Question

请帮帮我。这是错误还是警告？我怎么解决这个问题？错误是View v是无法访问的语句

public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) { 
    return super.getView(position, convertView, parent); 
    View v; 
    v = convertView; 
    LayoutInflater li = LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    v = li.inflate(R.layout.custom_layout, null);
    TextView champ = (TextView)v.findViewById(R.id.textView); 
    TextView year = (TextView)v.findViewById(R.id.textView2);
    ImageView pic = (ImageView)v.findViewById(R.id.imageView);
    champ.setText(adaptArray.get(position).getChamp()); year.setText(adaptArray.get(position).getYear()); pic.setImageResource(adaptArray.get(position).getSport());

    return v;
}

Answer 1

删除此

return super.getView(position, convertView, parent);

Answer 2

在return关键字无法访问之后写入其他任何内容。从函数的第一行中删除返回 super.getView（position，convertView，parent）; 。

Answer 3

这是一个警告，告诉您对代码的静态分析显示您的某些代码永远不会到达，因为该方法之前会返回。

以下是如何通过将convertView传递给super.getView(...)来解决问题并正确使用public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) { View v = super.getView(position, convertView, parent); if(v == null){ LayoutInflater li = LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); v = li.inflate(R.layout.custom_layout, null); } TextView champ = (TextView)v.findViewById(R.id.textView); TextView year = (TextView)v.findViewById(R.id.textView2); ImageView pic = (ImageView)v.findViewById(R.id.imageView); champ.setText(adaptArray.get(position).getChamp()); year.setText(adaptArray.get(position).getYear()); pic.setImageResource(adaptArray.get(position).getSport()); return v; }：

this

Answer 4

这是因为该方法的 Top 中的以下代码行：
return super.getView(position, convertView, parent);

当您从return method method内部时，java.lang.RuntimeException: at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2750) at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2811) at android.app.ActivityThread.-wrap12 (ActivityThread.java) at android.app.ActivityThread$H.handleMessage (ActivityThread.java:1528) at android.os.Handler.dispatchMessage (Handler.java:102) at android.os.Looper.loop (Looper.java:154) at android.app.ActivityThread.main (ActivityThread.java:6316) at java.lang.reflect.Method.invoke (Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:872) at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:762) Caused by: java.lang.SecurityException: at android.os.Parcel.readException (Parcel.java:1683) at android.database.DatabaseUtils.readExceptionFromParcel (DatabaseUtils.java:183) at android.database.DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel (DatabaseUtils.java:146) at android.content.ContentProviderProxy.openTypedAssetFile (ContentProviderNative.java:692) at android.content.ContentResolver.openTypedAssetFileDescriptor (ContentResolver.java:1163) at android.content.ContentResolver.openTypedAssetFileDescriptor (ContentResolver.java:1107) at android.content.ClipData$Item.coerceToText (ClipData.java:332) at br.com.sicoob.camera.clipboard.ClipboardInterface.getText (ClipboardInterface.java:35) at br.com.sicoobnet.InicioWap.verificarExisteBoletoCopiado (InicioWap.java:312) at br.com.sicoobnet.InicioWap.verificarAcao (InicioWap.java:308) at br.com.sicoobnet.InicioWap.onCreate (InicioWap.java:126) at android.app.Activity.performCreate (Activity.java:6757) at android.app.Instrumentation.callActivityOnCreate (Instrumentation.java:1119) at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2703)的其余代码将不会运行。 < / p>

View v是无法访问的语句

4 个答案: