我有两个活动,第一个加载 url(简单 webview),第二个从 listview 获取 url 的 id,然后回调第一个活动以加载 url。我onActivityResult()
在第一个活动中使用方法来获取额外的数据(url id)。我的问题是,当我想onActivityResult()
在第二个活动中从 ListView 中选择项目后,在第一个 Activity 中显示 ProgressDialog 时,我得到了一个 ProgressDialog 但它只显示几秒钟(非常快)然后在完成 url(WebView)的加载之前消失
这是我希望对我有所帮助的拖车活动的代码。
public class LibActivity extends Activity {
private ImageButton btnCategoriesList;
public static final int BOOK_CATEGORY_REQUEST_CODE = 1;
private WebView webView;
public ProgressDialog dialog;
private Handler handler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.lib);
handler = new Handler();
dialog = ProgressDialog.show(this, "Loading", "Please wait", true, false);
DisplayMetrics displaymetrics = new DisplayMetrics();
webView = (WebView) findViewById(R.id.categoryWebView);
webView.setWebViewClient(new CategoryItemWebViewClient());
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl("http://maktabati.mobi/V3/store.php?catid=" + "91");
btnCategoriesList = (ImageButton) findViewById(R.id.btn_category_list);
btnCategoriesList.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
showBooksCategories();
}
});
}
/**
*
*/
protected void showBooksCategories() {
Intent intent = new Intent(getApplicationContext(), BooksCategoriesActivity.class);
startActivityForResult(intent, BOOK_CATEGORY_REQUEST_CODE);
}
/**
*
* @author Jamil
*
*/
private class CategoryItemWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.contains("book")) {
String bookId = url.substring(12);
Intent intent = new Intent(getApplicationContext(), BookDetailActivity.class);
intent.putExtra("BOOK_ID", bookId);
startActivity(intent);
view.stopLoading();
}
return super.shouldOverrideUrlLoading(view, url);
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
dialog.dismiss();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, final Intent data) {
if (requestCode == BOOK_CATEGORY_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
dialog = ProgressDialog.show(this, "Loading", "Please wait", true);
new Thread() {
public void run() {
webView.loadUrl("http://maktabati.mobi/V3/store.php?catid=" + data.getStringExtra("CATEGORY_ID"));
handler.post(new Runnable() {
@Override
public void run() {
dialog.dismiss();
}
});
}
}.start();
}
}
super.onActivityResult(requestCode, resultCode, data);
}
第二个活动
public class BooksCategoriesActivity extends Activity {
ItemsCategoriesAdapter adapter;
ArrayList<Category> lstCategory;
Handler handlerProgressDialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.books_categories_list);
handlerProgressDialog = new Handler();
CategoryHandler handler = new CategoryHandler();
ParserCreater parserCreater = new ParserCreater(handler);
parserCreater.parse("http://maktabati.mobi/V3/getCategories.php");
lstCategory = handler.getLstCategory();
final ListView listView = (ListView) findViewById(R.id.categories_list);
adapter = new ItemsCategoriesAdapter(lstCategory);
listView.setAdapter(adapter);
listView.setTextFilterEnabled(true);
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, final int position, long arg3) {
Intent intent = new Intent(getApplicationContext(), LibActivity.class);
intent.putExtra("CATEGORY_ID", lstCategory.get(position).getId());
BooksCategoriesActivity.this.setResult(RESULT_OK, intent);
finish();
}
});
}
谢谢