Question

我是android开发的新手。我有10个不同的按钮，我想为每个按钮显示一个祝酒词。该消息类似于：

“这是按钮：” + numButton

其中numButton是传递给函数的道具。这是功能代码：

public void displayMensaje(View v) {
        Toast.makeText(ActividadUno.this, "Test", Toast.LENGTH_SHORT).show();
    }

这是xml：

<Button
        android:id="@+id/button11"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="30dp"
        android:layout_marginLeft="30dp"
        android:layout_marginTop="400dp"
        android:text="churro"
        android:onClick="displayMensaje"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

Answer 1

您可以将View中的Button强制转换为按钮文本。

类似的东西：

public void displayMensaje(View v) {
    Button button = (Button) v;
    String title = button.getText();
    String message = "Test " + title;
    Toast.makeText(ActividadUno.this, message, Toast.LENGTH_SHORT).show();
}

修改：
根据我对以下评论的理解，您的活动中有多个按钮，并且您希望在单击不同按钮时显示不同的值。

您可以拥有一个Map，其中按键作为按钮标题，值作为营养值。

以下是如何实现此目标的一般示例：

public class MyActivity extends Activity {
    // Your Message Format
    private static final String MSG_FORMAT = "Item Name: %s\n"
            + "Fat: %s\n"
            + "Protein: %s\n"
            + "Calories: %s";

    // A Map to hold info of all items
    // Key = button title
    // Value = Array containing item info
    private Map<String, String[]> info = new HashMap();

    // Assuming you have 3 buttons in your activity
    private Button btnMilk;
    private Button btnEggs;
    private Button btnChicken;

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

        btnMilk = (Button) findViewById(R.id.btn_milk);
        btnEggs = (Button) findViewById(R.id.btn_eggs);
        btnChicken = (Button) findViewById(R.id.btn_chicken);

        // 0 = Fat, 1 = Protein, 2 = Calories
        String[] milkInfo = new String[]{"12", "20", "125"};
        String[] eggsInfo = new String[]{"10", "50", "205"};
        String[] chickenInfo = new String[]{"50", "5", "500"};

        // load your Map with the data
        info.put(btnMilk.getText(), milkInfo);
        info.put(btnEggs.getText(), eggsInfo);
        info.put(btnChicken.getText(), chickenInfo);

    }

    public void displayMessage(View v) {
        Button button = (Button) v;

        String title = button.getText();

        // Get item info from your Map
        String[] itemInfo = info.get(title);

        // Create message using the format and values from the array
        String message = String.format(MSG_FORMAT, title, itemInfo[0], itemInfo[1], itemInfo[2]);

        Toast.makeText(MyActivity.this, message, Toast.LENGTH_SHORT).show();
    }
}

希望这会有所帮助

根据参数显示不同的消息

1 个答案: