如何通过字符串数组 android 将自定义 listView 项目扩展到超过 10 个项目？

Question

I want to create custom list more than 10 elements. When I fill an String array more than 10 elements and click the 11th item then app isn't run.

public class MainActivity extends Activity {
    ListView listView;
    int position=0;
    String[]items={"ab","cd","ef","gh","jk","lm","no","pr","st","uv","wx"};
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        listView = (ListView) findViewById(R.id.lv_country);
        ArrayAdapter<String>arrayAdapter=new ArrayAdapter<String>(this,R.layout.custom_list,items);
        listView.setAdapter(arrayAdapter);

        listView.setOnItemClickListener(new OnItemClickListener(){
        @Override
        public void onItemClick(AdapterView<?> p1, View p2, int p3, long p4)
                {
                Intent intent;
                position=p3;
                switch(p3){
                    case 0:
                        intent=new Intent(MainActivity.this,Hi.class);
                        startActivity(intent);
                    case 1:
                        intent=new Intent(MainActivity.this,Ba.class);
                        startActivity(intent);
                        break;
                    case 2:
                        intent=new Intent(MainActivity.this,Dc.class);
                        startActivity(intent);
                        break;
                    case 3:
                        intent=new Intent(MainActivity.this,Fe.class);
                        startActivity(intent);
                        break;
                    case 4:
                        intent=new Intent(MainActivity.this,Hg.class);
                        startActivity(intent);
                        break;
                    case 5:
                        intent=new Intent(MainActivity.this,Kj.class);
                        startActivity(intent);
                        break;
                    case 6:
                        intent=new Intent(MainActivity.this,Ml.class);
                        startActivity(intent);
                        break;
                    case 7:
                        intent=new Intent(MainActivity.this,On.class);
                        startActivity(intent);
                        break;
                    case 8:
                        intent=new Intent(MainActivity.this,Rp.class);
                        startActivity(intent);
                        break;
                    case 9:
                        intent=new Intent(MainActivity.this,Ts.class);
                        startActivity(intent);
                        break;
                    case 10:
                        intent=new Intent(MainActivity.this, Spinner_Activity.class);
                        startActivity(intent);

                    }
                }

    });
}
}

at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4196) 05-18 09:49:57.933 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4169) 05-18 09:49:57.933 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6743) 05-18 09:49:57.933 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6717) 05-18 09:49:57.933 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6663) 05-18 09:49:57.933 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6846) 05-18 09:49:57.933 14335 14335 E AndroidRuntime
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:186) 05-18 09:49:57.933 14335 14335 E AndroidRuntime
at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method) 05-18 09:49:57.933 14335 14335 E AndroidRuntime
at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:177) 05-18 09:49:57.933 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:6817) 05-18 09:49:57.933 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:6869) 05-18 09:49:57.934 14335 14335 E AndroidRuntime
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:966) 05-18 09:49:57.934 14335 14335 E AndroidRuntime
at android.view.Choreographer.doCallbacks(Choreographer.java:778) 05-18 09:49:57.934 14335 14335 E AndroidRuntime
at android.view.Choreographer.doFrame(Choreographer.java:707) 05-18 09:49:57.934 14335 14335 E AndroidRuntime
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:952) 05-18 09:49:57.934 14335 14335 E AndroidRuntime
at android.os.Handler.handleCallback(Handler.java:789) 05-18 09:49:57.934 14335 14335 E AndroidRuntime
at android.os.Handler.dispatchMessage(Handler.java:98) 05-18 09:49:57.934 14335 14335 E AndroidRuntime
at android.os.Looper.loop(Looper.java:164) 05-18 09:49:57.934 14335 14335 E AndroidRuntime at android.app.ActivityThread.main(ActivityThread.java:6809) 05-18 09:49:57.934 14335 14335 E AndroidRuntime
at java.lang.reflect.Method.invoke(Native Method) 05-18 09:49:57.934 14335 14335 E AndroidRuntime at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 05-18 09:49:57.934 14335 14335 E AndroidRuntime
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
FATAL EXCEPTION: main 05-18 09:49:57.940 14335 14335 E
AndroidRuntime Process: com.mycompany.myapp, PID: 14335 05-18 09:49:57.940 14335 14335 E
AndroidRuntime
android.content.ActivityNotFoundException: Unable to find explicit activity class {com.mycompany.myapp/com.mycompany.myapp.Spinner_Activity}; have you declared this activity in your AndroidManifest.xml? 05-18 09:49:57.940 14335 14335 E AndroidRuntime at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:2123) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1801) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.app.Activity.startActivityForResult(Activity.java:4495) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.app.Activity.startActivityForResult(Activity.java:4453) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.app.Activity.startActivity(Activity.java:4814) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.app.Activity.startActivity(Activity.java:4782) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at com.mycompany.myapp.List_Widgets0000000.onItemClick(List_Widgets.java:75) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.widget.AdapterView.performItemClick(AdapterView.java:318) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.widget.AbsListView.performItemClick(AbsListView.java:1197) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.widget.AbsListView$PerformClick.run(AbsListView.java:3166) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.widget.AbsListView.onTouchUp(AbsListView.java:4131) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.widget.AbsListView.onTouchEvent(AbsListView.java:3878) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.View.dispatchTouchEvent(View.java:11776) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2959) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2636) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2965) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2965) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2965) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2965) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2650) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:446) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1848) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.app.Activity.dispatchTouchEvent(Activity.java:3315) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:408) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.View.dispatchPointerEvent(View.java:12015) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4855) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4638) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4169) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4222) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4188) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4315) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4196) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4372) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4169) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4222) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4188) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4196) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4169) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6743) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6717) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6663) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6846) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:186) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:177) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:6817) 05-18 09:49:57.940 14335 14335 E AndroidRuntime
at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:6869) 05-18 09:49:57.941 14335 14335 E AndroidRuntime
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:966) 05-18 09:49:57.941 14335 14335 E AndroidRuntime
at android.view.Choreographer.doCallbacks(Choreographer.java:778) 05-18 09:49:57.941 14335 14335 E AndroidRuntime
at android.view.Choreographer.doFrame(Choreographer.java:707) 05-18 09:49:57.941 14335 14335 E AndroidRuntime
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:952) 05-18 09:49:57.941 14335 14335 E AndroidRuntime
at android.os.Handler.handleCallback(Handler.java:789) 05-18 09:49:57.941 14335 14335 E AndroidRuntime
at android.os.Handler.dispatchMessage(Handler.java:98) 05-18 09:49:57.941 14335 14335 E AndroidRuntime
at android.os.Looper.loop(Looper.java:164) 05-18 09:49:57.941 14335 14335 E AndroidRuntime at android.app.ActivityThread.main(ActivityThread.java:6809) 05-18 09:49:57.941 14335 14335 E AndroidRuntime
at java.lang.reflect.Method.invoke(Native Method) 05-18 09:49:57.941 14335 14335 E AndroidRuntime at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 05-18 09:49:57.941 14335 14335 E AndroidRuntime
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
FATAL EXCEPTION: main 05-18 12:10:59.002 29469 29469 E
AndroidRuntime Process: com.mycompany.myapp, PID: 29469 05-18 12:10:59.002 29469 29469 E
AndroidRuntime
android.content.ActivityNotFoundException: Unable to find explicit activity class {com.mycompany.myapp/com.mycompany.myapp.Spinner_Activity}; have you declared this activity in your AndroidManifest.xml? 05-18 12:10:59.002 29469 29469 E AndroidRuntime at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:2123) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1801) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at android.app.Activity.startActivityForResult(Activity.java:4495) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at android.app.Activity.startActivityForResult(Activity.java:4453) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at android.app.Activity.startActivity(Activity.java:4814) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at android.app.Activity.startActivity(Activity.java:4782) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at com.mycompany.myapp.List_Widgets0000000.onItemClick(List_Widgets.java:88) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at android.widget.AdapterView.performItemClick(AdapterView.java:318) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at android.widget.AbsListView.performItemClick(AbsListView.java:1197) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at android.widget.AbsListView$PerformClick.run(AbsListView.java:3166) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at android.widget.AbsListView.run(AbsListView.java:4119) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at android.os.Handler.handleCallback(Handler.java:789) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at android.os.Handler.dispatchMessage(Handler.java:98) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at android.os.Looper.loop(Looper.java:164) 05-18 12:10:59.002 29469 29469 E AndroidRuntime at android.app.ActivityThread.main(ActivityThread.java:6809) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at java.lang.reflect.Method.invoke(Native Method) 05-18 12:10:59.002 29469 29469 E AndroidRuntime at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 05-18 12:10:59.002 29469 29469 E AndroidRuntime
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) 05-18 12:10:59.008 29469 29469 E AndroidRuntime
FATAL EXCEPTION: main

Answer 1

Unable to find explicit activity class {com.mycompany.myapp/com.mycompany.myapp.Spinner_Activity}; have you declared this activity in your AndroidManifest.xml?

根据您的 logcat，我认为您忘记将 Spinner_Activity 添加到 Manifest 文件。检查那里是否存在 Spinner_Activity。如果没有，只需将其添加到那里。

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

我建议您通过菜单 File -> New -> Activity -> Empty Activity 创建新活动，studio 会同时创建 activity, layout and note in manifest 本身。

至于我，你的代码运行良好

如何通过字符串数组 android 将自定义 listView 项目扩展到超过 10 个项目？

How to extend custom listView item more than 10 items through String array android?

arrays

android

listview

custom-lists

android-arrayadapter