display amount of storage on /sdcard by downloads, music etc

when music storage usage is clicked on, show music app
when downloads storage usage is clicked on, show download app
when pic/videos storage usage is clicked on, show gallery app

Change-Id: Ia1c341013e550acb537e6f8a4f4558030888cc45

src/com/android/settings/deviceinfo/FileItemInfoLayout.java

@@ -0,0 +1,78 @@
+// Copyright 2011 Google Inc. All Rights Reserved.
+
+package com.android.settings.deviceinfo;
+
+import com.android.settings.R;
+
+import android.content.Context;
+import android.os.Environment;
+import android.util.AttributeSet;
+import android.view.ViewDebug;
+import android.widget.CheckBox;
+import android.widget.Checkable;
+import android.widget.RelativeLayout;
+import android.widget.TextView;
+
+/**
+ * Handles display of a single row entry on Settings --> Storage --> Misc Files screen
+ */
+public class FileItemInfoLayout extends RelativeLayout implements Checkable {
+    private TextView mFileNameView;
+    private TextView mFileSizeView;
+    private CheckBox mCheckbox;
+    private static final int mLengthExternalStorageDirPrefix =
+            Environment.getExternalStorageDirectory().getAbsolutePath().length() + 1;
+
+    public FileItemInfoLayout(Context context) {
+        this(context, null);
+    }
+
+    public FileItemInfoLayout(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public FileItemInfoLayout(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    public void toggle() {
+        setChecked(!mCheckbox.isChecked());
+    }
+
+    /* (non-Javadoc)
+     * @see android.view.View#onFinishInflate()
+     */
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        mFileNameView = (TextView) findViewById(R.id.misc_filename);
+        mFileSizeView = (TextView) findViewById(R.id.misc_filesize);
+        mCheckbox = (CheckBox) findViewById(R.id.misc_checkbox);
+    }
+
+    public void setFileName(String fileName) {
+        mFileNameView.setText(fileName.substring(mLengthExternalStorageDirPrefix));
+    }
+
+    public void setFileSize(String filesize) {
+        mFileSizeView.setText(filesize);
+    }
+
+    @ViewDebug.ExportedProperty
+    public boolean isChecked() {
+        return mCheckbox.isChecked();
+    }
+
+    public CheckBox getCheckBox() {
+        return mCheckbox;
+    }
+
+    /**
+     * <p>Changes the checked state of this text view.</p>
+     *
+     * @param checked true to check the text, false to uncheck it
+     */
+    public void setChecked(boolean checked) {
+        mCheckbox.setChecked(checked);
+    }
+}