Anthony Restaino
8 years ago
5 changed files with 129 additions and 30 deletions
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package acr.browser.lightning.utils; |
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import android.app.Application; |
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import android.os.Bundle; |
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import android.os.Parcel; |
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import android.support.annotation.Nullable; |
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import android.util.Log; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.FileNotFoundException; |
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import java.io.FileOutputStream; |
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import java.io.IOException; |
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import acr.browser.lightning.constant.Constants; |
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/** |
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* A utility class containing helpful methods |
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* pertaining to file storage. |
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*/ |
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public class FileUtils { |
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/** |
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* Writes a bundle to persistent storage in the files directory |
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* using the specified file name. This method is a blocking |
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* operation. |
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* |
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* @param app the application needed to obtain the file directory. |
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* @param bundle the bundle to store in persistent storage. |
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* @param name the name of the file to store the bundle in. |
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*/ |
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public static void writeBundleToStorage(Application app, Bundle bundle, String name) { |
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File outputFile = new File(app.getFilesDir(), name); |
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FileOutputStream outputStream = null; |
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try { |
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//noinspection IOResourceOpenedButNotSafelyClosed
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outputStream = new FileOutputStream(outputFile); |
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Parcel parcel = Parcel.obtain(); |
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parcel.writeBundle(bundle); |
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outputStream.write(parcel.marshall()); |
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outputStream.flush(); |
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parcel.recycle(); |
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} catch (IOException e) { |
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Log.e(Constants.TAG, "Unable to write bundle to storage"); |
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} finally { |
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Utils.close(outputStream); |
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} |
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} |
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/** |
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* Reads a bundle from the file with the specified |
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* name in the peristent storage files directory. |
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* This method is a blocking operation. |
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* |
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* @param app the application needed to obtain the files directory. |
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* @param name the name of the file to read from. |
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* @return a valid Bundle loaded using the system class loader |
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* or null if the method was unable to read the Bundle from storage. |
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*/ |
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@Nullable |
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public static Bundle readBundleFromStorage(Application app, String name) { |
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File inputFile = new File(app.getFilesDir(), name); |
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FileInputStream inputStream = null; |
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try { |
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//noinspection IOResourceOpenedButNotSafelyClosed
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inputStream = new FileInputStream(inputFile); |
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Parcel parcel = Parcel.obtain(); |
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byte[] data = new byte[(int) inputStream.getChannel().size()]; |
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//noinspection ResultOfMethodCallIgnored
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inputStream.read(data, 0, data.length); |
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parcel.unmarshall(data, 0, data.length); |
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parcel.setDataPosition(0); |
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Bundle out = parcel.readBundle(ClassLoader.getSystemClassLoader()); |
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out.putAll(out); |
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parcel.recycle(); |
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return out; |
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} catch (FileNotFoundException e) { |
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Log.e(Constants.TAG, "Unable to read bundle from storage"); |
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} catch (IOException e) { |
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e.printStackTrace(); |
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} finally { |
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//noinspection ResultOfMethodCallIgnored
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inputFile.delete(); |
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Utils.close(inputStream); |
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} |
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return null; |
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} |
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} |
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