16" height="16" align="middle"></div><div style="position: absolute; left: 582px; top: 9840px; width: 16px; height: 16px; z-index: 99;"><embed id="ZeroClipboardMovie_24" src="https://csdnimg.cn/public/highlighter/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" name="ZeroClipboardMovie_24" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=24&width=16&height=16" wmode="transparent" width="16" height="16" align="middle"></div></span><span data-mod="popu_169"> <a href="#" class="PrintSource" title="print" onclick="dp.sh.Toolbar.Command('PrintSource',this);return false;">print</a></span><a href="#" class="About" title="?" onclick="dp.sh.Toolbar.Command('About',this);return false;">?</a></div></div><ol start="1" class="dp-xml"><li class="alt"><span><span class="tag"><?</span><span class="tag-name">xml</span><span> </span><span class="attribute">version</span><span>=</span><span class="attribute-value">"1.0"</span><span> </span><span class="attribute">encoding</span><span>=</span><span class="attribute-value">"utf-8"</span><span class="tag">?></span><span> </span></span></li><li class=""><span><span class="tag"><</span><span class="tag-name">resources</span><span class="tag">></span><span> </span></span></li><li class="alt"><span> </span></li><li class=""><span> <span class="tag"><</span><span class="tag-name">bool</span><span> </span><span class="attribute">name</span><span>=</span><span class="attribute-value">"large_layout"</span><span class="tag">></span><span>false</span><span class="tag"></</span><span class="tag-name">bool</span><span class="tag">></span><span> </span></span></li><li class="alt"><span> </span></li><li class=""><span><span class="tag"></</span><span class="tag-name">resources</span><span class="tag">></span><span> </span></span></li></ol></div><pre class="html" name="code" style="display: none;"><?xml version="1.0" encoding="utf-8"?><resources>
<bool name="large_layout">false</bool></resources>
然后在res下新建一个values-large，在values-large下再新建一个bools.xml
- <?xml version=“1.0” encoding=“utf-8”?>
- <resources>
- <bool name=“large_layout”>true</bool>
- </resources>
<?xml version="1.0" encoding="utf-8"?>
<resources><bool name="large_layout">true</bool></resources>
最后测试：
左边为模拟器，右边为我的手机~
7、屏幕旋转
当用户输入帐号密码时，忽然旋转了一下屏幕，帐号密码不见了~~~是不是会抓狂
传统的new AlertDialog在屏幕旋转时，第一不会保存用户输入的值，第二还会报异常，因为Activity销毁前不允许对话框未关闭。而通过DialogFragment实现的对话框则可以完全不必考虑旋转的问题。
我们直接把上面登录使用AlertDialog创建的登录框，拷贝到MainActivity中直接调用：
- public void showLoginDialogWithoutFragment(View view)
- {
- AlertDialog.Builder builder = new AlertDialog.Builder(this);
- // Get the layout inflater
- LayoutInflater inflater = this.getLayoutInflater();
- // Inflate and set the layout for the dialog
- // Pass null as the parent view because its going in the dialog layout
- builder.setView(inflater.inflate(R.layout.fragment_login_dialog, null))
- // Add action buttons
- .setPositiveButton(”Sign in”,
- new DialogInterface.OnClickListener()
- {
- @Override
- public void onClick(DialogInterface dialog, int id)
- {
- // sign in the user …
- }
- }).setNegativeButton(”Cancel”, null).show();
- }
public void showLoginDialogWithoutFragment(View view)
{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
// Get the layout inflater
LayoutInflater inflater = this.getLayoutInflater();// Inflate and set the layout for the dialog // Pass null as the parent view because its going in the dialog layout builder.setView(inflater.inflate(R.layout.fragment_login_dialog, null)) // Add action buttons .setPositiveButton("Sign in", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { // sign in the user ... } }).setNegativeButton("Cancel", null).show(); }
下面我分别点击两种方式创建的登录框，看效果图：
可以看到，传统的Dialog旋转屏幕时就消失了，且后台log会报异常~使用DialogFragment则不受影响。
好了，关于DialogFragment的介绍结束~~
有任何疑问请留言
参考文档：
http://developer.android.com/guide/topics/ui/dialogs.html#DialogFragment
https://github.com/thecodepath/android_guides/wiki/Using-DialogFragment
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