问题
While this code works, but the blank screen appears until doInBackground is complete
package com.vaishnavismeclass.english.naalaayiradivyaprabandam;
import android.app.ProgressDialog;
import android.content.ContentValues;
import android.content.Context;
import android.content.res.Resources;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.os.AsyncTask;
import android.util.Log;
public class Divyadesamdb extends AsyncTask<String, Void, String>{
public static final String KEY_ROWID = "_id";
public static final String KEY_CODE = "code";
public static final String KEY_NAME = "name";
public static final String KEY_CONTINENT = "continent";
private static final String TAG = "CountriesDbAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
private final Context mCtx;
/*
* My code starts here
*/
// Table prabandham
public static final String TABLE_PRABANDHAMS = "prabandhams";
public static final String PRABANDHAMS_COLUMN_ID = "_id";
public static final String PRABANDHAMS_COLUMN_PRABANDHAM = "prabandham";
public static final String PRABANDHAMS_COLUMN_FROM = "from";
public static final String PRABANDHAMS_COLUMN_ENDING = "ending";
public static final String PRABANDHAMS_COLUMN_TOTAL = "total";
public static final String PRABANDHAMS_COLUMN_AZHWAAR = "azhwaar";
public static final String PRABANDHAMS_COLUMN_CLASSIFICATION = "classification";
// Table prabandham
public static final String TABLE_DIVYADESAMS = "divyadesams";
public static final String DIVYADESAMS_COLUMN_ID = "_id";
public static final String DIVYADESAMS_COLUMN_DDD = "ddd";
public static final String DIVYADESAMS_COLUMN_MANDALAM = "mandalam";
public static final String DIVYADESAMS_COLUMN_TRAVELBASE = "travelbase";
public static final String DIVYADESAMS_COLUMN_DIVYADESAM = "divyadesam";
public static final String DIVYADESAMS_COLUMN_LOCATION = "location";
public static final String DIVYADESAMS_COLUMN_DISTANCE = "distance";
public static final String DIVYADESAMS_COLUMN_ROUTE = "route";
public static final String DIVYADESAMS_COLUMN_POIGAIAZHWAAR = "poigaiazhwaar";
public static final String DIVYADESAMS_COLUMN_BHOODHATHAZHWAAR = "bhoodhathazhwaar";
public static final String DIVYADESAMS_COLUMN_PEYAAZHWAAR = "peyaazhwaar";
public static final String DIVYADESAMS_COLUMN_TIRUMAZHISAIAZHWAAR = "tirumazhisaiazhwaar";
public static final String DIVYADESAMS_COLUMN_NAMMAZHWAAR = "nammazhwaar";
public static final String DIVYADESAMS_COLUMN_KULASEKARAAZHWAAR = "kulasekaraazhwaar";
public static final String DIVYADESAMS_COLUMN_PERIAAHZWAR = "periaahzwar";
public static final String DIVYADESAMS_COLUMN_ANDAL = "andal";
public static final String DIVYADESAMS_COLUMN_THONDARADIPPODIAZHWAAR = "thondaradippodiazhwaar";
public static final String DIVYADESAMS_COLUMN_TIRUMANGAIAZHWAAR = "tirumangaiazhwaar";
public static final String DIVYADESAMS_COLUMN_TIRUPPANAZHWAAR = "tiruppanazhwaar";
public static final String DIVYADESAMS_COLUMN_TOTALPAASURAMS = "totalpaasurams";
public static final String DIVYADESAMS_COLUMN_NOOFAZHWAARSSUNG = "noofazhwaarssung";
public static final String DIVYADESAMS_COLUMN_GEOCODE = "geocode";
public static final String DIVYADESAMS_COLUMN_FACINGPOSITION = "facingposition";
public static final String DIVYADESAMS_COLUMN_TIRUKKOLAM = "tirukkolam";
public static final String DIVYADESAMS_COLUMN_THAYAR = "thayar";
public static final String DIVYADESAMS_COLUMN_MOOLAVAR = "moolavar";
public static final String DIVYADESAMS_COLUMN_UTSAVAR = "utsavar";
public static final String DIVYADESAMS_COLUMN_VIMAANAM = "vimaanam";
public static final String DIVYADESAMS_COLUMN_PUSHKARANI = "pushkarani";
public static final String DIVYADESAMS_COLUMN_AAGAMAM = "aagamam";
public static final String DIVYADESAMS_COLUMN_SAMPRADHAYAM = "sampradhayam";
public static final String DIVYADESAMS_COLUMN_OTHERNAME = "othername";
// table azhwaar
public static final String TABLE_AZHWAARS = "azhwaars";
public static final String AZHWAARS_COLUMN_ID = "_id";
public static final String AZHWAARS_COLUMN_NAME = "name";
public static final String AZHWAARS_COLUMN_ORIGIN = "origin";
public static final String AZHWAARS_COLUMN_GEOCODE = "geocode";
public static final String AZHWAARS_COLUMN_CALENDAR = "calendar";
public static final String AZHWAARS_COLUMN_NAKSHATRAM = "nakshatram";
public static final String AZHWAARS_COLUMN_PRABANDAM = "prabandam";
public static final String AZHWAARS_COLUMN_PERIOD = "period";
public static final String AZHWAARS_COLUMN_NAMMAZHWAAR_AMSAM = "nammazhwaar_amsam";
public static final String AZHWAARS_COLUMN_NITYASURI_AMSAM = "nityasuri_amsam";
public static final String AZHWAARS_COLUMN_OTHERNAMES = "othernames";
public static final String AZHWAARS_COLUMN_MANGALASAASANAM = "mangalasaasanam";
// table pasurams
public static final String TABLE_PASURAMS = "pasurams";
public static final String PASURAMS_COLUMN_ID = "_id";
public static final String PASURAMS_COLUMN_PAASURAMNUMBER = "paasuramnumber";
public static final String PASURAMS_COLUMN_AZHWAAR = "azhwaar";
public static final String PASURAMS_COLUMN_AAYIRAM = "aayiram";
public static final String PASURAMS_COLUMN_CATEGORY = "category";
public static final String PASURAMS_COLUMN_SUBCATEGORY = "subcategory";
public static final String PASURAMS_COLUMN_TITLE = "title";
public static final String PASURAMS_COLUMN_TITLENUMBER = "titlenumber";
public static final String PASURAMS_COLUMN_MANGALASASANAMON = "mangalasasanamon";
public static final String PASURAMS_COLUMN_PAASURAM_EN_STR = "paasuram_en_str";
public static final String PASURAMS_COLUMN_IMAGE_ID = "imageid";
private static final String DATABASE_NAME = "divyaprabandam.db";
private static final int DATABASE_VERSION = 4;
// Database creation sql statement
private static final String PASURAM_CREATE = "CREATE TABLE "
+ TABLE_PASURAMS + " (" + PASURAMS_COLUMN_ID
+ " integer PRIMARY KEY autoincrement,"
+ PASURAMS_COLUMN_PAASURAMNUMBER + " Text,"
+ PASURAMS_COLUMN_AAYIRAM + " Text," + PASURAMS_COLUMN_AZHWAAR
+ " Text," + PASURAMS_COLUMN_CATEGORY + " Text,"
+ PASURAMS_COLUMN_SUBCATEGORY + " Text," + PASURAMS_COLUMN_TITLE
+ " Text," + PASURAMS_COLUMN_TITLENUMBER + " Text,"
+ PASURAMS_COLUMN_MANGALASASANAMON + " Text,"
+ PASURAMS_COLUMN_PAASURAM_EN_STR + " Text,"
+ PASURAMS_COLUMN_IMAGE_ID + " integer);";
/*
* My code ends here
*/
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
Log.w(TAG, PASURAM_CREATE);
db.execSQL("DROP TABLE IF EXISTS " + TABLE_PASURAMS);
db.execSQL(PASURAM_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
+ newVersion + ", which will destroy all old data");
db.execSQL("DROP TABLE IF EXISTS " + TABLE_PASURAMS);
onCreate(db);
}
}
public Divyadesamdb(Context ctx) {
this.mCtx = ctx;
}
public Divyadesamdb open() throws SQLException {
