如何在 Android Studio 中更改参数时自动更新数据
How to automatically update data when parameters are altered in Android Studio
基本上，我制作了一个带有几个 EditText 的片段，用户可以在其中插入有关他自己的数据，例如体重、身高、年龄等。我还添加了一个 TextView，其中根据插入的数据显示那个人的基础代谢率，但问题是，每当我更改这个人的信息时，它不会自动更新。
我假设这是因为计算是在 onCreateView 方法内部进行的，因此如果我静态预插入相应的数据，它只会计算 BMR。
那么，我怎样才能做到，每当我更改某个变量（f.e 年龄）的值时，它也会自动重新计算该人的 BMR 值？
JAVA
public class home_fragment extends Fragment {
TextView genderSelector;
TextView activitySelector;
TextView goalSelector;
TextView metabolicRate;
EditText eHeight; String height;
EditText eWeight; String weight;
EditText eAge; String age;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_home_fragment, container, false);
activitySelector = (TextView) view.findViewById(R.id.tvActivitySelector);
genderSelector = (TextView) view.findViewById(R.id.tvGenderSelector);
goalSelector = (TextView) view.findViewById(R.id.tvGoalSelector);
metabolicRate = (TextView) view.findViewById(R.id.tvBasalMetabolicRateCalculator);
eHeight = (EditText) view.findViewById(R.id.etHeight);
eWeight = (EditText) view.findViewById(R.id.etWeight);
eAge = (EditText) view.findViewById(R.id.etAge);
eHeight.setText("181");
eWeight.setText("80");
eAge.setText("17");
genderSelector.setText("Female");
height = eHeight.getText().toString();
weight = eWeight.getText().toString();
age = eAge.getText().toString();
if (!height.equals(null) && !weight.equals(null) && !age.equals(null)) {
double h = Double.parseDouble(height);
double w = Double.parseDouble(weight);
double a = Double.parseDouble(age);
metabolicRate.setText(Double.toString(calculate(h, w, a, genderSelector)));
}
activitySelector.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(getActivity(), ActivityLevel.class);
startActivity(i);
}
});
goalSelector.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(getActivity(), Goal.class);
startActivity(i);
}
});
return view;
}
private double calculate(double h, double w, double a, TextView g) {
if (g.getText().toString().equals("Male")) {
return 5 + (10 * w) + (6.25 * h) - (5 * a);
} else {
return -161 + (10 * w) + (6.25 * h) - (5 * a);
}
}
}
XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".profile_fragment"
android:background="@color/lightgrey"
android:id="@+id/profile_frag">
<ScrollView
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<RelativeLayout
android:id="@+id/ProfileInformation"
android:layout_width="match_parent"
android:layout_height="45dp"
android:background="@color/grey">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Profile"
android:textColor="@color/textGray"
android:layout_alignParentBottom="true"
android:layout_marginLeft="13dp"
android:textSize="19dp"
android:layout_marginBottom="6dp"/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/HeightProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/ProfileInformation"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="120dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvHeight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Height (cm)"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
<EditText
android:id="@+id/etHeight"
android:layout_width="wrap_content"
android:layout_height="18dp"
android:layout_centerVertical="true"
android:hint="cm"
android:textColor="@color/white"
android:layout_alignParentRight="true"
android:textColorHint="@color/textGray"
android:textSize="18dp"
android:cursorVisible="true"
android:background="@color/lightblack"
android:textCursorDrawable="@null"
android:layout_marginRight="10dp"
android:gravity="right"
/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/WeightProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/HeightProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="120dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvWeight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Weight (kg)"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
<EditText
android:id="@+id/etWeight"
android:layout_width="wrap_content"
android:layout_height="18dp"
android:layout_centerVertical="true"
android:hint="kg"
android:textColor="@color/white"
android:layout_alignParentRight="true"
android:textColorHint="@color/textGray"
android:textSize="18dp"
android:cursorVisible="true"
android:background="@color/lightblack"
android:textCursorDrawable="@null"
android:layout_marginRight="10dp"
android:gravity="right"
/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/GenderProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/WeightProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="80dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvGender"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Gender"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
<TextView
android:id="@+id/tvGenderSelector"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Male"
android:textSize="18dp"
android:textColor="@color/white"
android:layout_marginRight="10dp"
android:layout_alignParentRight="true"
/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/AgeProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/GenderProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="60dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvAge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Age"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
<EditText
android:id="@+id/etAge"
android:layout_width="wrap_content"
android:layout_height="18dp"
android:layout_centerVertical="true"
android:hint="years"
android:textColor="@color/white"
android:layout_alignParentRight="true"
android:textColorHint="@color/textGray"
android:textSize="18dp"
android:cursorVisible="true"
android:background="@color/lightblack"
android:textCursorDrawable="@null"
android:layout_marginRight="10dp"
android:gravity="right"
/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/ActivityProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/AgeProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="90dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvActivity"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Activity"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
<TextView
android:id="@+id/tvActivitySelector"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Moderate"
android:layout_alignParentRight="true"
android:textColor="@color/white"
android:layout_centerVertical="true"
android:textSize="18dp"
android:layout_marginRight="10dp">
</TextView>
</RelativeLayout>
<RelativeLayout
android:id="@+id/GoalProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/ActivityProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="80dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvGoal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Goal"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
