Question

我遇到了一个问题：当我尝试在我的设备中调试我的应用时，它会在启动后立即关闭它。

以下是代码：

public class Main extends AppCompatActivity {
    EditText convFromET, convToET, commaNumbET;
    Spinner  selectCatS, convFromS, convToS;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        convFromET = (EditText)findViewById(R.id.input_convert_from);
        convToET = (EditText)findViewById(R.id.input_convert_to);
        commaNumbET = (EditText)findViewById(R.id.input_comma_numbers);

        selectCatS = (Spinner)findViewById(R.id.spinner_select_category);
        convFromS = (Spinner)findViewById(R.id.spinner_convert_from);
        convToS = (Spinner)findViewById(R.id.spinner_convert_to);

        SetSelectCatSOnClickListener( );


    }

    private void SetSelectCatSOnClickListener( ){
        selectCatS.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                ArrayAdapter<CharSequence> adapter;

                switch( position ) {
                    case 0: // length
                        adapter = ArrayAdapter.createFromResource(getApplicationContext(), R.array.spinner_length, android.R.layout.simple_spinner_item);
                        break;

                    case 1: // speed
                        adapter = ArrayAdapter.createFromResource(getApplicationContext(), R.array.spinner_speed, android.R.layout.simple_spinner_item );
                        break;

                    case 2: //tempreture
                        adapter = ArrayAdapter.createFromResource(getApplicationContext(), R.array.spinner_tempreture, android.R.layout.simple_spinner_item );
                        break;

                    case 3: // volume
                        adapter = ArrayAdapter.createFromResource( getApplicationContext(), R.array.spinner_volume, android.R.layout.simple_spinner_item );
                        break;

                    default: // Weigth
                        adapter = ArrayAdapter.createFromResource( getApplicationContext(), R.array.spinner_weigth, android.R.layout.simple_spinner_item );
                        break;
                }

                adapter.setDropDownViewResource( android.R.layout.simple_spinner_dropdown_item );
                convFromS.setAdapter( adapter );
                convToS.setAdapter( adapter );
            }
        });
    }
}

这是XML文件（strings.xml）：

<string name="select_category">Choose a category</string>
<string name="convert_from">Convert from</string>
<string name="convert_to">Convert to</string>
<string name="numbers_after_comma">Numbers after comma</string>

<string-array name="spinner_categories">
    <item>Length</item>
    <item>Weigth</item>
    <item>Volume</item>
    <item>Tempreture</item>
    <item>Speed</item>
    <item>Volume</item>
</string-array>

<string-array name="spinner_length">
    <item>Inches</item>
    <item>Feets</item>
    <item>Centimeters</item>
    <item>Meters</item>
    <item>Kilometers</item>
</string-array>

<string-array name="spinner_speed">
    <item>Meters per second</item>
    <item>Kilometers per hour</item>
    <item>Miles per hour</item>
</string-array>

<string-array name="spinner_tempreture">
    <item>Celsius</item>
    <item>Farenheith</item>
    <item>Kelvin</item>
</string-array>

<string-array name="spinner_volume">
    <item>Cubic milimeters</item>
    <item>Cubic centimeters</item>
    <item>Cubic meters</item>
    <item>Liters</item>
</string-array>

<string-array name="spinner_weigth">
    <item>Miligrams</item>
    <item>Grams</item>
    <item>Kilograms</item>
    <item>Pounds</item>
    <item>Tons</item>
</string-array>

顺便说一下，当我在SetSelectCatSOnClickListener()中评论onCreate时，应用程序不会崩溃，因此我认为问题必定存在。

提前致谢！

Answer 1

它不是OnItemClick它应该是微调器的onItemSelected

Answer 2

使用logcat 查找错误的具体信息。

关于日食：

转到窗口 - ＆gt;显示视图 - ＆gt; Android - ＆gt; logcat中。

然后将Logcat固定在屏幕的底部。

您会看到一个下拉列表默认为详细。将其更改为错误。现在，您只会在Logcat中看到错误。

如果您在此处发布错误，我相信我们可以为您提供帮助。

Android App在启动时关闭

2 个答案: