Android Open Source - pdsql File Util

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License

The source code is released under:

Apache License

Java Source Code

package com.piscessera.pdsql.utils;
//from  w w  w . jav a 2s . c  o m
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;

import android.app.Application;
import android.content.Context;
import android.content.res.AssetManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

public class FileUtil extends Application {
  public static final String CONTEXT_NAME = "homeaccount.dat";
  private Context mContext;

  public FileUtil(Context mContext) {
    super();
    this.mContext = mContext;
  }

  public static String convertIs2String(InputStream var) {
    String result = "";
    try {

      BufferedReader br = new BufferedReader(new InputStreamReader(var,
          "utf-8"), 8);

      StringBuffer sb = new StringBuffer();

      String line = null;

      while ((line = br.readLine()) != null) {
        sb.append(line);
      }

      result = sb.toString();

    } catch (Exception e) {
      e.printStackTrace();
    }
    return result;
  }

  public boolean saveContextFile(String fileName, String text) {
    boolean result = false;
    try {
      FileOutputStream fos = mContext.openFileOutput(fileName,
          MODE_PRIVATE);
      fos.write(text.getBytes());
      fos.close();
      result = true;
    } catch (Exception e) {
      e.printStackTrace();
      result = false;
    }
    return result;
  }

  public InputStream getContextFile(String fileName) {
    InputStream result = null;
    try {
      result = mContext.openFileInput(fileName);
    } catch (Exception e) {
      e.printStackTrace();
      result = null;
    }
    return result;
  }

  public String getContextContent(String fileName) {
    String result = "";
    result = convertIs2String(getContextFile(fileName));
    return result;
  }

  private void copyFile(InputStream in, OutputStream out) throws IOException {
    byte[] buffer = new byte[1024];
    int read;
    while ((read = in.read(buffer)) != -1) {
      out.write(buffer, 0, read);
    }
  }

  public void copyAssets(AssetManager assets) {
    AssetManager assetManager = assets;
    String[] files = null;
    try {
      files = assetManager.list("");
    } catch (IOException e) {
      DebugUtil.e(e.getMessage());
    }
    for (int i = 0; i < files.length; i++) {
      InputStream in = null;
      OutputStream out = null;
      try {
        in = assetManager.open(files[i]);
        out = new FileOutputStream("/sdcard/" + files[i]);
        copyFile(in, out);
        in.close();
        in = null;
        out.flush();
        out.close();
        out = null;
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }

  public void copyAssets(AssetManager assets, String folder) {
    AssetManager assetManager = assets;
    String[] files = null;
    try {
      files = assetManager.list("");
    } catch (IOException e) {
      DebugUtil.e(e.getMessage());
    }

    File directory = new File("/sdcard/" + folder + "/");
    if (!directory.exists()) {
      // Create directory
      directory.mkdirs();
    }

    for (int i = 0; i < files.length; i++) {
      InputStream in = null;
      OutputStream out = null;
      try {
        in = assetManager.open(files[i]);
        out = new FileOutputStream("/sdcard/" + folder + "/" + files[i]);
        copyFile(in, out);
        in.close();
        in = null;
        out.flush();
        out.close();
        out = null;
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }

  public void copyAssets(String fileName, String target) {
    InputStream in = null;
    OutputStream out = null;
    try {
      in = mContext.getAssets().open(fileName);
      out = new FileOutputStream(target + fileName);
      copyFile(in, out);
      in.close();
      in = null;
      out.flush();
      out.close();
      out = null;
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public void copyFileManual(String targetFile, String path, String fileName) {
    try {
      // Open local db as the input stream
      InputStream in = new FileInputStream(targetFile);

      // Path
      String outFileName = path + fileName;

      // Open the db as the output stream
      OutputStream out = new FileOutputStream(outFileName);

      // Transfer bytes from the inputfile to the outputfile
      copyFile(in, out);

      // Close the streams
      in.close();
      in = null;
      out.flush();
      out.close();
      out = null;
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public void copyFileManual(AssetManager assets, String path, String fileName) {
    try {
      // Open local db as the input stream
      InputStream in = assets.open(fileName);

      // Path
      String outFileName = path + fileName;

      // Open the db as the output stream
      OutputStream out = new FileOutputStream(outFileName);

      // Transfer bytes from the inputfile to the outputfile
      copyFile(in, out);

      // Close the streams
      in.close();
      in = null;
      out.flush();
      out.close();
      out = null;
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public void deleteFileIfExist(String absolutePath) {
    File file = new File(absolutePath);
    if (file.exists()) {
      file.delete();
    }
  }

  public Bitmap getBitmapFromAsset(String fileName, boolean setOption) {
    BitmapFactory.Options options = new BitmapFactory.Options();
    if (setOption) {
      options.inSampleSize = 8;
    }
    Bitmap bitmap = null;
    InputStream in;
    try {
      in = mContext.getAssets().open(fileName);
      bitmap = BitmapFactory.decodeStream(in, null, options);
      in.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
    return bitmap;
  }

  public Bitmap getBitmapFromAsset(String fileName, int sampleSize) {
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inSampleSize = sampleSize;
    Bitmap bitmap = null;
    InputStream in;
    try {
      in = mContext.getAssets().open(fileName);
      bitmap = BitmapFactory.decodeStream(in, null, options);
      in.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
    return bitmap;
  }
}

Java Source Code List

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