阶段：口算测试APP
作者：互联网
这几天把之前学的所有结合在了一起，做了个简易的APP
总体架构：
下面按照顺序上代码
MainActivity
package com.example.calculationtest;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.NavigationUI;
import android.content.DialogInterface;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity {
NavController controller;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
controller= Navigation.findNavController(this,R.id.fragment2);
NavigationUI.setupActionBarWithNavController(this,controller);
}
@Override
public boolean onSupportNavigateUp() {
if(controller.getCurrentDestination().getId()==R.id.questionFragment){
AlertDialog.Builder builder=new AlertDialog.Builder(this);
builder.setTitle(getString(R.string.quit_dialog_title));
builder.setPositiveButton(R.string.dialog_positive_message, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
controller.navigateUp();
}
});
builder.setNegativeButton(R.string.dialog_negative_message, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
AlertDialog dialog=builder.create();
dialog.show();
}else{
controller.navigate(R.id.titleFragment);
}
return super.onSupportNavigateUp();
}
@Override
public void onBackPressed() {
if(controller.getCurrentDestination().getId()==R.id.titleFragment){
super.onBackPressed();
}else{
onSupportNavigateUp();
}
}
}
MainActivity.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<fragment
android:id="@+id/fragment2"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:navGraph="@navigation/nav" />
</androidx.constraintlayout.widget.ConstraintLayout>
TitleFragment
package com.example.calculationtest;
import android.content.Intent;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.databinding.DataBindingUtil;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.SavedStateViewModelFactory;
import androidx.lifecycle.ViewModelProvider;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.calculationtest.databinding.FragmentTitleBinding;
/**
* A simple {@link Fragment} subclass.
*/
public class TitleFragment extends Fragment {
public TitleFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
MyViewModel myViewModel;
myViewModel=new ViewModelProvider(requireActivity(),new SavedStateViewModelFactory(requireActivity().getApplication(),this)).get(MyViewModel.class);
FragmentTitleBinding binding;
binding= DataBindingUtil.inflate(inflater,R.layout.fragment_title,container,false);
binding.setData(myViewModel);
binding.setLifecycleOwner(requireActivity());
binding.button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
NavController controller= Navigation.findNavController(view);
controller.navigate(R.id.action_titleFragment_to_questionFragment);
}
});
return binding.getRoot();
// Inflate the layout for this fragment
//return inflater.inflate(R.layout.fragment_title, container, false);
}
}
TitleFragment.xml
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data>
<variable
name="data"
type="com.example.calculationtest.MyViewModel" />
</data>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".TitleFragment">
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.1" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.9" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/title_message"
android:textSize="@dimen/huge_font"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/guideline2"
app:layout_constraintStart_toStartOf="@+id/guideline"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.15" />
<ImageView
android:id="@+id/imageView"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="50dp"
android:layout_marginEnd="50dp"
android:contentDescription="@string/title_image_info"
android:src="@drawable/suanshu"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintDimensionRatio="1:1"
app:layout_constraintEnd_toStartOf="@+id/guideline2"
app:layout_constraintStart_toStartOf="@+id/guideline"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="@string/title_nuton_message"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/guideline2"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="@+id/guideline"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.83" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@{@string/higeh_score(data.highScore)}"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.982"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.04"
tools:text="123" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
QuestionFragment
package com.example.calculationtest;
import android.os.Bundle;
import androidx.databinding.DataBindingUtil;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.SavedStateViewModelFactory;
import androidx.lifecycle.ViewModelProvider;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.calculationtest.databinding.FragmentQuestionBinding;
/**
* A simple {@link Fragment} subclass.
