我对 Android 中的 Thread 有疑问。我有一个带有 CheckBox 的 gridview，我想将所有图片库加载到这个 Grid 中。但我想加载这个线程。但是当我单击加载图像程序关闭时。这是我的代码。请查看并给我最好的解决方案。谢谢
Add_Image.Java ：
public class add_images extends Activity implements Runnable {
private int count;
private Bitmap[] thumbnails;
private boolean[] thumbnailsselection;
private String[] arrPath;
private ImageAdapter imageAdapter;
private String selectImages="";
private final ProgressDialog pd = new ProgressDialog(this);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_images);
pd.setProgressStyle(ProgressDialog.STYLE_SPINNER);
pd.setMessage("Please Wait...");
pd.setIndeterminate(false);
pd.setCancelable(true);
pd.show();
Thread t = new Thread(add_images.this);
t.start();
}
@Override
public void run(){
GetList();
}
private void GetList() {
try {
final String[] columns = { MediaStore.Images.Media.DATA,
MediaStore.Images.Media._ID };
final String orderBy = MediaStore.Images.Media._ID;
Cursor imagecursor = managedQuery(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns,
null, null, orderBy);
final int image_column_index = imagecursor
.getColumnIndex(MediaStore.Images.Media._ID);
this.count = imagecursor.getCount();
this.thumbnails = new Bitmap[this.count];
this.arrPath = new String[this.count];
this.thumbnailsselection = new boolean[this.count];
for (int i = 0; i < this.count; i++) {
imagecursor.moveToPosition(i);
final int id = imagecursor.getInt(image_column_index);
final int dataColumnIndex = imagecursor
.getColumnIndex(MediaStore.Images.Media.DATA);
thumbnails[i] = MediaStore.Images.Thumbnails.getThumbnail(
getApplicationContext().getContentResolver(), id,
MediaStore.Images.Thumbnails.MICRO_KIND, null);
arrPath[i] = imagecursor.getString(dataColumnIndex);
pd.setProgress(i);
}
GridView imagegrid = (GridView) findViewById(R.id.Add_Select_PhoneImageGrid);
imageAdapter = new ImageAdapter();
imagegrid.setAdapter(imageAdapter);
imagecursor.close();
pd.dismiss();
} catch (Exception ex) {
}
}
Add_Image.Xml ：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<Button
android:id="@+id/btn_images_back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:minWidth="110px"
android:text="Back To Main" android:onClick="onClick" />
<Button
android:id="@+id/btn_images_selected"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_toRightOf="@+id/btn_images_back"
android:text="Select" android:onClick="onClick"/>
<GridView
android:id="@+id/Add_Select_PhoneImageGrid"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="@id/btn_images_selected"
android:columnWidth="90dp"
android:gravity="center"
android:horizontalSpacing="10dp"
android:numColumns="auto_fit"
android:stretchMode="columnWidth"
android:verticalSpacing="10dp" />
</RelativeLayout>
add_view_galleryitem.xml ：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageView
android:id="@+id/add_view_thumbImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
<CheckBox
android:id="@+id/add_view_itemCheckBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true" />
</RelativeLayout>