mDbHelper = new DatabaseHelper(mCtx);
mDb = mDbHelper.getWritableDatabase();
return this;
}
public void close() {
if (mDbHelper != null) {
mDbHelper.close();
}
}
public long createPasuram(String pasuramNumber, String Azhwaar,
String Aayiram, String Category, String SubCategory, String Title,
String TitleNumber, String MangalasasanamOn, String Paasuram_en_str) {
ContentValues initialValues = new ContentValues();
initialValues.put("paasuramnumber", pasuramNumber);
initialValues.put("aayiram", Aayiram);
initialValues.put("azhwaar", Azhwaar);
initialValues.put("category", Category);
initialValues.put("subcategory", SubCategory);
initialValues.put("title", Title);
initialValues.put("titlenumber", TitleNumber);
initialValues.put("mangalasasanamon", MangalasasanamOn);
initialValues.put("paasuram_en_str", Paasuram_en_str);
if (Azhwaar.equals("Poigai Azhwaar"))
initialValues.put("imageid", R.drawable.poigai);
if (Azhwaar.equals("Bhoodhath Azhwaar"))
initialValues.put("imageid", R.drawable.bhoodath);
if (Azhwaar.equals("Peya Azhwaar"))
initialValues.put("imageid", R.drawable.pey);
if (Azhwaar.equals("Tirumazhisai Azhwaar"))
initialValues.put("imageid", R.drawable.thirumazhisai);
if (Azhwaar.equals("Namm Azhwaar"))
initialValues.put("imageid", R.drawable.nammalwar);
if (Azhwaar.equals("Madhurakavi Azhwaar"))
initialValues.put("imageid", R.drawable.madhurakavi);
if (Azhwaar.equals("Kulasekara Azhwaar"))
initialValues.put("imageid", R.drawable.kulasekara);
if (Azhwaar.equals("PeriyAzhwaar"))
initialValues.put("imageid", R.drawable.perialwar);
if (Azhwaar.equals("Andal"))
initialValues.put("imageid", R.drawable.andal);
if (Azhwaar.equals("Thondaradippodi Azhwaar"))
initialValues.put("imageid", R.drawable.thondaradipodi);
if (Azhwaar.equals("Tiruppaan Azhwaar"))
initialValues.put("imageid", R.drawable.tiruppan);
if (Azhwaar.equals("Tirumangai Azhwaar"))
initialValues.put("imageid", R.drawable.tirumangai);
return mDb.insert(TABLE_PASURAMS, null, initialValues);
}
public boolean deleteAllPasurams() {
int doneDelete = 0;
doneDelete = mDb.delete(TABLE_PASURAMS, null, null);
Log.w(TAG, Integer.toString(doneDelete));
return doneDelete > 0;
}
public int getCountAllPasurams() {
int totalPasurams = 0;
String countQuery = "SELECT * FROM " + TABLE_PASURAMS;
Cursor cursor = mDb.rawQuery(countQuery, null);
totalPasurams = cursor.getCount();
cursor.close();
Log.w(TAG, Integer.toString(totalPasurams));
return totalPasurams;
}
public Cursor fetchAllPasurams(String pasuramNumber, String aayiram,
String azhwaar, String category, String mangalasasanamOn,
String subCategory, String title, String from, String ending) {
Cursor mCursor = mDb.query(TABLE_PASURAMS, new String[] {
PASURAMS_COLUMN_ID, PASURAMS_COLUMN_PAASURAMNUMBER,
PASURAMS_COLUMN_AAYIRAM, PASURAMS_COLUMN_AZHWAAR,
PASURAMS_COLUMN_CATEGORY, PASURAMS_COLUMN_MANGALASASANAMON,
PASURAMS_COLUMN_PAASURAM_EN_STR, PASURAMS_COLUMN_SUBCATEGORY,
PASURAMS_COLUMN_TITLE, PASURAMS_COLUMN_TITLENUMBER,
PASURAMS_COLUMN_IMAGE_ID }, PASURAMS_COLUMN_CATEGORY
+ " LIKE ? AND " + PASURAMS_COLUMN_SUBCATEGORY + " LIKE ? AND "
+ PASURAMS_COLUMN_TITLE + " LIKE ?", new String[] {
"%" + category + "%", "%" + subCategory + "%",
"%" + title + "%" }, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
public void insertPasurams() {
/*
ContentValues _pasuramsValues = new ContentValues();
