GridView.FATAL EXCEPTION：主android.content.res.Resources $ NotFoundException：字符串资源ID＃0x0

Question

我希望当我点击GridView显示的一个元素时，我点击了显示的字母。但是最初当我想要表达元素的位置时，我得到了错误。如果我理解正确，gridview不会看到textview，但我不知道为什么。

错误：

5312-5312/standandroid.ru.words E/AndroidRuntime﹕ FATAL EXCEPTION: main 
android.content.res.Resources$NotFoundException: String resource ID #0x0 
     at android.content.res.Resources.getText(Resources.java:240) 
     at android.content.res.MiuiResources.getText(MiuiResources.java:131) 
     at android.widget.Toast.makeText(Toast.java:273) 
     at standandroid.ru.words.MainActivity$1$1.onItemClick(MainActivity.java:70) 
     at android.widget.AdapterView.performItemClick(AdapterView.java:298) 
     at android.widget.AbsListView.performItemClick(AbsListView.java:1130) 
     at android.widget.AbsListView$PerformClick.run(AbsListView.java:2818) 
     at android.widget.AbsListView$1.run(AbsListView.java:3498) 
     at android.os.Handler.handleCallback(Handler.java:730) 
     at android.os.Handler.dispatchMessage(Handler.java:92) 
     at android.os.Looper.loop(Looper.java:137) 
     at android.app.ActivityThread.main(ActivityThread.java:5137) 
     at java.lang.reflect.Method.invokeNative(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:525) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:756) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:572) 
     at miui.dexspy.DexspyInstaller.main(DexspyInstaller.java:171) 
     at dalvik.system.NativeStart.main(Native Method) 

MainActivity.java：

public class MainActivity extends Activity { 
TextView txt, textTV; 
EditText etxt; 
Button btn; 
ArrayAdapter<String> adapter; 
GridView gridView; 
String name; 

char c; 
ArrayList arrayList=new ArrayList(); 

int i; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    txt = (TextView) findViewById(R.id.textView); 
    etxt = (EditText) findViewById(R.id.editText); 
    btn = (Button) findViewById(R.id.button); 
    textTV = (TextView) findViewById(R.id.tv); 

    btn.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 

      name = etxt.getText().toString(); 
      TreeSet list = new TreeSet(); 
      for (i = 0; i < name.length(); i++) { 
       c = name.charAt(i); 
       list.add(c); 

      } 
      arrayList = new ArrayList(list); 

      adapter = new ArrayAdapter<String>(MainActivity.this, R.layout.item, R.id.tv, arrayList); 
      gridView = (GridView) findViewById(R.id.gridmain); 
      gridView.setAdapter(adapter); 
      ViewGrid(); 
      gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
       @Override 
       public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 

        Toast.makeText(MainActivity.this, position,Toast.LENGTH_LONG).show(); 
       } 
      }); 
     } 

    });} 
    private void ViewGrid(){ 
    gridView.setNumColumns(4); 
    gridView.setStretchMode(GridView.STRETCH_COLUMN_WIDTH); }} 

activity_main.xml中：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:paddingLeft="@dimen/activity_horizontal_margin" 
android:paddingRight="@dimen/activity_horizontal_margin" 
android:paddingTop="@dimen/activity_vertical_margin" 
android:paddingBottom="@dimen/activity_vertical_margin" 
tools:context=".MainActivity"> 



<TextView 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:textAppearance="?android:attr/textAppearanceLarge" 
    android:id="@+id/textView" 
    android:layout_alignParentBottom="true" 
    android:layout_centerHorizontal="true" 
    android:layout_marginBottom="175dp" /> 

<EditText 

    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:id="@+id/editText" 
    android:singleLine="true" 
    android:layout_alignParentTop="true" 
    android:layout_alignParentRight="true" 
    android:layout_alignParentEnd="true" 
    android:layout_marginTop="48dp" /> 

<Button 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="New Button" 
    android:id="@+id/button" 
    android:layout_below="@+id/editText" 
    android:layout_centerHorizontal="true" 
    android:layout_marginTop="44dp" /> 
<GridView 
    android:id="@+id/gridmain" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:layout_marginTop="44dp" 
    android:layout_alignTop="@+id/textView" 
    android:layout_alignParentLeft="true" 
    android:layout_alignParentStart="true"></GridView> 

</RelativeLayout> 

item.xml：

<?xml version="1.0" encoding="utf-8"?> 

<LinearLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" 
android:layout_width="match_parent" 
android:layout_height="match_parent"> 

<TextView 
    android:id="@+id/tv" 
    android:textSize="40sp" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" /> 
</LinearLayout> 

http://i.stack.imgur.com/j5S93.png

Answer 1

哦！我看到，问题是Toast正在考虑position作为resourceID。如果您在此处看到Toast规格，则会看到您可以定义resourceId或CharSequence。所以请确保你通过了String的位置。例如：

Toast.makeText(MainActivity.this, String.valueOf(position),Toast.LENGTH_LONG).show();