在Android中完成Java类方法时设置进度栏 [英] Set Progress Bar when Java Class Method is Complete in android
本文介绍了在Android中完成Java类方法时设置进度栏的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在使用非活动类填充Framelayout。我想在Framelayout加载时显示进度条，并在Framelayout
加载完成后隐藏。
I'm using non activity class to populate Framelayout. I want to show the progress bar when the Framelayout is loading and hide once it is Framelayout loading is complete.
我有Activity Class的经验，但是我无法显示或隐藏非活动类的进度栏
I have experience with Activity Class but I was unable to show or hide progress bar with non -activity class
我在应用启动时首先调用此方法
I'm calling this method first when app is started
private static void getMovies(final Activity activity, final String type, final MoviesCallback callback)
这是我的班级代码
public class MoviesUtil {
private static final Webb WEBB = Webb.create();
private static final String TMDB_API_MOVIES_URL = "http://api.themoviedb.org/3/movie/%s?api_key=%s&page=%s";
private static final String TMDB_API_VIDEOS_URL = "http://api.themoviedb.org/3/movie/%s/videos?api_key=%s";
private static final String TMDB_API_REVIEWS_URL = "http://api.themoviedb.org/3/movie/%s/reviews?api_key=%s";
private static final String TMDB_POSTER_URL = "https://image.tmdb.org/t/p/w185%s";
private static final String TMDB_BACKDROP_URL = "https://image.tmdb.org/t/p/w300%s";
private static final String TYPE_POPULAR = "popular";
private static final String TYPE_TOP_RATED = "top_rated";
private static final String TYPE_FAVORITES = "favorites";
private static ProgressDialog progressDialog;
public static boolean isFavorite(Context context, Movie movie) {
Cursor cursor = context.getContentResolver()
.query(MovieContract.CONTENT_URI,
null,
String.format("%s = ? and %s = ?", MovieContract.MOVIE_ID, MovieContract.TYPE),
new String[]{movie.getId() + "", TYPE_FAVORITES},
null
);
boolean isFavorite = cursor.getCount() > 0;
cursor.close();
return isFavorite;
}
public static boolean toggleFavorite(Context context, Movie movie) {
if (isFavorite(context, movie)) {
deleteMovie(context, TYPE_FAVORITES, movie);
return false;
} else {
saveMovie(context, TYPE_FAVORITES, movie);
return true;
}
}
public static void getPopularMovies(Activity activity, MoviesCallback callback) {
getMovies(activity, TYPE_POPULAR, callback);
}
public static void getTopRatedMovies(Activity activity, MoviesCallback callback) {
getMovies(activity, TYPE_TOP_RATED, callback);
}
public static void getFavoritesMovies(Activity activity, MoviesCallback callback) {
getMovies(activity, TYPE_FAVORITES, callback);
}
private static void getMovies(final Activity activity, final String type, final MoviesCallback callback) {
AsyncTask.execute(new Runnable() {
@Override
public void run() {
if (Util.isConnected(activity, false) && !type.equals(TYPE_FAVORITES)) {
getMoviesFromApi(activity, type);
}
getMoviesFromDb(activity, type, callback);
progressDialog = new ProgressDialog(activity);
progressDialog.setMax(100);
progressDialog.setMessage("Its loading....");
progressDialog.setTitle("ProgressDialog bar example");
progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progressDialog.show();
}
});
}
private static void getMoviesFromApi(Activity activity, String type) {
String apiUrl = String.format(TMDB_API_MOVIES_URL, type, activity.getString(R.string.tmdb_api_key), 1);
try {
JSONArray moviesJson = WEBB.get(apiUrl)
.asJsonObject()
.getBody()
.getJSONArray("results");
List<Movie> movies = toMovies(activity, moviesJson);
deleteMovies(activity, type);
saveMovies(activity, type, movies);
} catch (JSONException e) {
e.printStackTrace();
}
}
private static void getMoviesFromDb(Activity activity, String type, final MoviesCallback callback) {
try {
Cursor cursor = activity.getContentResolver()
.query(MovieContract.CONTENT_URI,
null,
MovieContract.TYPE + " = ?",
new String[]{type},
null
);
final List<Movie> movies = toMovies(cursor);
cursor.close();
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
callback.success(movies);
progressDialog.dismiss();
}
});
} catch (final Exception e) {
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
callback.error(e);
}
});
}
}
