实现点击按钮弹出对话框型fra，并从第二fragment获取EditeText的数据返回到第一Fra中并显示。
第一fra
1 package com.example.ourdiary.entries.write_page;
2
3 import android.os.Bundle;
4 import android.util.Log;
5 import android.view.LayoutInflater;
6 import android.view.View;
7 import android.view.ViewGroup;
8 import android.widget.TextView;
9
10 import androidx.annotation.NonNull;
11 import androidx.annotation.Nullable;
12 import androidx.fragment.app.Fragment;
13 import androidx.fragment.app.FragmentResultListener;
14
15 import com.example.ourdiary.R;
16
17 import com.example.ourdiary.entries.DiaryActivity;
18 import com.google.android.material.floatingactionbutton.FloatingActionButton;
19
20
21 public class DiaryWriteFragment extends Fragment {
22
23 private DiaryActivity activity;
24 FloatingActionButton fab_diary_write;
25 TextView tv_title,tv_content;
26 String result_title,result_content;
27
28
29 public DiaryWriteFragment(DiaryActivity activity) {
30 this.activity = activity;
31 }
32
33
34
35 public void onCreate(Bundle savedInstanceState) {
36 super.onCreate(savedInstanceState);
37 getParentFragmentManager().setFragmentResultListener("requestDiaryInputKey", this, new FragmentResultListener() {
38 @Override
39 public void onFragmentResult(@NonNull String requestKey, @NonNull Bundle bundle) {
40 // We use a String here, but any type that can be put in a Bundle is supported
41 result_title = bundle.getString("bundle_title");
42 result_content = bundle.getString("bundle_content");
43 // Log.d("test",result_title);
44 // Log.d("test",result_content);
45 tv_title.setText(result_title);
46 tv_content.setText(result_content);
47 }
48 });
49 }
50
51 /**
52 *
53 *@author home
54 *@time 2021/3/20 0:05
55 */
56 public View onCreateView(LayoutInflater inflater, ViewGroup container,
57 Bundle savedInstanceState) {
58 View rootView = inflater.inflate(R.layout.fg_diary_write,container,false);
59 return rootView;
60 }
61
62 @Override
63 public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
64 tv_title = view.findViewById(R.id.tv_fg_diary_write_title);
65 tv_content = view.findViewById(R.id.tv_fg_diary_write_content);
66 fab_diary_write = view.findViewById(R.id.fab_diary_write);
67
68 fab_diary_write.setOnClickListener(view1 -> {
69 DiaryWriteInputFragment diaryWriteInputFragment = new DiaryWriteInputFragment();
70 diaryWriteInputFragment.show(activity.getSupportFragmentManager(),"diaryInputDialogFragment");
71 });
72 }
73
74 }
第二fra
1 package com.example.ourdiary.entries.write_page;
2
3 import android.app.Dialog;
4 import android.content.DialogInterface;
5 import android.os.Bundle;
6 import android.util.Log;
7 import android.view.LayoutInflater;
8 import android.view.View;
9 import android.widget.Button;
10 import android.widget.EditText;
11
12 import androidx.annotation.NonNull;
13 import androidx.annotation.Nullable;
14 import androidx.appcompat.app.AlertDialog;
15 import androidx.fragment.app.DialogFragment;
16
17 import com.example.ourdiary.R;
18 import com.google.android.material.floatingactionbutton.FloatingActionButton;
19
20 public class DiaryWriteInputFragment extends DialogFragment {
21
22 EditText et_title,et_content;
23 FloatingActionButton fab_save;
24
25 @Override
26 public Dialog onCreateDialog(Bundle savedInstanceState) {
27 AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
28
29 LayoutInflater inflater = getActivity().getLayoutInflater();
30 View view = inflater.inflate(R.layout.fg_diary_write_input, null);
31 builder.setView(view);
32 et_title = view.findViewById(R.id.et_diary_write_title);
33 et_content = view.findViewById(R.id.et_diary_write_content);
34 fab_save = view.findViewById(R.id.fab_diary_input_save);
35
36
37 fab_save.setOnClickListener(v -> {
38 // Log.d("test","buttonsave!");
39 Bundle result = new Bundle();
40 result.putString("bundle_title", String.valueOf(et_title.getText()));
41 result.putString("bundle_content", String.valueOf(et_content.getText()));
42 getParentFragmentManager().setFragmentResult("requestDiaryInputKey", result);
43 dismiss();//使此fragment消失
44 });
45 return builder.create();
46 }
47
48 @Override
49 public void onCancel(@NonNull DialogInterface dialog) {
50 super.onCancel(dialog);
51 }
52
53 }
第一fra的xml
1 <?xml version="1.0" encoding="utf-8"?> 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" 5 xmlns:tools="http://schemas.android.com/tools" 6 android:orientation="vertical"> 7 8 <LinearLayout 9 android:layout_width="match_parent" 10 android:layout_height="wrap_content" 11 android:orientation="vertical"> 12 13 <TextView 14 android:id="@+id/tv_fg_diary_write" 15 android:layout_width="wrap_content" 16 android:layout_height="wrap_content" 17 android:text="this is write fragment!" 18 android:textSize="30sp" 19 android:paddingLeft="10dp"/> 20 21 <TextView 22 android:id="@+id/tv_fg_diary_write_title" 23 android:layout_width="match_parent" 24 android:layout_height="wrap_content"/> 25 26 <TextView 27 android:id="@+id/tv_fg_diary_write_content" 28 android:layout_width="match_parent" 29 android:layout_height="wrap_content"/> 30 31 32 <RelativeLayout 33 android:layout_alignParentRight="true" 34 android:layout_alignParentBottom="true" 35 android:layout_width="wrap_content" 36 android:layout_height="wrap_content"> 37 38 <LinearLayout 39 android:layout_width="wrap_content" 40 android:layout_height="wrap_content" 41 android:orientation="vertical" 42 android:paddingRight="20dp" 43 android:paddingBottom="20dp"> 44 45 <com.google.android.material.floatingactionbutton.FloatingActionButton 46 android:backgroundTint="@color/light_blue" 47 android:id="@+id/fab_diary_write" 48 android:layout_width="wrap_content" 49 android:layout_height="wrap_content" 50 android:contentDescription="add" 51 android:tint="@color/color_White" 52 android:src="@drawable/iv_memo_item_add_icon"/> 53 </LinearLayout> 54 </RelativeLayout> 55 56 </RelativeLayout>
第二fra的xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText
android:id="@+id/et_diary_write_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="enter your title here!"
android:textColorHint="@color/color_black"/>
<EditText
android:id="@+id/et_diary_write_content"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:hint="enter your content here!"
android:textColorHint="@color/color_black"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:backgroundTint="@color/light_blue"
android:id="@+id/fab_diary_input_save"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="add"
android:tint="@color/color_White"
android:layout_centerHorizontal="true"
android:src="@drawable/iv_diary_save"/>
</RelativeLayout>
</LinearLayout>