错误：android.content.res.Resources$NotFoundException：字符串资源 ID #0x1

Question

每次我点击 onClickCreateButton 我都会得到这个回报： android.content.res.Resources$NotFoundException: String resource ID #0x1

主要活动class如下：

public class MainActivity extends AppCompatActivity {
    EditText mInput;
    RelativeLayout.LayoutParams layoutParams;
    LinearLayout linearLayout2;
    LinearLayout linearLayout3;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mInput = findViewById(R.id.EditText);
        linearLayout2 = findViewById(R.id.LinearLayout2);
        layoutParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
        linearLayout3 = new LinearLayout(this);
        linearLayout3.setLayoutParams(layoutParams);
        linearLayout3.setOrientation(LinearLayout.HORIZONTAL);
        linearLayout2.addView(linearLayout3);
    }

    public void onClickCreateButton(View v) {
        LinearLayout temp;
        try {
            Toast.makeText(getApplicationContext(), linearLayout2.getChildCount(), Toast.LENGTH_SHORT).show();
            if (linearLayout2.getChildCount() <= 8) {
                temp = (LinearLayout) linearLayout2.getChildAt(linearLayout2.getChildCount());
                Toast.makeText(getApplicationContext(), temp.getChildCount(), Toast.LENGTH_SHORT).show();
                if (temp.getChildCount() <= 3) {
                    Button button = new Button(this);
                    button.setText(mInput.getText().toString());
                    button.setLayoutParams(layoutParams);
                    linearLayout3.addView(button);
                } else {
                    linearLayout3 = new LinearLayout(this);
                    linearLayout3.setLayoutParams(layoutParams);
                    linearLayout3.setOrientation(LinearLayout.HORIZONTAL);
                    linearLayout2.addView(linearLayout3);
                }
            }
        } catch (Exception ex)
        {
            Toast.makeText(getApplicationContext(), ex+"", Toast.LENGTH_SHORT).show();
        }
    }

活动主：

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal">

        <LinearLayout
            android:id="@+id/LinearLayout2"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical" />
    </LinearLayout>

如果有人可以指出我的代码中的错误，那将有很大帮助。 谢谢！ 干杯!

Answer 1

 Toast.makeText(getApplicationContext(), temp.getChildCount(), Toast.LENGTH_SHORT).show();

temp.getChildCount()返回一个int和Toast.makeText()重载，它接受一个int参数，期望它是一个资源 id。 通过将int转换为字符串来使用String重载，例如

Toast.makeText(getApplicationContext(), "" + temp.getChildCount(), Toast.LENGTH_SHORT).show();

另一个Toast有同样的问题。

Answer 2

您试图通过调用采用资源 ID 的Toast.makeText版本来显示一个数字：

Toast.makeText(getApplicationContext(), temp.getChildCount(), Toast.LENGTH_SHORT).show();

您应该将其转换为字符串：

Toast.makeText(getApplicationContext(), Integer.toString(temp.getChildCount()), Toast.LENGTH_SHORT).show();