public static void getReviewsFromApi(final Activity activity, final Movie movie, final ReviewsCallback callback) {
if (Util.isConnected(activity, false)) {
AsyncTask.execute(new Runnable() {
@Override
public void run() {
String apiUrl = String.format(TMDB_API_REVIEWS_URL, movie.getId(), activity.getString(R.string.tmdb_api_key));
final List<Review> reviews = new ArrayList<>();
try {
JSONArray reviewsJson = WEBB.get(apiUrl)
.asJsonObject()
.getBody()
.getJSONArray("results");
reviews.addAll(toReviews(reviewsJson));
} catch (final Exception e) {
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
callback.error(e);
}
});
}
if (reviews.isEmpty()) {
Review review = new Review();
review.setContent(activity.getString(R.string.no_review_found));
reviews.add(review);
}
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
callback.success(reviews);
}
});
}
});
} else {
Review review = new Review();
review.setContent(activity.getString(R.string.conn_internet));
final List<Review> reviews = new ArrayList<>();
reviews.add(review);
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
callback.success(reviews);
}
});
}
}
private static void saveMovie(final Context context, final String type, final Movie movie) {
AsyncTask.execute(new Runnable() {
@Override
public void run() {
List<Movie> movies = new ArrayList<>();
movies.add(movie);
saveMovies(context, type, movies);
}
});
}
private static void saveMovies(Context context, String type, List<Movie> movies) {
if (movies != null) {
ContentValues[] moviesValues = new ContentValues[movies.size()];
for (int i = 0; i < movies.size(); i++) {
try {
Movie movie = movies.get(i);
ContentValues movieValues = new ContentValues();
movieValues.put(MovieContract.MOVIE_ID, movie.getId());
movieValues.put(MovieContract.TYPE, type);
movieValues.put(MovieContract.TITLE, movie.getTitle());
movieValues.put(MovieContract.OVERVIEW, movie.getOverview());
movieValues.put(MovieContract.POSTER_URL, movie.getPosterUrl());
movieValues.put(MovieContract.BACKDROP_URL, movie.getBackdropUrl());
movieValues.put(MovieContract.TRAILER_URL, movie.getTrailerUrl());
movieValues.put(MovieContract.RELEASE_DATE, Util.toDbDate(movie.getReleaseDate()));
movieValues.put(MovieContract.RATING, movie.getRating());
movieValues.put(MovieContract.ADULT, movie.isAdult() ? 1 : 0);
moviesValues[i] = movieValues;
} catch (Exception ignore) {
}
}
context.getContentResolver()
.bulkInsert(MovieContract.CONTENT_URI, moviesValues);
}
}
private static void deleteMovie(final Context context, final String type, final Movie movie) {
AsyncTask.execute(new Runnable() {
@Override
public void run() {
context.getContentResolver()
.delete(MovieContract.CONTENT_URI,
MovieContract.MOVIE_ID + " = ? and " + MovieContract.TYPE + " = ?",
new String[]{movie.getId() + "", type});
}
});
}
private static void deleteMovies(final Context context, final String type) {
AsyncTask.execute(new Runnable() {
@Override
public void run() {
context.getContentResolver()
.delete(MovieContract.CONTENT_URI,
MovieContract.TYPE + " = ?",
new String[]{type});
}
});
}
private static List<Movie> toMovies(Cursor cursor) {
List<Movie> movies = new ArrayList<>();
while (cursor.moveToNext()) {
Movie movie = new Movie();
movie.setId(cursor.getInt(
cursor.getColumnIndex(MovieContract.MOVIE_ID)));
movie.setTitle(cursor.getString(
cursor.getColumnIndex(MovieContract.TITLE)));
movie.setOverview(cursor.getString(
cursor.getColumnIndex(MovieContract.OVERVIEW)));
movie.setPosterUrl(cursor.getString(
cursor.getColumnIndex(MovieContract.POSTER_URL)));
movie.setBackdropUrl(cursor.getString(
cursor.getColumnIndex(MovieContract.BACKDROP_URL)));
movie.setTrailerUrl(cursor.getString(
cursor.getColumnIndex(MovieContract.TRAILER_URL)));
movie.setReleaseDate(Util.toDate(cursor.getString(
cursor.getColumnIndex(MovieContract.RELEASE_DATE))));
movie.setRating(cursor.getFloat(
cursor.getColumnIndex(MovieContract.RATING)));
movie.setAdult(cursor.getInt(
cursor.getColumnIndex(MovieContract.ADULT)) == 1);
movies.add(movie);
}
return movies;
}
private static List<Movie> toMovies(Context context, JSONArray jsonMovies) {
List<Movie> movies = new ArrayList<>();
if (jsonMovies != null) {