*/
public class QuestionFragment extends Fragment {
public QuestionFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final MyViewModel myViewModel;
myViewModel = new ViewModelProvider(getActivity(), new SavedStateViewModelFactory(getActivity().getApplication(), this)).get(MyViewModel.class);
myViewModel.generator();
myViewModel.getCurrentScore().setValue(0);
final FragmentQuestionBinding binding;
binding = DataBindingUtil.inflate(inflater, R.layout.fragment_question, container, false);
binding.setData(myViewModel);
binding.setLifecycleOwner(requireActivity());
final StringBuilder builder = new StringBuilder();
View.OnClickListener listener = new View.OnClickListener() {
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.button0:
builder.append("0");
break;
case R.id.button1:
builder.append("1");
break;
case R.id.button2:
builder.append("2");
break;
case R.id.button3:
builder.append("3");
break;
case R.id.button4:
builder.append("4");
break;
case R.id.button5:
builder.append("5");
break;
case R.id.button6:
builder.append("6");
break;
case R.id.button7:
builder.append("7");
break;
case R.id.button8:
builder.append("8");
break;
case R.id.button9:
builder.append("9");
break;
case R.id.button_clear:
builder.setLength(0);
break;
}
if (builder.length() == 0) {
binding.textView9.setText(R.string.input_indicator);
} else {
binding.textView9.setText(builder.toString());
}
}
};
binding.button0.setOnClickListener(listener);
binding.button1.setOnClickListener(listener);
binding.button2.setOnClickListener(listener);
binding.button3.setOnClickListener(listener);
binding.button4.setOnClickListener(listener);
binding.button5.setOnClickListener(listener);
binding.button6.setOnClickListener(listener);
binding.button7.setOnClickListener(listener);
binding.button8.setOnClickListener(listener);
binding.button9.setOnClickListener(listener);
binding.buttonClear.setOnClickListener(listener);
binding.buttonSubmit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(builder.length()!=0){
if (Integer.valueOf(builder.toString()).intValue() == myViewModel.getAnswer().getValue()) {
myViewModel.answerCorrect();
builder.setLength(0);
binding.textView9.setText(R.string.answer_correct_message);
//builder.append(getString(R.string.answer_correct_message));
} else {
NavController controller = Navigation.findNavController(view);
if (myViewModel.win_flag) {
controller.navigate(R.id.action_questionFragment_to_winFragment);
myViewModel.win_flag = (false);
myViewModel.save();
} else {
controller.navigate(R.id.action_questionFragment_to_loseFragment);
}
}
}else{
binding.textView9.setText("请输入你的答案");
}}
});
return binding.getRoot();
// Inflate the layout for this fragment
//return inflater.inflate(R.layout.fragment_question, container, false);
}
}
QuestionFragment.xml
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data>
<variable
name="data"
type="com.example.calculationtest.MyViewModel" />
</data>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".QuestionFragment">
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.1" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@{@string/current_score(data.currentScore)}"
app:layout_constraintBottom_toTopOf="@+id/guideline3"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline3"
tools:text="Score5" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.2" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.32" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.4" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.8" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.1" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.9" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="@dimen/big_front"
android:text="@{String.valueOf(data.leftNumber)}"
app:layout_constraintBottom_toBottomOf="@+id/textView5"
app:layout_constraintEnd_toStartOf="@+id/textView5"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="@+id/guideline8"
app:layout_constraintTop_toTopOf="@+id/textView5"
tools:text="8" />
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="@dimen/big_front"
android:text="@{data.operator}"
app:layout_constraintBottom_toBottomOf="@+id/textView6"
app:layout_constraintEnd_toStartOf="@+id/textView6"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/textView4"
app:layout_constraintTop_toTopOf="@+id/textView6"
tools:text="+" />
<TextView
android:id="@+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="@dimen/big_front"
android:text="@{String.valueOf(data.rightNumber)}"
app:layout_constraintBottom_toBottomOf="@+id/textView7"
app:layout_constraintEnd_toStartOf="@+id/textView7"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/textView5"
app:layout_constraintTop_toTopOf="@+id/textView7"
tools:text="9" />
<TextView
android:id="@+id/textView7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/equal_symbol"
android:textSize="@dimen/big_front"
app:layout_constraintBottom_toBottomOf="@+id/textView8"
app:layout_constraintEnd_toStartOf="@+id/textView8"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/textView6"
app:layout_constraintTop_toTopOf="@+id/textView8"
tools:text="=" />
<TextView
android:id="@+id/textView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/qusetion_mark"
android:textSize="@dimen/big_front"
app:layout_constraintBottom_toTopOf="@+id/guideline4"
app:layout_constraintEnd_toStartOf="@+id/guideline9"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/textView7"
app:layout_constraintTop_toTopOf="@+id/guideline4"
tools:text="\?" />
<TextView
android:id="@+id/textView9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/input_indicator"
android:textSize="@dimen/mid_front"
app:layout_constraintBottom_toTopOf="@+id/guideline5"
app:layout_constraintEnd_toStartOf="@+id/guideline9"
app:layout_constraintStart_toStartOf="@+id/guideline8"
app:layout_constraintTop_toTopOf="@+id/guideline5"
tools:text="Your Answer" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.5" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline11"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.6" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.7" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button3"
android:textSize="@dimen/button_font"
app:layout_constraintBottom_toBottomOf="@+id/button2"
app:layout_constraintEnd_toStartOf="@+id/guideline9"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/button2"
app:layout_constraintTop_toTopOf="@+id/button2"
app:layout_constraintVertical_bias="0.0" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button1"
android:textSize="@dimen/button_font"
app:layout_constraintBottom_toTopOf="@+id/guideline10"
app:layout_constraintEnd_toStartOf="@+id/button2"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="@+id/guideline8"
app:layout_constraintTop_toTopOf="@+id/guideline6" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button2"
android:textSize="@dimen/button_font"
app:layout_constraintBottom_toBottomOf="@+id/button1"
app:layout_constraintEnd_toStartOf="@+id/button3"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/button1"
app:layout_constraintTop_toTopOf="@+id/button1"
app:layout_constraintVertical_bias="0.0" />
<Button
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button4"
android:textSize="@dimen/button_font"
app:layout_constraintBottom_toTopOf="@+id/guideline11"
app:layout_constraintEnd_toStartOf="@+id/button5"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="@+id/guideline8"
app:layout_constraintTop_toTopOf="@+id/guideline10" />
<Button
android:id="@+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button5"
android:textSize="@dimen/button_font"
app:layout_constraintBottom_toBottomOf="@+id/button4"
app:layout_constraintEnd_toStartOf="@+id/button6"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/button4"
app:layout_constraintTop_toTopOf="@+id/button4" />
<Button
android:id="@+id/button6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button6"
android:textSize="@dimen/button_font"
app:layout_constraintBottom_toBottomOf="@+id/button5"
app:layout_constraintEnd_toStartOf="@+id/guideline9"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/button5"
app:layout_constraintTop_toTopOf="@+id/button5" />
<Button
android:id="@+id/button7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button7"
android:textSize="@dimen/button_font"
app:layout_constraintBottom_toTopOf="@+id/guideline12"
app:layout_constraintEnd_toStartOf="@+id/button8"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="@+id/guideline8"
app:layout_constraintTop_toTopOf="@+id/guideline11" />
<Button
android:id="@+id/button8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button8"
android:textSize="@dimen/button_font"
app:layout_constraintBottom_toBottomOf="@+id/button7"
app:layout_constraintEnd_toStartOf="@+id/button9"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/button7"
app:layout_constraintTop_toTopOf="@+id/button7" />
<Button
android:id="@+id/button9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button9"
android:textSize="@dimen/button_font"
app:layout_constraintBottom_toBottomOf="@+id/button8"
app:layout_constraintEnd_toStartOf="@+id/guideline9"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/button8"
app:layout_constraintTop_toTopOf="@+id/button8" />
<Button
android:id="@+id/button_clear"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button_clear"
android:textSize="@dimen/button_font"
app:layout_constraintBottom_toTopOf="@+id/guideline7"
app:layout_constraintEnd_toStartOf="@+id/button0"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="@+id/guideline8"
app:layout_constraintTop_toTopOf="@+id/guideline12" />
<Button
android:id="@+id/button0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button0"
android:textSize="@dimen/button_font"
app:layout_constraintBottom_toBottomOf="@+id/button_clear"
app:layout_constraintEnd_toStartOf="@+id/button_submit"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/button_clear"
app:layout_constraintTop_toTopOf="@+id/button_clear" />
<Button
android:id="@+id/button_submit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button_submit"
android:textSize="@dimen/button_font"
app:layout_constraintBottom_toBottomOf="@+id/button0"
app:layout_constraintEnd_toStartOf="@+id/guideline9"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/button0"
app:layout_constraintTop_toTopOf="@+id/button0" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
WinFragment
age com.example.calculationtest;
import android.os.Bundle;
import androidx.databinding.DataBindingUtil;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.SavedStateViewModelFactory;
import androidx.lifecycle.ViewModelProvider;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.calculationtest.databinding.FragmentWinBinding;
/**
* A simple {@link Fragment} subclass.
*/
public class WinFragment extends Fragment {
public WinFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, final ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
MyViewModel myViewModel=new ViewModelProvider(getActivity(),new SavedStateViewModelFactory(getActivity().getApplication(),this)).get(MyViewModel.class);
FragmentWinBinding binding;
binding= DataBindingUtil.inflate(inflater,R.layout.fragment_win,container,false);
binding.setData(myViewModel);
binding.setLifecycleOwner(requireActivity());
binding.button11.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
NavController controller= Navigation.findNavController(view);
controller.navigate(R.id.action_winFragment_to_titleFragment);
}
});
return binding.getRoot();
}
}
WinFragment.xml
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data>
<variable
name="data"
type="com.example.calculationtest.MyViewModel" />
</data>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".WinFragment">
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline16"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.45" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline17"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.1" />
<ImageView
android:id="@+id/imageView3"
android:layout_width="0dp"
android:layout_height="0dp"
android:src="@drawable/ic_sentiment_satisfied_black_24dp"
app:layout_constraintBottom_toTopOf="@+id/guideline16"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline17"
android:contentDescription="@string/win_image" />
<TextView
android:id="@+id/textView12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/win_message"
android:textSize="@dimen/huge_font"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline16"
app:layout_constraintVertical_bias="0.1" />
<TextView
android:id="@+id/textView13"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@{@string/win_score(data.highScore)}"
android:textSize="@dimen/huge_font"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline16"
app:layout_constraintVertical_bias="0.3"
tools:text="123" />
<Button
android:id="@+id/button11"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button_back"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline16"
app:layout_constraintVertical_bias="0.581" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
LoseFragment
package com.example.calculationtest;
import android.os.Bundle;
import androidx.databinding.DataBindingUtil;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.SavedStateViewModelFactory;
import androidx.lifecycle.ViewModelProvider;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.calculationtest.databinding.FragmentLoseBinding;
import com.example.calculationtest.databinding.FragmentWinBinding;
/**
* A simple {@link Fragment} subclass.
*/
public class LoseFragment extends Fragment {
public LoseFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, final ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
MyViewModel myViewModel;
myViewModel=new ViewModelProvider(getActivity(),new SavedStateViewModelFactory(getActivity().getApplication(),this)).get(MyViewModel.class);
FragmentLoseBinding binding;
binding= DataBindingUtil.inflate(inflater,R.layout.fragment_lose,container,false);
binding.setData(myViewModel);
binding.setLifecycleOwner(requireActivity());
binding.button10.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
NavController controller= Navigation.findNavController(view);
controller.navigate(R.id.action_loseFragment_to_titleFragment);
}
});
return binding.getRoot();
}
}
LoseFragment.xml
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data>
<variable
name="data"
type="com.example.calculationtest.MyViewModel" />
</data>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".LoseFragment">
<TextView
android:id="@+id/textView11"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@{@string/lose_score(data.currentScore)}"
android:textSize="@dimen/huge_font"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline14"
app:layout_constraintVertical_bias="0.3"
tools:text="231" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline13"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.1" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline14"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.45" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="0dp"
android:layout_height="0dp"
android:src="@drawable/ic_sentiment_dissatisfied_black_24dp"
app:layout_constraintBottom_toTopOf="@+id/guideline14"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline13"
android:contentDescription="@string/lose_image" />
<TextView
android:id="@+id/textView10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/lose_message"
android:textSize="@dimen/huge_font"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline14"
app:layout_constraintVertical_bias="0.1" />
<Button
android:id="@+id/button10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button_back"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline14"
app:layout_constraintVertical_bias="0.709" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
MyViewModel
package com.example.calculationtest;
import android.app.Application;
import android.content.Context;
import android.content.SharedPreferences;
import androidx.annotation.NonNull;
import androidx.lifecycle.AndroidViewModel;
import androidx.lifecycle.MutableLiveData;
import androidx.lifecycle.SavedStateHandle;
import java.util.Random;
public class MyViewModel extends AndroidViewModel {
private SavedStateHandle handle;
private static String KEY_HIGH_SCORE="key_high_score";
private static String KEY_LEFT_NUMBER="key_left_number";
private static String KEY_RIGHT_NUMBER="key_right_number";
private static String KEY_OPERATOR="key_operator";
private static String KEY_ANSWER="key_answer";
private static String SAVE_SHP_DATA_NAME="save_shp_data_name";
private static String KEY_CURRENT_SCORE="key_current_score";
boolean win_flag=false;
public MyViewModel(@NonNull Application application, SavedStateHandle handle) {
super(application);
if(!handle.contains(KEY_HIGH_SCORE)){
SharedPreferences shp=getApplication().getSharedPreferences(SAVE_SHP_DATA_NAME, Context.MODE_PRIVATE);
handle.set(KEY_HIGH_SCORE,shp.getInt(KEY_HIGH_SCORE,0));
handle.set(KEY_LEFT_NUMBER,0);
handle.set(KEY_RIGHT_NUMBER,0);
handle.set(KEY_OPERATOR,"+");
handle.set(KEY_ANSWER,0);
handle.set(KEY_CURRENT_SCORE,0);
}
this.handle=handle;
}
public MutableLiveData<Integer>getLeftNumber(){
return handle.getLiveData(KEY_LEFT_NUMBER);
}
public MutableLiveData<Integer>getRightNumber(){
return handle.getLiveData(KEY_RIGHT_NUMBER);
}
public MutableLiveData<String>getOperator(){
return handle.getLiveData(KEY_OPERATOR);
}
public MutableLiveData<Integer>getHighScore(){
return handle.getLiveData(KEY_HIGH_SCORE);
}
public MutableLiveData<Integer>getCurrentScore(){
return handle.getLiveData(KEY_CURRENT_SCORE);
}
public MutableLiveData<Integer>getAnswer(){
return handle.getLiveData(KEY_ANSWER);
}
void generator(){
int LEVEL=20;
Random random=new Random();
int x,y;
x=random.nextInt(LEVEL)+1;
y=random.nextInt(LEVEL)+1;
if(x%2==0){
getOperator().setValue("+");
if(x>y){
getAnswer().setValue(x);
getLeftNumber().setValue(y);
getRightNumber().setValue(x-y);
}else{
getAnswer().setValue(y);
getLeftNumber().setValue(x);
getRightNumber().setValue(y-x);
}
}else{
getOperator().setValue("-");
if(x>y){
getAnswer().setValue(x-y);
getLeftNumber().setValue(x);
getRightNumber().setValue(y);
}else{
getAnswer().setValue(y-x);
getLeftNumber().setValue(y);
getRightNumber().setValue(x);
}
}
}
void save(){
SharedPreferences shp=getApplication().getSharedPreferences(SAVE_SHP_DATA_NAME,Context.MODE_PRIVATE);
SharedPreferences.Editor editor=shp.edit();
editor.putInt(KEY_HIGH_SCORE,getHighScore().getValue());
editor.apply();
}
void answerCorrect(){
getCurrentScore().setValue(getCurrentScore().getValue()+1);
if(getCurrentScore().getValue()>getHighScore().getValue()){
getHighScore().setValue(getCurrentScore().getValue());
win_flag=true;
}
generator();
}
}
标签：builder,androidx,APP,binding,阶段,测试,import,public,view 来源： https://www.cnblogs.com/nian-nian/p/15790512.html