<TextView
android:id="@+id/tvGoalSelector"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Lose weight"
android:layout_alignParentRight="true"
android:textColor="@color/white"
android:layout_centerVertical="true"
android:textSize="18dp"
android:layout_marginRight="10dp">
</TextView>
</RelativeLayout>
<RelativeLayout
android:id="@+id/CustomizeMealsProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/GoalProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="150dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Customize meals"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:id="@+id/ResultInformation"
android:layout_width="match_parent"
android:layout_height="45dp"
android:layout_below="@id/CustomizeMealsProfile"
android:background="@color/grey">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Results"
android:textColor="@color/textGray"
android:layout_alignParentBottom="true"
android:layout_marginLeft="13dp"
android:textSize="19dp"
android:layout_marginBottom="6dp"/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/BasalMetabolicRateProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/ResultInformation"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="190dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvBasalMetabolicRate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Basal Metabolic Rate"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
<TextView
android:id="@+id/tvBasalMetabolicRateCalculator"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:text="kcal"
android:textColor="@color/white"
android:layout_centerVertical="true"
android:textSize="18dp"
android:layout_marginRight="10dp"/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/BodyMassIndexProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/BasalMetabolicRateProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="190dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvBodyMassIndex"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Body Mass Index"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:id="@+id/WaterRequirementProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/BodyMassIndexProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="210dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvWaterRequirement"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Water Requirement (ml)"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:id="@+id/DailyCaloricRequirementProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/WaterRequirementProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="230dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvCaloricRequirement"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Daily Caloric Requirement"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
</RelativeLayout>
</RelativeLayout>
</ScrollView>
</RelativeLayout>
您可以为 EditText 使用 TextWatcher。
当用户在 editText 中更改文本然后重新计算时
yourEditText.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable s) {}
@Override
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start,
int before, int count) {
}
});
基本上，我制作了一个带有几个 EditText 的片段，用户可以在其中插入有关他自己的数据，例如体重、身高、年龄等。我还添加了一个 TextView，其中根据插入的数据显示那个人的基础代谢率，但问题是，每当我更改这个人的信息时，它不会自动更新。
我假设这是因为计算是在 onCreateView 方法内部进行的，因此如果我静态预插入相应的数据，它只会计算 BMR。
那么，我怎样才能做到，每当我更改某个变量（f.e 年龄）的值时，它也会自动重新计算该人的 BMR 值？
JAVA
public class home_fragment extends Fragment {
TextView genderSelector;
TextView activitySelector;
TextView goalSelector;
TextView metabolicRate;
EditText eHeight; String height;
EditText eWeight; String weight;
EditText eAge; String age;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_home_fragment, container, false);
activitySelector = (TextView) view.findViewById(R.id.tvActivitySelector);
genderSelector = (TextView) view.findViewById(R.id.tvGenderSelector);
goalSelector = (TextView) view.findViewById(R.id.tvGoalSelector);
metabolicRate = (TextView) view.findViewById(R.id.tvBasalMetabolicRateCalculator);
eHeight = (EditText) view.findViewById(R.id.etHeight);
eWeight = (EditText) view.findViewById(R.id.etWeight);
eAge = (EditText) view.findViewById(R.id.etAge);
eHeight.setText("181");
eWeight.setText("80");
eAge.setText("17");
genderSelector.setText("Female");
height = eHeight.getText().toString();
weight = eWeight.getText().toString();
age = eAge.getText().toString();
if (!height.equals(null) && !weight.equals(null) && !age.equals(null)) {
double h = Double.parseDouble(height);
double w = Double.parseDouble(weight);
double a = Double.parseDouble(age);
metabolicRate.setText(Double.toString(calculate(h, w, a, genderSelector)));
}
activitySelector.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(getActivity(), ActivityLevel.class);
startActivity(i);
}
});
goalSelector.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(getActivity(), Goal.class);
startActivity(i);
}
});
return view;
}
private double calculate(double h, double w, double a, TextView g) {
if (g.getText().toString().equals("Male")) {
return 5 + (10 * w) + (6.25 * h) - (5 * a);
} else {
return -161 + (10 * w) + (6.25 * h) - (5 * a);
}
}
}
XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".profile_fragment"
android:background="@color/lightgrey"
android:id="@+id/profile_frag">
<ScrollView
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<RelativeLayout
android:id="@+id/ProfileInformation"
android:layout_width="match_parent"
android:layout_height="45dp"
android:background="@color/grey">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Profile"
android:textColor="@color/textGray"
android:layout_alignParentBottom="true"
android:layout_marginLeft="13dp"
android:textSize="19dp"
android:layout_marginBottom="6dp"/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/HeightProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/ProfileInformation"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="120dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvHeight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Height (cm)"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
<EditText
android:id="@+id/etHeight"
android:layout_width="wrap_content"
android:layout_height="18dp"
android:layout_centerVertical="true"
android:hint="cm"
android:textColor="@color/white"
android:layout_alignParentRight="true"
android:textColorHint="@color/textGray"
android:textSize="18dp"
android:cursorVisible="true"
android:background="@color/lightblack"
