03-01 17：00：28.629：E/AndroidRuntime（30201）：致命例外：main

Question

所以使用gridview創建視圖。我有一個包含圖像視圖的佈局。當點擊gridview上的視圖時，我想激活相同的佈局，但在佈局中點擊圖像。但是，我得到了錯誤。

這裏是我的佈局

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="match_parent" > 

<Button 
    android:id="@+id/button2" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignBaseline="@+id/button1" 
    android:layout_alignBottom="@+id/button1" 
    android:layout_alignParentRight="true" 
    android:text="Hints" /> 

<ImageView 
    android:id="@+id/imageView1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_below="@+id/button1" 
    android:layout_centerHorizontal="true" 
    android:layout_marginTop="92dp" 
    android:src="@drawable/adese" /> 

<Button 
    android:id="@+id/button1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentTop="true" 
    android:layout_centerHorizontal="true" 
    android:layout_marginTop="69dp" 
    android:text="Get Hint" /> 

<Button 
    android:id="@+id/button3" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_above="@+id/imageView1" 
    android:layout_alignParentLeft="true" 
    android:text="Back" /> 

<EditText 
    android:id="@+id/editText1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_below="@+id/imageView1" 
    android:layout_centerHorizontal="true" 
    android:layout_marginTop="32dp" 
    android:ems="10" > 

    <requestFocus /> 
</EditText> 

</RelativeLayout> 

這裏是我的Java

package com.example.turkishlogoquiz; 

import android.os.Bundle; 
import android.provider.MediaStore.Images; 
import android.app.Activity; 
import android.view.Menu; 
import android.view.View; 
import android.content.Intent; 
import android.content.res.Resources; 
import android.graphics.drawable.Drawable; 

import android.widget.*; 
import android.widget.AdapterView.OnItemClickListener; 

public class LogoSelectionActivity extends Activity { 

ImageView view; 
Drawable image; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_list_logos); 

    view = (ImageView)findViewById(R.id.imageView1); 

    GridView gridview = (GridView) findViewById(R.id.gridview); 
    gridview.setAdapter(new ImageAdapter(this)); 

    gridview.setOnItemClickListener(new OnItemClickListener() { 
     public void onItemClick(AdapterView<?> parent, View v, int position, long  id) { 

      v = (ImageView)v; 
      image=v.getResources().getDrawable(v.getId()); 
      view.setImageDrawable(image); 
      Intent intent = new Intent(LogoSelectionActivity.this,  LogoActivity.class); 
      startActivity(intent); 
     } 
    }); 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.activity_main, menu); 
    return true; 
} 

} 

這裏是我的形象適配器代碼

package com.example.turkishlogoquiz; 

import android.content.Context; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.GridView; 
import android.widget.ImageView; 

public class ImageAdapter extends BaseAdapter { 
private Context mContext; 

public ImageAdapter(Context c) { 
    mContext = c; 
} 

public int getCount() { 
    return mThumbIds.length; 
} 

public Object getItem(int position) { 
    return null; 
} 

public long getItemId(int position) { 
    return 0; 
} 

// create a new ImageView for each item referenced by the Adapter 
public View getView(int position, View convertView, ViewGroup parent) { 
    ImageView imageView; 
    if (convertView == null) { // if it's not recycled, initialize some attributes 
     imageView = new ImageView(mContext); 
     imageView.setLayoutParams(new GridView.LayoutParams(200, 200)); 
     imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); 
     imageView.setPadding(8, 8, 8, 8); 
    } else { 
     imageView = (ImageView) convertView; 
    } 

    imageView.setImageResource(mThumbIds[position]); 
    return imageView; 
} 

// references to our images 
private Integer[] mThumbIds = { 
     R.drawable.adese, R.drawable.birvar, 
     R.drawable.agaoglu, R.drawable.akinsoft, 
     R.drawable.afra, 

}; 
} 

如果有人幫我，我很感激。

這是我的錯誤信息

03-02 22:16:03.524: E/AndroidRuntime(32407): FATAL EXCEPTION: main 
03-02 22:16:03.524: E/AndroidRuntime(32407): android.content.res.Resources$NotFoundException: Resource ID #0xffffffff 
03-02 22:16:03.524: E/AndroidRuntime(32407): at android.content.res.Resources.getValue(Resources.java:1026) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at android.content.res.Resources.getDrawable(Resources.java:671) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at com.example.turkishlogoquiz.LogoSelectionActivity$1.onItemClick(LogoSelectionActivity.java:35) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at android.widget.AdapterView.performItemClick(AdapterView.java:298) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at android.widget.AbsListView.performItemClick(AbsListView.java:1283) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at android.widget.AbsListView$PerformClick.run(AbsListView.java:3074) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at android.widget.AbsListView$1.run(AbsListView.java:4147) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at android.os.Handler.handleCallback(Handler.java:615) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at android.os.Handler.dispatchMessage(Handler.java:92) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at android.os.Looper.loop(Looper.java:137) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at android.app.ActivityThread.main(ActivityThread.java:4898) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at java.lang.reflect.Method.invokeNative(Native Method) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at java.lang.reflect.Method.invoke(Method.java:511) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1008) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:775) 
03-02 22:16:03.524: E/AndroidRuntime(32407): at dalvik.system.NativeStart.main(Native Method) 

Answer 1

堆棧跟蹤這樣說：

android.content.res.Resources$NotFoundException: Resource ID #0xffffffff 

v.getId()返回View，這比int S IN R.drawable不同的id。這意味着你打電話v.getResources().getDrawable()，它會失敗。

什麼可能的工作：

imageView = (ImageView)v; 
image=imageView.getDrawable(); 
view.setImageDrawable(image); 

然而，由於image似乎是第一個XML，並在另一個XML佈局文件GridView，你最好通過position到包含的XML活動image然後從那裏獲取Drawable。例如

public void onItemClick(AdapterView<?> parent, View v, int position, long id) { 
      Intent intent = new Intent(LogoSelectionActivity.this, LogoActivity.class); 
      intent.putExtra ("clicked_position", position) 
      startActivity(intent); 
     } 

然後在LogoActivity在onCreate()：

ImageView view = (ImageView)findViewById(R.id.imageView1); 

switch (getIntent().getIntExtra ("clicked_position", -1)) 
{ 
    case 0: 
    view.setImageResouce (R.drawable.x); 
    break; 
    case 1: 
    view.setImageResouce (R.drawable.y); 
    break; 
    default: 
    view.setImageResouce (R.drawable.default); 
} 

Answer 2

從閱讀你的代碼中會出現你的錯誤，但似乎你要在這些線NullPointerException我只能猜測：

GridView gridview = (GridView) findViewById(R.id.gridview); 
gridview.setAdapter(new ImageAdapter(this)); 

你XML佈局文件不包含編號爲gridview的GridView，所以findViewById(R.id.gridview)返回null。在此之後，您嘗試撥打setAdapter(...)本身很可能會調用異常。

如果您向我們提供關於例外的更多信息將會非常有幫助。

Answer 3

這似乎是問題所在。您的GridView位於另一個xml佈局中。因此，將其與R.id.gridview聯繫起來可以正常工作，但在onClick上附加onClick將無法正常工作，因爲在當前活動的XML佈局中找不到該聯繫人。嘗試movind你的GridView在此XML - (R.layout.activity_list_logos)