add breadcrumbs

app/src/main/java/com/simplemobiletools/filemanager/Breadcrumbs.java

@@ -0,0 +1,107 @@
+package com.simplemobiletools.filemanager;
+
+import android.content.Context;
+import android.graphics.Point;
+import android.util.AttributeSet;
+import android.view.Display;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.WindowManager;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+public class Breadcrumbs extends LinearLayout {
+    private LayoutInflater mInflater;
+    private int mDeviceWidth;
+
+    public Breadcrumbs(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init(context);
+    }
+
+    private void init(Context context) {
+        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        final Display display = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
+        final Point deviceDisplay = new Point();
+        display.getSize(deviceDisplay);
+        mDeviceWidth = deviceDisplay.x;
+    }
+
+    @Override
+    protected void onLayout(boolean changed, int l, int t, int r, int b) {
+        final int paddingTop = getPaddingTop();
+        final int paddingLeft = getPaddingLeft();
+        final int childRight = getMeasuredWidth() - getPaddingRight();
+        final int childBottom = getMeasuredHeight() - getPaddingBottom();
+        final int childHeight = childBottom - paddingTop;
+
+        final int usableWidth = mDeviceWidth - paddingLeft - getPaddingRight();
+        int maxHeight = 0;
+        int curWidth;
+        int curHeight;
+        int curLeft = paddingLeft;
+        int curTop = paddingTop;
+
+        final int cnt = getChildCount();
+        for (int i = 0; i < cnt; i++) {
+            final View child = getChildAt(i);
+
+            child.measure(MeasureSpec.makeMeasureSpec(usableWidth, MeasureSpec.AT_MOST),
+                    MeasureSpec.makeMeasureSpec(childHeight, MeasureSpec.AT_MOST));
+            curWidth = child.getMeasuredWidth();
+            curHeight = child.getMeasuredHeight();
+
+            if (curLeft + curWidth >= childRight) {
+                curLeft = paddingLeft;
+                curTop += maxHeight;
+                maxHeight = 0;
+            }
+
+            child.layout(curLeft, curTop, curLeft + curWidth, curTop + curHeight);
+            if (maxHeight < curHeight)
+                maxHeight = curHeight;
+
+            curLeft += curWidth;
+        }
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        final int usableWidth = mDeviceWidth - getPaddingLeft() - getPaddingRight();
+        int width = 0;
+        int rowHeight = 0;
+        int lines = 1;
+
+        final int cnt = getChildCount();
+        for (int i = 0; i < cnt; i++) {
+            final View child = getChildAt(i);
+            measureChild(child, widthMeasureSpec, heightMeasureSpec);
+            width += child.getMeasuredWidth();
+            rowHeight = child.getMeasuredHeight();
+
+            if (width / usableWidth > 0) {
+                lines++;
+                width = child.getMeasuredWidth();
+            }
+        }
+
+        final int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
+        final int calculatedHeight = getPaddingTop() + getPaddingBottom() + (rowHeight * lines);
+        setMeasuredDimension(parentWidth, calculatedHeight);
+    }
+
+    public void setInitialBreadcrumb() {
+        addBreadcrumb("home");
+    }
+
+    public void addBreadcrumb(String text) {
+        final View view = mInflater.inflate(R.layout.breadcrumb_item, null, false);
+        final TextView textView = (TextView) view.findViewById(R.id.breadcrumb_text);
+        textView.setText(text);
+        addView(view);
+    }
+
+    public void removeBreadcrumb() {
+        removeView(getChildAt(getChildCount() - 1));
+    }
+}

app/src/main/java/com/simplemobiletools/filemanager/activities/MainActivity.java

@@ -6,20 +6,24 @@ import android.content.pm.PackageManager;
 import android.os.Bundle;
 import android.os.Environment;
 import android.support.v4.app.ActivityCompat;
-import android.support.v4.app.FragmentManager;
 import android.support.v7.app.AppCompatActivity;
 import android.view.Menu;
 import android.view.MenuItem;
 
