私のAndroidアプリケーションでは、致命的な例外が発生しています。サムネイル、画像の名前、画像のサイズなどの画像情報をリストしています。しかし、その例外の下でコードを実行しようとしたとき。ここにコードがあります-
public class ImportFile<Context> extends ListActivity {
String names[];
Bitmap bb[];
long size1[];
Intent i;
private String myFile;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mylist);
File file = new File(Environment.getExternalStorageDirectory()
+ File.separator
+ "gallery" //folder name
);
if (!file.exists()) {
file.mkdirs();
}
setListAdapter(new IconicAdapter());
}
class IconicAdapter extends ArrayAdapter<String> {
IconicAdapter() {
super(ImportFile.this, R.layout.row, R.id.lable, names);
}
public View getView(int position,View convertview,ViewGroup parent){
View row=super.getView(position, convertview, parent);
ImageView icon=(ImageView)row.findViewById(R.id.icon);
icon.setImageBitmap(bb[position]);
TextView size=(TextView) row.findViewById(R.id.size);
size.setText(size1[position]+"");
return row;
}
}
//read from sdcard
private void getSD() {
List<String> item = new ArrayList<String>();
File f = new File("/sdcard/download");
File[] files = f.listFiles();
int j=0;
for(int i = 0; i < files.length; i++) {
File file = files[i];
//take the file name only
long size = file.length()/1024;
myFile = file.getPath().substring(file.getPath().lastIndexOf("/")+1,file.getPath().length()).toLowerCase();
if(myFile.endsWith(".jpeg")||myFile.endsWith(".png")|| myFile.endsWith(".gif") || myFile.endsWith(".jpg"))
{
names[j]=myFile;
size1[j]=size;
Bitmap b=ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(file.getPath()), 50,50);
bb[j]=b;
j++;
item.add(b +myFile+" "+"Size:"+size+" KB" );
}
}
}
}
以下は例外です -
02-14 18:00:44.267: E/AndroidRuntime(909): FATAL EXCEPTION: main
02-14 18:00:44.267: E/AndroidRuntime(909): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.my.zproject/com.my.zproject.ImportFile}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
02-14 18:00:44.267: E/AndroidRuntime(909): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
02-14 18:00:44.267: E/AndroidRuntime(909): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
02-14 18:00:44.267: E/AndroidRuntime(909): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
02-14 18:00:44.267: E/AndroidRuntime(909): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
02-14 18:00:44.267: E/AndroidRuntime(909): at android.os.Handler.dispatchMessage(Handler.java:99)
02-14 18:00:44.267: E/AndroidRuntime(909): at android.os.Looper.loop(Looper.java:123)
02-14 18:00:44.267: E/AndroidRuntime(909): at android.app.ActivityThread.main(ActivityThread.java:4627)
02-1 4 18:00:44.267: E/AndroidRuntime(909): at java.lang.reflect.Method.invokeNative(Native Method)
02-14 18:00:44.267: E/AndroidRuntime(909): at java.lang.reflect.Method.invoke(Method.java:521)
02-14 18:00:44.267: E/AndroidRuntime(909): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
02-14 18:00:44.267: E/AndroidRuntime(909): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
02-14 18:00:44.267: E/AndroidRuntime(909): at dalvik.system.NativeStart.main(Native Method)
02-14 18:00:44.267: E/AndroidRuntime(909): Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
02-14 18:00:44.267: E/AndroidRuntime(909): at android.app.ListActivity.onContentChanged(ListActivity.java:245)
02-14 18:00:44.267: E/AndroidRuntime(909): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:201)
02-14 18:00:44.267: E/AndroidRuntime(909): at android.app.Activity.setContentView(Activity.java:1647)
02-14 18:00:44.267: E/AndroidRuntime(909): at com.my.zproject.ImportFile.onCreate(ImportFile.java:33)
ここにrow.xmlがあります-
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<ImageView
android:id="@+id/icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:padding="2dip"
/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<TextView
android:id="@+id/lable"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<TextView
android:id="@+id/size"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
</LinearLayout>
ここに mylist.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/list" >
</ListView>
</LinearLayout>