Question

我需要帮助的第一个变量是totalTxt。此变量保存用户在先前类别中输入的所有金额的值。此变量应显示在“您的总支出为：”旁边。我需要帮助的第二个变量是still2。此变量保存用户目标的值并从中减去totalTxt。它应显示在“您需要保存：”旁边。我是如何实现ScrollView的呢？我尝试将其添加到布局中，但在模拟器上我无法滚动，因此“你需要保存：”被切断了。下面是我的代码...请帮助。

公共类MainActivity扩展了Activity实现OnClickListener {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.home);

    Button calculate = (Button) findViewById(R.id.calculate);
    calculate.setOnClickListener(this);
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}
@Override
public void onClick(View v) {
    EditText goal = (EditText) findViewById (R.id.GoalText);
    double goalTxt = Double.parseDouble(goal.getText().toString());
    EditText groceries = (EditText) findViewById (R.id.GroceriesText);
    double groceriesTxt = Double.parseDouble(groceries.getText().toString());
    EditText rent = (EditText) findViewById (R.id.RentText);
    double rentTxt = Double.parseDouble(rent.getText().toString());
    EditText utilities = (EditText) findViewById (R.id.UtilitiesText);
    double utilitiesTxt = Double.parseDouble(utilities.getText().toString());
    EditText clothingshoesetc = (EditText) findViewById (R.id.ClothingShoesEtcText);
    double clothingshoesetcTxt = Double.parseDouble(clothingshoesetc.getText().toString());
    EditText entertainmentdiningetc = (EditText) findViewById (R.id.EntertainmentDiningEtcText);
    double entertainmentdiningetcTxt = Double.parseDouble(entertainmentdiningetc.getText().toString());
    EditText transportationcabtraingas = (EditText) findViewById (R.id.TransportationCabTrainGasText);
    double transportationcabtraingasTxt = Double.parseDouble(transportationcabtraingas.getText().toString());
    EditText others = (EditText) findViewById (R.id.OthersText);
    double othersTxt = Double.parseDouble(others.getText().toString());




    EditText total = (EditText) findViewById (R.id.YourTotalSpendingText);
    double totalTxt = groceriesTxt + rentTxt + utilitiesTxt + clothingshoesetcTxt + 
            entertainmentdiningetcTxt + transportationcabtraingasTxt + othersTxt; 
    Toast.makeText(getApplicationContext(), Double.toString(totalTxt), Toast.LENGTH_LONG).show();
    EditText still2= (EditText) findViewById (R.id.YouNeedToSaveText); 
    double still = goalTxt - totalTxt; 
    Toast.makeText (getApplicationContext (), Double.toString(still), Toast.LENGTH_LONG).show();
       if (still < 0){
     String stop =  ("STOP SPENDING SO MUCH MONEY!");
     Toast.makeText(getApplicationContext(), (stop), Toast.LENGTH_LONG).show(); }
       if (still > 0) { 
      String go = ("Keep going! Piggy B. believes in you!"); 
      Toast.makeText(getApplicationContext(), (go), Toast.LENGTH_LONG).show(); }

   }

}

Answer 1

在你的布局xml中，我猜测你有一个围绕EditTexts集合的LinearLayout（或一些布局）。

在布局xml文件中添加围绕LinearLayout的ScrollView。类似的东西：

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

  <LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <EditText
        android:id="@+id/GoalText"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    other edit text tags here

  </LinearLayout>

</ScrollView>

添加ScrollView使用户可以滚动屏幕（如果视图大于屏幕）。

我是Android App开发的新手，我需要在指定区域打印两个变量。

1 个答案: