Create README.md

Author: Velli20

README.md

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+# MaterialUnixGraphLibrary
+Graphview for Android that plots points automatically based on Unix time input.
+
+Features:
+- Support for user touch input and dialogs
+- Automatic y- and x-axis lebel generation
+- Draw multiple lines simultioinesly
+
+![Screenshots](https://user-images.githubusercontent.com/25138671/27264059-4dfae056-547f-11e7-9b32-644e6c5cd613.jpg)
+
+
+## Usage
+
+### Adding depency to your project
+
+Add ```com.github.Velli20:MaterialUnixGraphLibrary``` to your dependencies in build.gradle
+
+```gradle
+repositories {
+    jcenter()
+    maven { url "https://jitpack.io" }
+}
+    
+dependencies {
+    compile 'com.github.Velli20:MaterialUnixGraphLibrary:v1.5'
+}
+```
+
+Add LineGraph to your layout
+
+```xml
+<com.velli20.materialunixgraph.LineGraph
+        android:id="@+id/graph"
+        android:layout_width="match_parent"
+        android:layout_height="200dp"/>
+```
+
+### Drawing line
+
+You can find full sample code under /sample/ directrory.
+Basic line drawing:
+
+```java
+static final int GRAPH_MAX_VERTICAL_VALUE = 120;
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        LineGraph graph = (LineGraph) findViewById(R.id.graph);
+
+        long unixTimeNow = System.currentTimeMillis();
+        long oneDayInMillis = 1000 * 60 * 60 * 24;
+        boolean showLinePoints = true;
+        
+        Line line = getDummyLine(unixTimeNow, unixTimeNow+oneDayInMillis, showLinePoints);
+        line.setLineColor(Color.parseColor("#00b0ff"));
+        line.setFillLine(true);
+        line.setFillAlpha(60); /* Set alpha of the fill color 0-255 */
+        line.setLineStrokeWidth(2f); 
+        
+        graph.setMaxVerticalAxisValue(GRAPH_MAX_VERTICAL_VALUE);
+        graph.addLine(line);
+     }
+        
+     public Line getDummyLine(long startDateInMillis, long endDateInMillis, boolean showPoints) {
+        Line line = new Line();
+
+        /* Create y-axis points for the line */
+        LinePoint point;
+        for (int i = 0; i < 10; i++) {
+            long x = startDateInMillis + (((endDateInMillis - startDateInMillis) / 10) * i);
+
+            point = new LinePoint(x, mRandom.nextInt(GRAPH_MAX_VERTICAL_VALUE));
+            point.setDrawPoint(showPoints);
+
+            line.addPoint(point);
+        }
+
+        return line;
+    }
+```
+
+### Callbacks
+
+To know when the user taps the graph point or line you set
+
+```java
+
+final LineGraph graph = (LineGraph) findViewById(R.id.graph);
+graph.setOnLinePointTouchListener(new OnLinePointTouchListener() {
+            @Override
+            public void onLinePointClicked(Line line, LinePoint point) {
+                /* User has clicked a point on the graph. Create a dialog to show above the touched point */
+
+                LinePointDialog dialog = new LinePointDialog(point.getX(), point.getY());
+                dialog.setTitle("Pseudo-Random value");
+                dialog.setTitleColor(Color.parseColor("#00b0ff"));
+                dialog.setContentText(String.format(Locale.getDefault(), "%s\n%.2f €", getTimeLabel(point.getX()), point.getY()));
+                dialog.setContentColor(Color.parseColor("#9e9e9e"));
+                graph.drawDialog(dialog);
+            }
+        });
+```
+
+To disable the touch input
+
+```java
+graph.setDrawUserTouchPointEnabled(boolean enabled);