Java tutorial
/* * Copyright (C) 2014 Philippine Android Developers Community * * 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 ANYND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package ph.devcon.android.util; import android.content.Context; import android.graphics.Bitmap; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.support.v8.renderscript.Allocation; import android.support.v8.renderscript.Element; import android.support.v8.renderscript.RenderScript; import android.support.v8.renderscript.ScriptIntrinsicBlur; import android.text.Html; import android.text.TextUtils; import android.util.Log; import android.view.View; import android.widget.TextView; import com.google.common.base.Strings; import com.google.common.html.HtmlEscapers; import com.j256.ormlite.db.DatabaseType; import com.j256.ormlite.field.FieldType; import com.j256.ormlite.stmt.StatementBuilder; import com.j256.ormlite.support.CompiledStatement; import com.j256.ormlite.support.ConnectionSource; import com.j256.ormlite.support.DatabaseConnection; import com.squareup.picasso.Transformation; import java.io.IOException; import java.sql.SQLException; import retrofit.client.Response; import retrofit.mime.MimeUtil; import retrofit.mime.TypedByteArray; import retrofit.mime.TypedInput; /** * Created by lope on 10/6/14. */ public class Util { public static boolean isNullOrEmpty(String s) { return Strings.isNullOrEmpty(s); } public static String nullToEmpty(String s) { return Strings.nullToEmpty(s); } public static String toTime(int section) { switch (section) { case 0: return "08:00 AM"; case 1: return "09:00 AM"; case 2: return "10:00 AM"; case 3: return "11:00 AM"; case 4: return "12:00 NN"; case 5: return "01:00 PM"; case 6: return "02:00 PM"; case 7: return "03:00 PM"; case 8: return "04:00 PM"; default: return "UNKNOWN"; } } public static String toSponsorType(int section) { switch (section) { case 0: return "Co-Presentors"; case 1: return "Gold Sponsors"; case 2: return "Silver Sponsors"; case 3: return "Community Partner"; default: return "UNKNOWN"; } } public static Boolean isNetworkAvailable(Context context) { ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo activeNetwork = cm.getActiveNetworkInfo(); return activeNetwork != null && activeNetwork.isConnectedOrConnecting(); } public static String getBodyString(Response response) throws IOException { TypedInput body = response.getBody(); if (body != null) { byte[] bodyBytes = ((TypedByteArray) body).getBytes(); String bodyMime = body.mimeType(); String bodyCharset = MimeUtil.parseCharset(bodyMime); return new String(bodyBytes, bodyCharset); } return null; } /** * https://plus.google.com/+MarioViviani/posts/fhuzYkji9zz * * @param context * @param bitmap * @return */ public static Bitmap blurBitmap(Context context, Bitmap bitmap) { //Let's create an empty bitmap with the same size of the bitmap we want to blur Bitmap outBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888); //Instantiate a new Renderscript RenderScript rs = RenderScript.create(context); //Create an Intrinsic Blur Script using the Renderscript ScriptIntrinsicBlur blurScript = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); //Create the in/out Allocations with the Renderscript and the in/out bitmaps Allocation allIn = Allocation.createFromBitmap(rs, bitmap); Allocation allOut = Allocation.createFromBitmap(rs, outBitmap); //Set the radius of the blur blurScript.setRadius(25.f); //Perform the Renderscript blurScript.setInput(allIn); blurScript.forEach(allOut); //Copy the final bitmap created by the out Allocation to the outBitmap allOut.copyTo(outBitmap); //recycle the original bitmap bitmap.recycle(); //After finishing everything, we destroy the Renderscript. rs.destroy(); return outBitmap; } public static String escapeHtml(String htmlString) { if (!isNullOrEmpty(htmlString)) return HtmlEscapers.htmlEscaper().escape(htmlString); else return ""; } public static String stripHtml(String htmlString) { if (!isNullOrEmpty(htmlString)) return Html.fromHtml(htmlString).toString(); else return ""; } public static void emptyToGone(TextView textView) { if (TextUtils.isEmpty(textView.getText())) { textView.setVisibility(View.GONE); } } public static void emptyToGone(TextView... textViews) { for (TextView textView : textViews) { emptyToGone(textView); } } public static void emptyToDefault(TextView textView, String defaultText) { if (TextUtils.isEmpty(textView.getText())) { textView.setText(defaultText); } } public static int clearTable(ConnectionSource connectionSource, String tableName) throws SQLException { FieldType[] noFieldTypes = new FieldType[0]; DatabaseType databaseType = connectionSource.getDatabaseType(); StringBuilder sb = new StringBuilder(48); if (databaseType.isTruncateSupported()) { sb.append("TRUNCATE TABLE "); } else { sb.append("DELETE FROM "); } databaseType.appendEscapedEntityName(sb, tableName); String statement = sb.toString(); Log.i("DatabaseHelper", "clearing table '" + tableName + "' with '" + statement + "'"); CompiledStatement compiledStmt = null; DatabaseConnection connection = connectionSource.getReadWriteConnection(); try { compiledStmt = connection.compileStatement(statement, StatementBuilder.StatementType.EXECUTE, noFieldTypes, DatabaseConnection.DEFAULT_RESULT_FLAGS); return compiledStmt.runExecute(); } finally { if (compiledStmt != null) { compiledStmt.close(); } connectionSource.releaseConnection(connection); } } public static class BlurTransformation implements Transformation { Context context; public BlurTransformation(Context context) { this.context = context; } @Override public Bitmap transform(Bitmap bitmap) { return blurBitmap(context, bitmap); } @Override public String key() { return "blur()"; } } }