Allow to change disk log destination

README.md

@@ -94,6 +94,19 @@ FormatStrategy formatStrategy = CsvFormatStrategy.newBuilder()
 Logger.addLogAdapter(new DiskLogAdapter(formatStrategy));
 ```
 
+Set custom logging destination
+```java
+LogStrategy logStrategy = DiskLogStrategy.newBuilder()
+  .directory("/sdcard/my/awesome/destination")
+  .build();
+
+FormatStrategy formatStrategy = CsvFormatStrategy.newBuilder()
+  .logStrategy(logStrategy)
+  .build();
+
+Logger.addLogAdapter(new DiskLogAdapter(formatStrategy));
+```
+
 ### How it works
 <img src='https://github.com/orhanobut/logger/blob/master/art/how_it_works.png'/>
 

logger/src/main/java/com/orhanobut/logger/CsvFormatStrategy.java

@@ -1,12 +1,8 @@
 package com.orhanobut.logger;
 
-import android.os.Environment;
-import android.os.Handler;
-import android.os.HandlerThread;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
-import java.io.File;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.Locale;
@@ -88,8 +84,6 @@ private CsvFormatStrategy(@NonNull Builder builder) {
   }
 
   public static final class Builder {
-    private static final int MAX_BYTES = 500 * 1024; // 500K averages to a 4000 lines per file
-
     Date date;
     SimpleDateFormat dateFormat;
     LogStrategy logStrategy;
@@ -126,13 +120,7 @@ private Builder() {
         dateFormat = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss.SSS", Locale.UK);
       }
       if (logStrategy == null) {
-        String diskPath = Environment.getExternalStorageDirectory().getAbsolutePath();
-        String folder = diskPath + File.separatorChar + "logger";
-
-        HandlerThread ht = new HandlerThread("AndroidFileLogger." + folder);
-        ht.start();
-        Handler handler = new DiskLogStrategy.WriteHandler(ht.getLooper(), folder, MAX_BYTES);
-        logStrategy = new DiskLogStrategy(handler);
+        logStrategy = DiskLogStrategy.newBuilder().build();
       }
       return new CsvFormatStrategy(this);
     }

logger/src/main/java/com/orhanobut/logger/DiskLogStrategy.java

@@ -1,6 +1,8 @@
 package com.orhanobut.logger;
 
+import android.os.Environment;
 import android.os.Handler;
+import android.os.HandlerThread;
 import android.os.Looper;
 import android.os.Message;
 import android.support.annotation.NonNull;
@@ -22,6 +24,11 @@ public class DiskLogStrategy implements LogStrategy {
 
   @NonNull private final Handler handler;
 
+  @NonNull
+  public static Builder newBuilder() {
+    return new Builder();
+  }
+
   public DiskLogStrategy(@NonNull Handler handler) {
     this.handler = checkNotNull(handler);
   }
@@ -113,4 +120,60 @@ private File getLogFile(@NonNull String folderName, @NonNull String fileName) {
       return newFile;
     }
   }
+
+  public static final class Builder {
+    private static final int MAX_BYTES = 500 * 1024; // 500K averages to a 4000 lines per file
+
+    String directory;
+    HandlerThread ht;
+    Handler handler;
+
+    private Builder() {
+    }
+
+    /**
+     * Set the log destination directory
+     * The default destination will be used if not supplied
+     */
+    @NonNull public Builder directory(@NonNull String directory) {
+      this.directory = directory;
+      return this;
+    }
+
+    /**
+     * Set the {@link HandlerThread} which handles this strategy
+     * A default {@link HandlerThread} will be created if not supplied
+     */
+    @NonNull public Builder handlerThread(@NonNull HandlerThread ht) {
+      this.ht = ht;
+      return this;
+    }
+
+    /**
+     * Set the {@link Handler}
+     * A default {@link Handler} will be created if not supplied
+     */
+    @NonNull public Builder handler(@NonNull Handler handler) {
+      this.handler = handler;
+      return this;
+    }
+
+    /**
+     * Create the {@link DiskLogStrategy} given the configuration
+     */
+    @NonNull public DiskLogStrategy build() {
+      if (directory == null) {
+        String diskPath = Environment.getExternalStorageDirectory().getAbsolutePath();
+        directory = diskPath + File.separatorChar + "logger";
+      }
+      if (ht == null) {
+        ht = new HandlerThread("AndroidFileLogger." + directory);
+        ht.start();
+      }
+      if (handler == null) {
+        handler = new DiskLogStrategy.WriteHandler(ht.getLooper(), directory, MAX_BYTES);
+      }
+      return new DiskLogStrategy(handler);
+    }
+  }
 }

logger/src/test/java/com.orhanobut.logger/DiskLogStrategyTest.kt

@@ -12,7 +12,8 @@ class DiskLogStrategyTest {
 
   @Test fun log() {
     val handler = mock(Handler::class.java)
-    val logStrategy = DiskLogStrategy(handler)
+
+    val logStrategy = DiskLogStrategy.newBuilder().handler(handler).build()
 
     logStrategy.log(DEBUG, "tag", "message")