Resources res = mCtx.getResources();
String[] _pasuramsTable_Records = res.getStringArray(R.array.pasurams);
// Loop trough array and insert records into table
int _Length = _pasuramsTable_Records.length;
int progressPercent = 0;
ProgressDialog barProgressDialog = new ProgressDialog(mCtx);
barProgressDialog.setTitle("Setting up Paasurams ...");
barProgressDialog.setMessage("Creating Paasurams ...");
barProgressDialog.setProgressStyle(barProgressDialog.STYLE_HORIZONTAL);
barProgressDialog.setProgress(0);
barProgressDialog.setMax(4535);
barProgressDialog.show();
for (int i = 0; i < _Length; i++) {
/*
* Update the progress on every 45 for 99 times
* reminder move to 100%
*
*/
/*
barProgressDialog.incrementProgressBy(1);
if ( (i % 45) == 0)
{
progressPercent++;
barProgressDialog.incrementProgressBy(1);
}
if (progressPercent==99){
progressPercent++;
barProgressDialog.incrementProgressBy(1);
}
*/
//
// split the csv string to columns
//
//String[] pasuramsSplitString = _pasuramsTable_Records[i].split(",");
//
// store the values into collection
/*
_pasuramsValues.put("paasuramnumber", pasuramsSplitString[0]);
_pasuramsValues.put("aayiram", pasuramsSplitString[2]);
_pasuramsValues.put("azhwaar", pasuramsSplitString[1]);
_pasuramsValues.put("category", pasuramsSplitString[3]);
_pasuramsValues.put("subcategory", pasuramsSplitString[4]);
_pasuramsValues.put("title", pasuramsSplitString[5]);
_pasuramsValues.put("titlenumber", pasuramsSplitString[6]);
_pasuramsValues.put("mangalasasanamon", pasuramsSplitString[7]);
_pasuramsValues.put("paasuram_en_str", pasuramsSplitString[8]);
if (pasuramsSplitString[1].equals("Poigai Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.poigai);
if (pasuramsSplitString[1].equals("Bhoodhath Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.bhoodath);
if (pasuramsSplitString[1].equals("Peya Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.pey);
if (pasuramsSplitString[1].equals("Tirumazhisai Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.thirumazhisai);
if (pasuramsSplitString[1].equals("Namm Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.nammalwar);
if (pasuramsSplitString[1].equals("Madhurakavi Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.madhurakavi);
if (pasuramsSplitString[1].equals("Kulasekara Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.kulasekara);
if (pasuramsSplitString[1].equals("PeriyAzhwaar"))
_pasuramsValues.put("imageid", R.drawable.perialwar);
if (pasuramsSplitString[1].equals("Andal"))
_pasuramsValues.put("imageid", R.drawable.andal);
if (pasuramsSplitString[1].equals("Thondaradippodi Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.thondaradipodi);
if (pasuramsSplitString[1].equals("Tiruppaan Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.tiruppan);
if (pasuramsSplitString[1].equals("Tirumangai Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.tirumangai);
mDb.insert("pasurams", null, _pasuramsValues);
}*/
doInBackground("Hello");
}
@Override
protected String doInBackground(String... arg0) {
ContentValues _pasuramsValues = new ContentValues();
Resources res = mCtx.getResources();
String[] _pasuramsTable_Records = res.getStringArray(R.array.pasurams);
// Loop trough array and insert records into table
int _Length = _pasuramsTable_Records.length;
int progressPercent = 0;
