PyCoder PyCoder - 2 years ago 90
Android Question

Putting multiple values in DataPoint via for loop (GraphView)

I'm currently developing an application and inside the app, I need to draw some line graph. I researched and found a tool for this but the problem is below:

public class graphActivity extends AppCompatActivity {

GraphView graph;

SharedPrefManager sharedPrefManager = new SharedPrefManager();

int exercisePosition;

protected void onCreate(Bundle savedInstanceState) {
Toolbar toolbar = (Toolbar) findViewById(;

//getting the exercise position from caller activity and proceeding
if(savedInstanceState == null){
Bundle extras = getIntent().getExtras();
if(extras == null){
//do nothing
} else{
exercisePosition = extras.getInt("position");

} else{
exercisePosition = (int) savedInstanceState.getSerializable("position");

graph = (GraphView) findViewById(;

ArrayList<Exercise> exercises= sharedPrefManager.readSharedPref(this);

//getting the exercise from exercises array list so that the specific graph for the exercise can be shown.
Exercise exercise = exercises.get(exercisePosition);

LineGraphSeries<DataPoint> series = new LineGraphSeries<>(new DataPoint[] {
//need to put for loop here but I can't...
//new DataPoint(x,y);


FloatingActionButton fab = (FloatingActionButton) findViewById(;
fab.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();


To be exact, I need to fill that DataPoint variables using for loop since the data will be entered by the user but when I try to implement for loop it get angry and I don't know how to get around it. If anyone dealth with this kind of thing before any help is appreciated.

Answer Source

Do something like this,

DataPoint[] dp = new DataPoint[10];
for(int i=1;i<=10;i++){
    dp[i] = new DataPoint(x, y);

LineGraphSeries<DataPoint> series = new LineGraphSeries<>(dp);
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