+import com.simplemobiletools.filemanager.Breadcrumbs;
 import com.simplemobiletools.filemanager.Config;
 import com.simplemobiletools.filemanager.Constants;
 import com.simplemobiletools.filemanager.R;
 import com.simplemobiletools.filemanager.Utils;
 import com.simplemobiletools.filemanager.fragments.ItemsFragment;
+import com.simplemobiletools.filemanager.models.FileDirItem;
 
+import butterknife.BindView;
 import butterknife.ButterKnife;
 
 public class MainActivity extends AppCompatActivity implements ItemsFragment.ItemInteractionListener {
+    @BindView(R.id.breadcrumbs) Breadcrumbs mBreadcrumbs;
+
     private static final int STORAGE_PERMISSION = 1;
 
     @Override
@@ -47,13 +51,12 @@ public class MainActivity extends AppCompatActivity implements ItemsFragment.Ite
     private void initRootFileManager() {
         final String path = Environment.getExternalStorageDirectory().toString();
         openPath(path);
+        mBreadcrumbs.setInitialBreadcrumb();
     }
 
     private void openPath(String path) {
         final Bundle bundle = new Bundle();
         bundle.putString(Constants.PATH, path);
-        if (getSupportFragmentManager().getBackStackEntryCount() > 0)
-            setTitle(path);
 
         final ItemsFragment fragment = new ItemsFragment();
         fragment.setArguments(bundle);
@@ -81,16 +84,11 @@ public class MainActivity extends AppCompatActivity implements ItemsFragment.Ite
 
     @Override
     public void onBackPressed() {
-        final FragmentManager manager = getSupportFragmentManager();
+        final int cnt = getSupportFragmentManager().getBackStackEntryCount();
-        final int cnt = manager.getBackStackEntryCount();
         if (cnt == 1)
             finish();
         else {
-            if (cnt == 2) {
+            mBreadcrumbs.removeBreadcrumb();
-                setTitle(getResources().getString(R.string.app_name));
-            } else {
-                setTitle(manager.getBackStackEntryAt(cnt - 2).getName());
-            }
             super.onBackPressed();
         }
     }
@@ -110,7 +108,8 @@ public class MainActivity extends AppCompatActivity implements ItemsFragment.Ite
     }
 
     @Override
-    public void itemClicked(String path) {
+    public void itemClicked(FileDirItem item) {
-        openPath(path);
+        openPath(item.getPath());
+        mBreadcrumbs.addBreadcrumb(" -> " + item.getName());
     }
 }

app/src/main/java/com/simplemobiletools/filemanager/fragments/ItemsFragment.java

@@ -163,7 +163,7 @@ public class ItemsFragment extends android.support.v4.app.Fragment
         final FileDirItem item = mItems.get(position);
         if (item.getIsDirectory()) {
             if (mListener != null)
-                mListener.itemClicked(item.getPath());
+                mListener.itemClicked(item);
         } else {
             final String path = item.getPath();
             final File file = new File(path);
@@ -588,6 +588,6 @@ public class ItemsFragment extends android.support.v4.app.Fragment
     }
 
     public interface ItemInteractionListener {
-        void itemClicked(String path);
+        void itemClicked(FileDirItem item);
     }
 }

app/src/main/res/layout/activity_main.xml

@@ -1,6 +1,21 @@
 <?xml version="1.0" encoding="utf-8"?>
-<FrameLayout
+<RelativeLayout
+    android:id="@+id/main_screen"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <com.simplemobiletools.filemanager.Breadcrumbs
+        android:id="@+id/breadcrumbs"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:padding="@dimen/activity_margin"/>
+
+    <FrameLayout
         android:id="@+id/fragment_holder"
         xmlns:android="http://schemas.android.com/apk/res/android"
         android:layout_width="match_parent"
-    android:layout_height="match_parent"/>
+        android:layout_height="match_parent"
+        android:layout_below="@+id/breadcrumbs"/>
+
+</RelativeLayout>

app/src/main/res/layout/breadcrumb_item.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TextView
+    android:id="@+id/breadcrumb_text"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"/>