android:textCursorDrawable="@null"
android:layout_marginRight="10dp"
android:gravity="right"
/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/WeightProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/HeightProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="120dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvWeight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Weight (kg)"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
<EditText
android:id="@+id/etWeight"
android:layout_width="wrap_content"
android:layout_height="18dp"
android:layout_centerVertical="true"
android:hint="kg"
android:textColor="@color/white"
android:layout_alignParentRight="true"
android:textColorHint="@color/textGray"
android:textSize="18dp"
android:cursorVisible="true"
android:background="@color/lightblack"
android:textCursorDrawable="@null"
android:layout_marginRight="10dp"
android:gravity="right"
/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/GenderProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/WeightProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="80dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvGender"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Gender"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
<TextView
android:id="@+id/tvGenderSelector"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Male"
android:textSize="18dp"
android:textColor="@color/white"
android:layout_marginRight="10dp"
android:layout_alignParentRight="true"
/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/AgeProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/GenderProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="60dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvAge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Age"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
<EditText
android:id="@+id/etAge"
android:layout_width="wrap_content"
android:layout_height="18dp"
android:layout_centerVertical="true"
android:hint="years"
android:textColor="@color/white"
android:layout_alignParentRight="true"
android:textColorHint="@color/textGray"
android:textSize="18dp"
android:cursorVisible="true"
android:background="@color/lightblack"
android:textCursorDrawable="@null"
android:layout_marginRight="10dp"
android:gravity="right"
/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/ActivityProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/AgeProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="90dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvActivity"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Activity"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
<TextView
android:id="@+id/tvActivitySelector"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Moderate"
android:layout_alignParentRight="true"
android:textColor="@color/white"
android:layout_centerVertical="true"
android:textSize="18dp"
android:layout_marginRight="10dp">
</TextView>
</RelativeLayout>
<RelativeLayout
android:id="@+id/GoalProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/ActivityProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="80dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvGoal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Goal"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
<TextView
android:id="@+id/tvGoalSelector"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Lose weight"
android:layout_alignParentRight="true"
android:textColor="@color/white"
android:layout_centerVertical="true"
android:textSize="18dp"
android:layout_marginRight="10dp">
</TextView>
</RelativeLayout>
<RelativeLayout
android:id="@+id/CustomizeMealsProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/GoalProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="150dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Customize meals"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:id="@+id/ResultInformation"
android:layout_width="match_parent"
android:layout_height="45dp"
android:layout_below="@id/CustomizeMealsProfile"
android:background="@color/grey">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Results"
android:textColor="@color/textGray"
android:layout_alignParentBottom="true"
android:layout_marginLeft="13dp"
android:textSize="19dp"
android:layout_marginBottom="6dp"/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/BasalMetabolicRateProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/ResultInformation"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="190dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvBasalMetabolicRate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Basal Metabolic Rate"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
<TextView
android:id="@+id/tvBasalMetabolicRateCalculator"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:text="kcal"
android:textColor="@color/white"
android:layout_centerVertical="true"
android:textSize="18dp"
android:layout_marginRight="10dp"/>
</RelativeLayout>
<RelativeLayout
android:id="@+id/BodyMassIndexProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/BasalMetabolicRateProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="190dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvBodyMassIndex"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Body Mass Index"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:id="@+id/WaterRequirementProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/BodyMassIndexProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="210dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvWaterRequirement"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Water Requirement (ml)"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:id="@+id/DailyCaloricRequirementProfile"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@id/WaterRequirementProfile"
android:background="@color/lightblack"
android:layout_marginTop="1dp"
>
<RelativeLayout
android:layout_width="230dp"
android:layout_height="match_parent"
android:elevation="1dp"
android:background="@color/lightblack"
>
<TextView
android:id="@+id/tvCaloricRequirement"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Daily Caloric Requirement"
android:textColor="@color/textGray"
android:layout_marginLeft="13dp"
/>
</RelativeLayout>
</RelativeLayout>
</RelativeLayout>
</ScrollView>
</RelativeLayout>
您可以为 EditText 使用 TextWatcher。 当用户在 editText 中更改文本然后重新计算时
yourEditText.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable s) {}
@Override
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start,
int before, int count) {
}
});