- added EditContactsActivity

- if needed, ask permission to use microphone
- small layout improvements
- targetSdkVersion is not 25

app/src/main/java/com/tutpro/baresip/Utils.java

@@ -0,0 +1,55 @@
+package com.tutpro.baresip;
+
+import android.util.Log;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.OutputStreamWriter;
+
+public class Utils {
+
+    static public String getFileContents(File file) {
+        if (!file.exists()) {
+            Log.e("Baresip", "Failed to find file: " + file.getPath());
+            return "";
+        } else {
+            Log.e("Baresip", "Found file: " + file.getPath());
+            int length = (int) file.length();
+            byte[] bytes = new byte[length];
+            try {
+                FileInputStream in = new FileInputStream(file);
+                try {
+                    in.read(bytes);
+                } finally {
+                    in.close();
+                }
+                return new String(bytes);
+            } catch (java.io.IOException e) {
+                Log.e("Baresip", "Failed to read file: " + file.getPath() + ": " +
+                        e.toString());
+                return "";
+            }
+        }
+    }
+
+    static public void putFileContents(File file, String contents) {
+        try {
+            FileOutputStream fOut =
+                    new FileOutputStream(file.getAbsoluteFile(), false);
+            OutputStreamWriter fWriter = new OutputStreamWriter(fOut);
+            try {
+                fWriter.write(contents);
+                fWriter.close();
+                fOut.close();
+            } catch (java.io.IOException e) {
+                Log.e("Baresip", "Failed to put contents to file: " +
+                        e.toString());
+            }
+        } catch (java.io.FileNotFoundException e) {
+            Log.e("Baresip", "Failed to find contents file: " +
+                    e.toString());
+        }
+    }
+
+}