Question

    public class ListViewActivity extends AppCompatActivity

    {
        ListView lv;

        String[] ListItems={"AutoCompleteTextViewActivity","CheckboxActivity","EditTextActivity","ListViewActivity","ProgressBarActivity","RadioButtonActivity","RatingBar2Activity","RatngBarActivity","SeekBarActivity","SpinnerActivity","SwitchActivity","TextViewActivity"};

        @Override
        protected void onCreate(Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_list_view);
            lv=(ListView)findViewById(R.id.listView1);
            ArrayAdapter ad=new ArrayAdapter(ListViewActivity.this,android.R.layout.simple_list_item_1,ListItems);
            lv.setAdapter(ad);

            lv.setOnItemClickListener(new AdapterView.OnItemClickListener()
            {
                @Override
                public void onItemClick(AdapterView<?> parent, View view, int position, long id)
                {
                    Intent i = new Intent(ListViewActivity.this, ListItems[position].getClass());
                    startActivity(i);
                }
            });
        }
    }

我正在学习android studio.i制作了一个应用程序，我可以通过它从listview widget中选择它们来打开我以前创建的应用程序。它在意图行中显示错误。请告诉我我在哪里有出了问题。

我的宣言文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.user.re1">

    <application
        android:allowBackup="true"
        android:banner="@mipmap/ic_launcher_round"
        android:icon="@mipmap/ic_launcher_round"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".TextViewActivity" />
        <activity android:name=".EditTextActivity" />
        <activity android:name=".RadioButtonActivity" />
        <activity android:name=".CheckboxActivity" />
        <activity android:name=".RatngBarActivity" />
        <activity android:name=".RatingBar2Activity" />
        <activity android:name=".ProgressBarActivity" />
        <activity android:name=".SeekBarActivity" />
        <activity android:name=".SwitchActivity" />
        <activity android:name=".SpinnerActivity"/>
        <activity android:name=".AutoCompleteTextViewActivity">

        </activity>
        <activity android:name=".ListViewActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Answer 1

将您的活动名称添加到清单文件

<activity android:name=".ListViewActivity"></activity>

android.content.ActivityNotFoundException：无法找到显式活动类

1 个答案: