9

我有Dialog片段问题。带有我的自定义布局的简单对话框工作正常。但是我想在显示对话框时启动控件。我正在尝试在 method 中执行此操作onActivityCreated。但是getView()返回 null，所以我认为我必须将自定义视图设置为onCreateView而不是onCreateDialog. 这里发生了错误。当我使用 onCreateView 时，我的应用程序崩溃了。这是我的代码：

class StatisticDialog extends DialogFragment {
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        // Use the Builder class for convenient dialog construction
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder .setPositiveButton(getString(android.R.string.ok), new DialogInterface.OnClickListener() {
                   public void onClick(DialogInterface dialog, int id) {
                       // FIRE ZE MISSILES!
                   }
               });
        // Create the AlertDialog object and return it
        return builder.create();
    }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        return inflater.inflate(R.layout.statistics, container, true);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
    }
}

我在按钮单击活动时打开此对话框：

StatisticDialog dlg = new StatisticDialog(); 
dlg.show(getSupportFragmentManager(), "missiles");

和错误：

11-08 18:05:14.470: E/AndroidRuntime(1075): FATAL EXCEPTION: main
11-08 18:05:14.470: E/AndroidRuntime(1075): android.util.AndroidRuntimeException: requestFeature() must be called before adding content
11-08 18:05:14.470: E/AndroidRuntime(1075):     at com.android.internal.policy.impl.PhoneWindow.requestFeature(PhoneWindow.java:215)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at com.android.internal.app.AlertController.installContent(AlertController.java:234)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at android.app.AlertDialog.onCreate(AlertDialog.java:336)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at android.app.Dialog.dispatchOnCreate(Dialog.java:351)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at android.app.Dialog.show(Dialog.java:256)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at android.support.v4.app.DialogFragment.onStart(DialogFragment.java:385)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at android.support.v4.app.Fragment.performStart(Fragment.java:1336)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:907)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1083)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:635)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1431)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:420)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at android.os.Handler.handleCallback(Handler.java:615)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at android.os.Handler.dispatchMessage(Handler.java:92)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at android.os.Looper.loop(Looper.java:137)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at android.app.ActivityThread.main(ActivityThread.java:4745)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at java.lang.reflect.Method.invokeNative(Native Method)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at java.lang.reflect.Method.invoke(Method.java:511)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-08 18:05:14.470: E/AndroidRuntime(1075):     at dalvik.system.NativeStart.main(Native Method)
4

4 回答 4

6

尝试这个：

class StatisticDialog extends DialogFragment {
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        // Use the Builder class for convenient dialog construction
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        LayoutInflater inflater = getActivity().getLayoutInflater();
        View view = inflater.inflate(R.layout.statistics, null);
        builder.setView(view);
        builder.setPositiveButton(getString(android.R.string.ok), new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
                // FIRE ZE MISSILES!
            }
        });
        // Create the AlertDialog object and return it
        return builder.create();
    }
}
于 2012-11-28T17:12:29.377 回答
2

避免请求功能崩溃：

public class MyCombinedFragment extends DialogFragment
{
    private boolean isModal = false;

    public static MyCombinedFragment newInstance()
    {
        MyCombinedFragment frag = new MyCombinedFragment();
        frag.isModal = true; // WHEN FRAGMENT IS CALLED AS A DIALOG SET FLAG
        return frag;
    }

    public MyCombinedFragment()
    {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
    {
        if(isModal) // AVOID REQUEST FEATURE CRASH
        {
        return super.onCreateView(inflater, container, savedInstanceState);
        }
        else
        {
        View view = inflater.inflate(R.layout.fragment_layout, container, false);
        setupUI(view);
        return view;
        }
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState)
    {
        AlertDialog.Builder alertDialogBuilder = null;
        alertDialogBuilder = new AlertDialog.Builder(getActivity());
        View view = getActivity().getLayoutInflater().inflate(R.layout.fragment_layout, null);
        alertDialogBuilder.setView(view);
        alertDialogBuilder.setTitle(“Modal Dialog“);
        alertDialogBuilder.setPositiveButton("Cancel", new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                dialog.dismiss();
            }
        });
        setupUI(view);
        return alertDialogBuilder.create();
    }
}
于 2014-02-08T08:10:24.263 回答
0

您应该使用灵活的 DialogFragment 将其设置为任何布局。你应该按照这个步骤。也许它很复杂，但非常强大和灵活。更重要的是您的活动从 Dialogfragment 获取日期。

1-创建一个实例类来监听并从您的活动中获取对话片段的日期。我将其命名为 OnMFDialogFragmentDoneListener.java。

2-创建您的 DialogFragment 并在 onCreateView 方法中定义您的布局，以及 3-在您的活动中使用您的类和新方法

我创建了一个 DialogFragment 来获取用户名和密码表单用户并将此日期传递给活动。对话框片段包含一个文本视图、两个 EditText 和两个按钮（登录和取消。但你可以使用任何东西。

第 1 步：OnMFDialogFragmentDoneListener.java

public interface OnMFDialogFragmentDoneListener {

public void onMFDialogFragmentDone(String tag,boolean cancelled,
                               CharSequence username,
                               CharSequence password);
}

必须在 DialogFragment 类中定义 onMFDialogFragmentDone 方法以将信息发送到您的活动并在您的活动中获取信息。（信息=用户在 DialogFragmetn 中键入的日期，如 txt 或其他）。

step2 设计您的 DialogFragment 类。

  public class MFDialogFragment extends DialogFragment
    implements View.OnClickListener{


private EditText editTextusername,editTextpassword;

public static MFDialogFragment newInstance(String title){
    MFDialogFragment mfDialogFragment=new MFDialogFragment();

    Bundle bundle =new Bundle();
    bundle.putString("title",title);
    mfDialogFragment.setArguments(bundle);
    return mfDialogFragment;
}



@Override
public void onAttach(Activity act){

    try{
        OnMFDialogFragmentDoneListener
                test= (OnMFDialogFragmentDoneListener) act;
    }catch (ClassCastException cce){
        ////...activity !!!! not listen to me
    }
        super.onAttach(act);
}


@Override
public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    this.setCancelable(true);
    int style = DialogFragment.STYLE_NORMAL, theme = 0;
    setStyle(style, theme);
}

public View onCreateView(LayoutInflater inflater,
                         ViewGroup container, Bundle bundle) {

        View v = inflater.inflate(R.layout.mfdialogfragmentlayout, container,
                false);

        TextView tvtitle = (TextView) v.findViewById(R.id.tv_dialogfragmentuserpass_title);
        tvtitle.setText(getArguments().getString("title"));

        editTextusername = (EditText) v.findViewById(R.id.et_dialogfragmentuserpass_username);
        editTextpassword = (EditText) v.findViewById(R.id.et_dialogfragmentuserpass_password);


        Button btnlogin = (Button) v.findViewById(R.id.btn_dialogfragmentuserpass_login);
        btnlogin.setOnClickListener(this);
        Button btncancel = (Button) v.findViewById(R.id.btn_dialogfragmentuserpass_cancel);
        btncancel.setOnClickListener(this);


    if(bundle!=null) {
        editTextpassword.setText(bundle.getCharSequence("SaveInstanceStatepassword"));
        editTextusername.setText(bundle.getCharSequence("SaveInstanceStateusername"));
    }






    return v;
}

@Override
public void onSaveInstanceState(Bundle icicle) {
    super.onSaveInstanceState(icicle);
    icicle.putCharSequence("SaveInstanceStatepassword", editTextpassword.getText());
    icicle.putCharSequence("SaveInstanceStateusername", editTextusername.getText());

}


public void onClick(View v)
{
    OnMFDialogFragmentDoneListener act = (OnMFDialogFragmentDoneListener)getActivity();
    if (v.getId() == R.id.btn_dialogfragmentuserpass_login)
    {

        act.onMFDialogFragmentDone(this.getTag(), false,
                editTextusername.getText(),editTextpassword.getText());
        dismiss();
        return;
    }
    if (v.getId() == R.id.btn_dialogfragmentuserpass_cancel)
    {
        act.onMFDialogFragmentDone(this.getTag(), true, "nousername", "nopass");
        dismiss();
        return;
    }


}
}

第 3 步-首先在活动中使用 DialogFragment，将代码“implements OnMFDialogFragmentDoneListener”添加到活动类中，例如

public class MainActivity extends Activity
    implements OnMFDialogFragmentDoneListener

第二

public static final String 
PROMPT_MFDIALOGFRAGMENT_TAG="PROMPT_MFDIALOGFRAGMENT_TAG";

第三

定义获取输入到 Dialogfragment 的数据的方法

public  void  onMFDialogFragmentDone(String tag, boolean cancelled,
                                     CharSequence username,
                                     CharSequence password){
    String total;

    total=username.toString()+"...."+password.toString();
    Toast.makeText(this,total,Toast.LengthShort).show();
}

你的日期是用户名和密码接下来是定义一个简单的方法来调用你的对话框

public void MFDialogFragmentShow(){
    FragmentTransaction ft = getFragmentManager().beginTransaction();
    MFDialogFragment mfDialogFragment =
            MFDialogFragment.newInstance("Login to your account");
    mfDialogFragment.show(ft, PROMPT_MFDIALOGFRAGMENT_TAG);

}

完成。你的片段布局 mfdialogfragmentlayout.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Title"
    android:id="@+id/tv_dialogfragmentuserpass_title"/>
<EditText
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:hint="User Name"

    android:id="@+id/et_dialogfragmentuserpass_username"/>
<EditText
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:hint="Password"
    android:password="true"
    android:id="@+id/et_dialogfragmentuserpass_password"/>
<LinearLayout
    android:orientation="horizontal"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Login"
        android:id="@+id/btn_dialogfragmentuserpass_login"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Cancel"
        android:id="@+id/btn_dialogfragmentuserpass_cancel"/>


    </LinearLayout>
</LinearLayout>
于 2017-07-17T07:28:50.340 回答
-1

DialogFragment 类中存在 getShowDialog() 方法。这是一个解释：developer.android.com

 if (!getShowsDialog()) {
            View rootView = inflater.inflate(R.layout.fr_layout, container, false);
            initViews(rootView);
            return rootView;
        } else {
            return super.onCreateView(inflater, container, savedInstanceState);
        }
    }
于 2015-01-15T07:44:46.627 回答