ProgressDialog barProgressDialog = new ProgressDialog(mCtx);
barProgressDialog.setTitle("Setting up Paasurams ...");
barProgressDialog.setMessage("Creating Paasurams ...");
barProgressDialog.setProgressStyle(barProgressDialog.STYLE_HORIZONTAL);
barProgressDialog.setProgress(0);
barProgressDialog.setMax(4535);
barProgressDialog.show();
for (int i = 0; i < _Length; i++) {
/*
* Update the progress on every 45 for 99 times
* reminder move to 100%
*
*/
barProgressDialog.incrementProgressBy(1);
if ( (i % 45) == 0)
{
progressPercent++;
barProgressDialog.incrementProgressBy(1);
}
if (progressPercent==99){
progressPercent++;
barProgressDialog.incrementProgressBy(1);
}
//
// split the csv string to columns
//
String[] pasuramsSplitString = _pasuramsTable_Records[i].split(",");
//
// store the values into collection
//
_pasuramsValues.put("paasuramnumber", pasuramsSplitString[0]);
_pasuramsValues.put("aayiram", pasuramsSplitString[2]);
_pasuramsValues.put("azhwaar", pasuramsSplitString[1]);
_pasuramsValues.put("category", pasuramsSplitString[3]);
_pasuramsValues.put("subcategory", pasuramsSplitString[4]);
_pasuramsValues.put("title", pasuramsSplitString[5]);
_pasuramsValues.put("titlenumber", pasuramsSplitString[6]);
_pasuramsValues.put("mangalasasanamon", pasuramsSplitString[7]);
_pasuramsValues.put("paasuram_en_str", pasuramsSplitString[8]);
if (pasuramsSplitString[1].equals("Poigai Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.poigai);
if (pasuramsSplitString[1].equals("Bhoodhath Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.bhoodath);
if (pasuramsSplitString[1].equals("Peya Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.pey);
if (pasuramsSplitString[1].equals("Tirumazhisai Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.thirumazhisai);
if (pasuramsSplitString[1].equals("Namm Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.nammalwar);
if (pasuramsSplitString[1].equals("Madhurakavi Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.madhurakavi);
if (pasuramsSplitString[1].equals("Kulasekara Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.kulasekara);
if (pasuramsSplitString[1].equals("PeriyAzhwaar"))
_pasuramsValues.put("imageid", R.drawable.perialwar);
if (pasuramsSplitString[1].equals("Andal"))
_pasuramsValues.put("imageid", R.drawable.andal);
if (pasuramsSplitString[1].equals("Thondaradippodi Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.thondaradipodi);
if (pasuramsSplitString[1].equals("Tiruppaan Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.tiruppan);
if (pasuramsSplitString[1].equals("Tirumangai Azhwaar"))
_pasuramsValues.put("imageid", R.drawable.tirumangai);
mDb.insert("pasurams", null, _pasuramsValues);
}
return null;
}
}
After that the progressdialog is display. Would like progressdialog to work while loop is on. Any help is appreciated
回答1:
you can use AsyncTask..
check this working code...
to call AsyncTask use new BackGround().execute();
private class BackGround extends AsyncTask < Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Instructions.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
// here is your background process...
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
if (pDialog.isShowing())
pDialog.dismiss();
}
}
来源：https://stackoverflow.com/questions/22985225/display-progress-while-doinbackground