scatter plot with dates at x axis — add custom labels on X axis

Question

I want to have a scatter plot with dates in x-axis.

Because if I use ChartFactory.getTimeChartView I receive a line graph and the problem is:

Answer 1

As told by Dan in his answer you can use renderer.addXTextLabel(x, "text"); to set x-axis labels.

In your case:: u made mistake at commented line , You where trying to add x-axis labels twice..

change it as shown below

  TimeSeries series = new TimeSeries("Showing data");
    for (int i=0;i

UPDATE: Change Your code to following it wont crash on adding new data's

and if u want only points to be visible not linealong with point then change this ChartFactory.getLineChartIntent(getBaseContext(), dataset, mRenderer,"dd/MM/yyyy"); to ChartFactory.getScatterChartIntent(getBaseContext(), dataset, mRenderer,"dd/MM/yyyy");

MainActivity.java

package com.example.trying;
import java.io.BufferedWriter;
import java.io.File; // imports add all as before too

public class MainActivity extends Activity implements OnClickListener{


View savebtn;
View graphicsbtn;
EditText value,weight;
String filename = "mydata.csv";    
public static List dates_Strings = new ArrayList();
public static List data = new ArrayList();
public static List date = new ArrayList();

List mydata=new ArrayList();


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

     date.clear();
     data.clear();
     dates_Strings.clear();
     //Set up click listeners
    savebtn=(View) findViewById(R.id.savebtn);
    savebtn.setOnClickListener(this);
    graphicsbtn=(View) findViewById(R.id.graphicsbtn);
    graphicsbtn.setOnClickListener(this);

    value=(EditText) findViewById(R.id.enter_data);


}


//called when a button is clicked
public void onClick(View v) {
    switch (v.getId()){
    case R.id.savebtn:
        savefunc();      
        break;
    case R.id.graphicsbtn:        
        Intent i = new Intent(this,LineGraph.class);        
        startActivity(i);
        break;

}
}

public void savefunc(){

    SimpleDateFormat thedate = new SimpleDateFormat("dd/MM/yyyy"); 
    Date d=new Date();

    String formattedDate=thedate.format(d);
    Log.d("tag","format"+formattedDate);
    dates_Strings.add(formattedDate);




    try{
        double thedata=Double.parseDouble(value.getText().toString().trim());
        mydata.add(thedata);
        Log.d("tag","thedata :"+thedata);
    } catch (NumberFormatException e){
        String message="Sorry you did't type anything";

         Toast toast = Toast.makeText(getBaseContext(), message,Toast.LENGTH_SHORT);  
         toast.setGravity(Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM, 0, 100);
         toast.show();
  // Toast.makeText(getBaseContext(), "Sorry you did't type anything",    Toast.LENGTH_SHORT).show();

    }


    File sdCard = Environment.getExternalStorageDirectory();
    File directory = new File (sdCard, "MyFiles");
    directory.mkdirs();            
    File file = new File(directory, filename);

    FileOutputStream fos;

    //saving them
    try {
       fos = new FileOutputStream(file);

          BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(fos));
          for (int i=0;i

LineGraph.java

package com.example.trying;

import java.io.BufferedReader;
import java.io.File; // add all other imports

public class LineGraph extends MainActivity {

String filename = "mydata.csv";    



private LinearLayout layout;
private GraphicalView mChartView;

protected void onCreate(Bundle savedInstanceState){

     super.onCreate(savedInstanceState);
     setContentView(R.layout.graph);
     layout = (LinearLayout) findViewById(R.id.chart);

    readfunc();       

    //trying to copy the dates_asString to date (Dates) in order to use them in TimeSeries
    SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");
    Date convertedDate;//=new Date();
    try{
   for (int k=0;k