Attempt to fix selector memeory leak. Add update checker

common/src/main/java/com/stardust/pio/PReadableTextFile.java

@@ -0,0 +1,105 @@
+package com.stardust.pio;
+
+import java.io.*;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by Stardust on 2017/4/1.
+ */
+
+public class PReadableTextFile extends PFile {
+
+    private BufferedReader mBufferedReader;
+    private FileInputStream mFileInputStream;
+    private int mBufferingSize;
+    private String mEncoding;
+
+    public PReadableTextFile(String path) {
+        this(path, PFile.DEFAULT_ENCODING);
+    }
+
+    public PReadableTextFile(String path, String encoding) {
+        this(path, encoding, -1);
+    }
+
+    public PReadableTextFile(String path, String encoding, int bufferingSize) {
+        mEncoding = encoding;
+        mBufferingSize = bufferingSize;
+        try {
+            mFileInputStream = new FileInputStream(path);
+        } catch (FileNotFoundException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+
+    private void ensureBufferReader() {
+        if (mBufferedReader == null) {
+            try {
+                if (mBufferingSize == -1)
+                    mBufferedReader = new BufferedReader(new InputStreamReader(mFileInputStream, mEncoding));
+                else
+                    mBufferedReader = new BufferedReader(new InputStreamReader(mFileInputStream, mEncoding), mBufferingSize);
+            } catch (UnsupportedEncodingException e) {
+                throw new UncheckedIOException(e);
+            }
+
+        }
+    }
+
+    public String read() {
+        try {
+            byte[] data = new byte[mFileInputStream.available()];
+            mFileInputStream.read(data);
+            return new String(data, mEncoding);
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    public String read(int size) {
+        ensureBufferReader();
+        try {
+            char[] chars = new char[size];
+            int len = mBufferedReader.read(chars);
+            return new String(chars, 0, len);
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    public String readline() {
+        ensureBufferReader();
+        try {
+            return mBufferedReader.readLine();
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    public String[] readlines() {
+        ensureBufferReader();
+        List<String> lines = new ArrayList<>();
+        try {
+            while (mBufferedReader.ready()) {
+                lines.add(mBufferedReader.readLine());
+            }
+            return lines.toArray(new String[lines.size()]);
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    public void close() {
+        try {
+            if (mBufferedReader != null) {
+                mBufferedReader.close();
+            } else {
+                mFileInputStream.close();
+            }
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+}