Question

遇到weatherapp项目的问题。要求是：

为＆＃34;现在＆＃34;设计用户体验和/或将来3天
设计变量的Java代码（现在是硬代码）

将java值连接到UX，以便在页面上显示您使用Java编码的内容。我的代码如下：

public class MainActivity extends AppCompatActivity {//start class

int now = 45;
int todayHigh = 56;
int todayLow = 40;
int tomHigh = 70;
int tomLow = 40;
int thurHigh = 45;
int thurLow = 42;




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

private void displayNow(int now)
{
    TextView quantityTextView = (TextView) findViewById(R.id.now);
    quantityTextView.setText(now);
}

和xml文件看起来像

        <TextView
            android:id="@+id/now"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="16dp"
            android:textSize="20sp"
            android:text="Now: "/>
        <TextView
            android:id="@+id/today"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="16dp"
            android:textSize="20sp"
            android:text="Today: "/>
        <TextView
            android:id="@+id/tomorrow"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="16dp"
            android:textSize="20sp"
            android:text="Tomorrow: "/>
        <TextView
            android:id="@+id/thursday"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="16dp"
            android:textSize="20sp"
            android:text="Thursday: "/>
</LinearLayout>

基本上我试图让我现在拥有的变量（int now = 45）显示在文本视图的旁边，我标记为＆＃34; now＆＃34;当我运行应用程序，但没有任何显示。谢谢你的帮助！

Answer 1

在OnCreate（）内部调用displayNow

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        displayNow(now);
    }

Answer 2

public class MainActivity extends AppCompatActivity {//start class

int now;
int todayHigh;
int todayLow;
int tomHigh;
int tomLow;
int thurHigh;
int thurLow;




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

      now = 45;
      todayHigh = 56;
      todayLow = 40;
      tomHigh = 70;
      tomLow = 40;
      thurHigh = 45;
       thurLow = 42;

    TextView quantityTextView = (TextView)    findViewById(R.id.now);
   displayNow(int now)

}

private void displayNow(int nowInt)
{
    quantityTextView.setText(nowInt);
}}

如何在我的java文件中获取变量并将其连接到XML文件

2 个答案: