我正在尝试根据字符串变量的值而不是字符串来查询parse.com表。
以下内容有效，是搜索内容的一个示例。
query.whereEqualTo("movieCategory", "Action");
但是我没有将这个变量存储在Spinner中。
query.whereEqualTo("movieCategory", derrick);
我可以从其他方法中访问这个变量..除了解析查询
想象一下变量“derrick”包含另一个字符串，例如“Thriller”
关于如何实现这一目标的任何想法，而不是受限于我特别想要搜索的内容？
应用程序崩溃并抱怨“android.view.WindowLeaked：”
我是否需要像derrick.equals（“action”）那样做，否则如果derrick.equals（“浪漫”）等......？因为当我尝试同样的崩溃时。
提前致谢
修改
这是我的DashboardActivity.class，我正在获取变量......
public String getCategory() {
Spinner spinCategory = (Spinner) findViewById(R.id.spin_category);
String whatCategory = spinCategory.getSelectedItem().toString();
return whatCategory;
}
以下是ResultsActivity.class
中的整个try方法// RemoteDataTask AsyncTask
private class RemoteDataTask extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Create a progressdialog
mProgressDialog = new ProgressDialog(ResultsActivity.this);
// Set progressdialog title
mProgressDialog.setTitle("");
// Set progressdialog message
mProgressDialog.setMessage("Loading...");
mProgressDialog.setIndeterminate(false);
// Show progressdialog
mProgressDialog.show();
}
@Override
protected Void doInBackground(Void... params) {
DashboardActivity cls2= new DashboardActivity();
cls2.getCategory();
String derrick = cls2.getCategory();
// Create the array
movielist = new ArrayList<movieListGroup>();
try {
// Locate the class table named "Movie" in Parse.com
ParseQuery<ParseObject> query = new ParseQuery<ParseObject>(
"Movie");
query.whereEqualTo("movieCategory", derrick);
// if (derrick.equals ("Action")) {
// query.whereEqualTo("movieCategory", "Action");
//
// } else if (derrick.equals ("Romance")) {
// query.whereEqualTo("movieCategory", "Romance");
//
// } else if (derrick.equals("Comedy")) {
// query.whereEqualTo("movieCategory", "Comedy");
//
// }
//query.whereEqualTo("movieCategory", "Romance");
query.orderByAscending("movieNum");
ob = query.find();
for (ParseObject movie : ob) {
// Locate images in flag column
ParseFile image = (ParseFile) movie.get("movieImage");
movieListGroup map = new movieListGroup();
map.setNumber((String) movie.get("movieNum"));
map.setCategory((String) movie.get("movieCategory"));
map.setTitle((String) movie.get("movieTitle"));
map.setDescription((String) movie.get("movieDesc"));
map.setDirector((String) movie.get("movieDirector"));
map.setFlag(image.getUrl());
movielist.add(map);
}
} catch (ParseException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
// Locate the listview in listview_main.xml
listview = (ListView) findViewById(R.id.listview);
// Pass the results into ListViewAdapter.java
adapter = new ListViewAdapter(ResultsActivity.this,
movielist);
// Binds the Adapter to the ListView
listview.setAdapter(adapter);
// Close the progressdialog
mProgressDialog.dismiss();
}
}
和原木猫.....
03-13 17:40:52.575 5980-5980/com.example.derrick.moveed E/WindowManager﹕ android.view.WindowLeaked: Activity com.example.derrick.moveed.ResultsActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{339cf210 V.E..... R.....ID 0,0-1026,288} that was originally added here
at android.view.ViewRootImpl.<init>(ViewRootImpl.java:363)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:261)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
at android.app.Dialog.show(Dialog.java:298)
at com.example.derrick.moveed.ResultsActivity$RemoteDataTask.onPreExecute(ResultsActivity.java:77)
at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:587)
at android.os.AsyncTask.execute(AsyncTask.java:535)
at com.example.derrick.moveed.ResultsActivity.onCreate(ResultsActivity.java:61)
at android.app.Activity.performCreate(Activity.java:5933)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
03-13 17:40:59.376 5980-6003/com.example.derrick.moveed I/Process﹕ Sending signal. PID: 5980 SIG: 9
答案 0 :(得分：1)
您不能仅使用new实例化Activity，然后使用findViewById（）。如果您的AsyncTask是您的Activity的一部分，您应该能够调用DashboardActivity.this。取而代之的是getCategory（）。
刚看到还有另一个Activity没有显示，我不确定如何从DashboardActivity启动ResultActivity。启动ResultActivity时，您可能必须将该类别作为额外内容传递。
答案 1 :(得分：0)
试试这个，它帮助了我，我也遇到了同样的错误。
private class RemoteDataTask extends AsyncTask<Void, Void, Void> {
ProgressDialog mProgressDialog ;
Context c;
public RemoteDataTask(Context c){
this.c =c;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
// Create a progressdialog
mProgressDialog = new ProgressDialog(ResultsActivity.this);
// Set progressdialog title
........
}
}
现在正在调用此任务：
new RemoteDataTask(MainActivity.this).execute();