Java tutorial
package com.aokp.romcontrol.github.tasks; /* * Copyright (C) 2012 The Android Open Kang Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import android.app.ProgressDialog; import android.content.Context; import android.os.AsyncTask; import android.preference.Preference; import android.preference.PreferenceCategory; import android.preference.PreferenceScreen; import android.util.Log; import android.widget.ImageView; import com.aokp.romcontrol.R; import com.aokp.romcontrol.github.CommitViewerDialog; import com.aokp.romcontrol.github.Config; import com.aokp.romcontrol.github.objects.CommitObject; import com.aokp.romcontrol.github.objects.GithubObject; import org.apache.http.client.HttpClient; import org.apache.http.client.ResponseHandler; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.BasicResponseHandler; import org.apache.http.impl.client.DefaultHttpClient; import org.json.JSONArray; import org.json.JSONException; import java.io.IOException; /** * Displays most recent commits (30) for provided repository */ public class GetCommitsInProjectTask extends AsyncTask<String, Void, Void> { private final String TAG = getClass().getSimpleName(); private final boolean DEBUG = false; private final CommitViewerDialog mAlertDialog; private final PreferenceCategory mCategory; private final Context mContext; private final Config mConfig; private ProgressDialog mProgressDialog; String LAST_SHA_; String BRANCH_; String PROJECT_; /** * gets commits from provided project * @param context application context * @param preferenceCategory container to hold commit views */ public GetCommitsInProjectTask(Context context, PreferenceCategory preferenceCategory, CommitViewerDialog alertDialog) { mContext = context; mCategory = preferenceCategory; mConfig = new Config(); mAlertDialog = alertDialog; } // inner class constants final String DEFAULT_BRANCH = "jb"; // TODO find a way to handle 'jellybean' branches // at the same time // UI thread protected void onPreExecute() { // show commit after we load next set mCategory.setTitle(mContext.getString(R.string.loading_commits)); mCategory.setOrderingAsAdded(true); if (mProgressDialog == null) { mProgressDialog = new ProgressDialog(mAlertDialog.getContext()); ImageView imageView = new ImageView(mContext); imageView.setImageResource(R.drawable.octacat); mProgressDialog.show(); mProgressDialog.setContentView(R.layout.github_octacat); } } // worker thread protected Void doInBackground(String... params) { PROJECT_ = params[0]; LAST_SHA_ = params[1]; String requestCommits; if (LAST_SHA_ == null) { mCategory.removeAll(); requestCommits = String.format(mConfig.INITIAL_COMMITS_REQUEST_FORMAT, PROJECT_); } else { requestCommits = String.format(mConfig.COMMITS_REQUEST_FORMAT, PROJECT_, LAST_SHA_); } if (BRANCH_ == null) BRANCH_ = DEFAULT_BRANCH; try { HttpClient httpClient = new DefaultHttpClient(); Log.i(TAG, "attempting to connect to: " + requestCommits); HttpGet requestWebsite = new HttpGet(requestCommits); ResponseHandler<String> responseHandler = new BasicResponseHandler(); JSONArray projectCommitsArray = new JSONArray(httpClient.execute(requestWebsite, responseHandler)); // debugging if (DEBUG) Log.d(TAG, "projectCommitsArray.length() is: " + projectCommitsArray.length()); String lastSha = null; // make a PreferenceScreen for all commits in package for (int i = 0; i < projectCommitsArray.length(); i++) { // make an object of each commit try { final CommitObject commitObject = new GithubObject(projectCommitsArray.getJSONObject(i)); // if we are looking for the next set the we skip the first commit // as it is represented as the last commit from the first commit // loading loop //if (LAST_SHA_ != null && i == 1) { //continue; //} // debugging if (Config.StaticVars.JSON_SPEW) Log.d(TAG, "commitObject.toString() is: " + commitObject.toString()); if ("merge".contains(commitObject.getSubject().substring(0, 5).toLowerCase())) continue; PreferenceScreen mCommit = mCategory.getPreferenceManager().createPreferenceScreen(mContext); // apply info to our preference screen mCommit.setKey(commitObject.getCommitHash()); mCommit.setTitle(commitObject.getSubject()); mCommit.setSummary(commitObject.getAuthorName()); mCommit.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() { @Override public boolean onPreferenceClick(Preference p) { mAlertDialog.setCommitAndShow(commitObject); return true; } }); mCategory.addPreference(mCommit); // most recent non null sha hash will be to iterate throught commits list if (commitObject.getCommitHash() != null) { lastSha = commitObject.getCommitHash(); } } catch (JSONException je) { // no author found for commit if (DEBUG) Log.d(TAG, "encountered a null value", je); } } if (projectCommitsArray.length() == 100) { // append next 100 commits onClick() final PreferenceScreen mNext = mCategory.getPreferenceManager().createPreferenceScreen(mContext); mNext.setTitle(mContext.getString(R.string.next_commits_page_title)); mNext.setSummary(mContext.getString(R.string.next_commits_page_summary)); final String finalString = lastSha; mNext.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() { @Override public boolean onPreferenceClick(Preference p) { GetCommitsInProjectTask nextList = new GetCommitsInProjectTask(mContext, mCategory, mAlertDialog); Log.d(TAG, "Sending project: " + PROJECT_ + " with last sha of " + finalString); nextList.execute(PROJECT_, finalString); // remove last entry it will be first entry in next list mCategory.removePreference(mCategory.findPreference(finalString)); // don't keep in list after we click mCategory.removePreference(mNext); return true; } }); mCategory.addPreference(mNext); } } catch (JSONException je) { if (DEBUG) Log.e(TAG, "Bad json interaction...", je); } catch (IOException ioe) { if (DEBUG) Log.e(TAG, "IOException...", ioe); } catch (NullPointerException ne) { if (DEBUG) Log.e(TAG, "NullPointer...", ne); } return null; } // UI thread protected void onPostExecute(Void unused) { mCategory.setTitle(mContext.getString(R.string.commits_title)); if (mProgressDialog != null && mProgressDialog.isShowing()) mProgressDialog.dismiss(); } }