for (int i = 0; i < jsonMovies.length(); i++) {
try {
JSONObject jsonMovie = jsonMovies.getJSONObject(i);
int movieId = jsonMovie.getInt("id");
Movie movie = new Movie();
movie.setId(movieId);
movie.setTitle(jsonMovie.getString("title"));
movie.setOverview(jsonMovie.getString("overview"));
movie.setPosterUrl(String.format(TMDB_POSTER_URL, jsonMovie.getString("poster_path")));
movie.setBackdropUrl(String.format(TMDB_BACKDROP_URL, jsonMovie.getString("backdrop_path")));
movie.setTrailerUrl(getTrailerUrl(context, movieId));
movie.setReleaseDate(Util.toDate(jsonMovie.getString("release_date")));
movie.setRating((float) jsonMovie.getDouble("vote_average"));
movie.setAdult(jsonMovie.getBoolean("adult"));
movies.add(movie);
} catch (Exception e) {
e.printStackTrace();
}
}
}
return movies;
}
private static List<Review> toReviews(JSONArray jsonReviews) {
List<Review> reviews = new ArrayList<>();
if (jsonReviews != null) {
for (int i = 0; i < jsonReviews.length(); i++) {
try {
JSONObject jsonReview = jsonReviews.getJSONObject(i);
Review review = new Review();
review.setAuthor(jsonReview.getString("author"));
review.setContent(jsonReview.getString("content"));
reviews.add(review);
} catch (Exception e) {
e.printStackTrace();
}
}
}
return reviews;
}
private static String getTrailerUrl(Context context, int movieId) {
String apiUrl = String.format(TMDB_API_VIDEOS_URL, movieId, context.getString(R.string.tmdb_api_key));
try {
JSONArray trailersJson = WEBB.get(apiUrl)
.asJsonObject()
.getBody()
.getJSONArray("results");
for (int i = 0; i < trailersJson.length(); i++) {
JSONObject trailerJson = trailersJson.getJSONObject(i);
if (trailerJson.getString("site").toLowerCase().equals("youtube")) {
return "https://youtube.com/watch?v=" + trailerJson.getString("key");
}
}
return "";
} catch (Exception e) {
e.printStackTrace();
return "";
}
}
}
我该怎么做。
感谢您的任何帮助，并在此先致以谢意。
Any help is appreciated and Thankss in advance.
而我的日志猫错误是
09-05 20:10:57.639 2183-2891/? E/GpsXtraDownloader: No XTRA servers were specified in the GPS configuration
09-05 20:10:58.319 9101-9101/com.nepalpolice.cinemaghar E/dalvikvm: Could not find class 'android.graphics.drawable.RippleDrawable', referenced from method android.support.v7.widget.AppCompatImageHelper.hasOverlappingRendering
09-05 20:10:58.359 9101-9101/com.nepalpolice.cinemaghar E/Iconics: Wrong icon name: 2131165281
09-05 20:10:58.600 9101-9101/com.nepalpolice.cinemaghar E/RecyclerView: No adapter attached; skipping layout
No adapter attached; skipping layout
No adapter attached; skipping layout
09-05 20:10:58.790 9101-9101/com.nepalpolice.cinemaghar E/RecyclerView: No adapter attached; skipping layout
No adapter attached; skipping layout
No adapter attached; skipping layout
09-05 20:11:06.758 9101-9101/com.nepalpolice.cinemaghar E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.nepalpolice.cinemaghar, PID: 9101
java.lang.NullPointerException
at com.nepalpolice.cinemaghar.util.MoviesUtil$2.run(MoviesUtil.java:138)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5018)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
推荐答案
解决方案：
而不是：
ProgressBar progressBar;
写：
ProgressDialog progressDialog;
修改：
private static void getMovies(final Activity activity, final String type, final MoviesCallback callback) {
AsyncTask.execute(new Runnable() {
@Override
public void run() {
if (Util.isConnected(activity, false) && !type.equals(TYPE_FAVORITES)) {
getMoviesFromApi(activity, type);
}
getMoviesFromDb(activity, type, callback);
progressDialog = new ProgressDialog(activity);
progressDialog.setMax(100);
progressDialog.setMessage("Its loading....");
progressDialog.setTitle("ProgressDialog bar example");
progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
progressDialog.show();
}
});
}
然后在此处添加：
final List<Movie> movies = toMovies(cursor);
cursor.close();
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
callback.success(movies);
.........(Write Here)
}
});
此：
progressDialog.dismiss();
让我知道它是否有效。
这篇关于在Android中完成Java类方法时设置进度栏的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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