android-graphview

问题 I want to a add tap listener on a data point in the graph view in Android Studio . There is a problem in my java code that says: can't resolve method get Activity() in last line of codes. Help me resolve my problem. Here is my code: package com.example.graph; import android.content.Context; import android.graphics.Color; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.Toast; import android.app.Activity; import com.jjoe64.graphview.GraphView;

问题 I want to plot a Time vs value graph where time (in hours) is on the x-axis and the Values should be on the y-axis. Is there any library to do this? I tried using achartengine http://wptrafficanalyzer.in/blog/android-drawing-time-chart-with-timeseries-in-achartengine/ but not much helpful. 回答1: you can use GraphView for doing this. http://www.jjoe64.com/p/graphview-library.html https://github.com/jjoe64/GraphView you have to use a Custom label formatter . There's an example where the X-values

问题 I'm using GraphView library (see: https://github.com/jjoe64/GraphView or http://www.jjoe64.com/p/graphview-library.html) But I would like to use Date/Time for the X-as. Does anyone knows a easy way to accomplish this or can anyone push me in the right direction? 回答1: GraphView is a great library to use, i find it the easiest as well. The first step in doing this would be to add a String Variable in the GraphViewData Class within GraphView.java. Like So: static public class GraphViewData {

问题 Im using Graphview and work fine, but now i have a problem. I would like to have a background for each series that is added to the graph, and not for all series Is this possible? 回答1: This is currently (5 August 2014) not possible on the original GraphView library. I needed this functionality, so I forked the library and implemented the functionality myself. You can find the updated code on the feature/series_specific_styles branch of my fork: https://github.com/mobiRic/GraphView/tree/feature

问题 I want to reduce the scale of my GraphView to one. I want to be displayed from 0 -> 15, one by one and not 0, 5, 10, 15. This is what I have tried: graphView.getViewport().setYAxisBoundsManual(true); graphView.getViewport().setMinX(-15); graphView.getViewport().setMaxX(15); graphView.getViewport().setXAxisBoundsManual(true); graphView.getViewport().setMinY(-15); graphView.getViewport().setMaxY(15); PointsGraphSeries<DataPoint> series = new PointsGraphSeries<>(new DataPoint[] { //Add DataPoint

问题 I've created a real-time graph, where the values of the x-axis are set to show the time at which the corresponding y-axis values were generated. The graph is constantly updated. The value send to the graph is time in milliseconds. I've created a function which produces the time string in different ways, depending on the time. Here's the code: GraphView heartRateGraph = new LineGraphView(this, "Heart-rate") { @Override protected String formatLabel(double value, boolean isValueX) { if (isValueX

问题 I have created a line graph using GraphView demo.But I need to fill the areas only between the lines with a specific colour. This is what I want to achieve: Error band for a linegraphseries. or Fill colour between two series in a LineGraphSeries of Graphview. Can anybody help? 来源： https://stackoverflow.com/questions/40858555/fill-color-between-two-series-in-a-linegraphseries-of-graphview-android

问题 I'm trying to take snapshot of the GraphView but it gives an error "GraphView must be used in hardware accelerated mode." I'm using the following code to take snapshot Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(bitmap); view.draw(canvas); Also, i've already set android:hardwareAccelerated="true" at application level. 回答1: i used this: dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) testCompile

问题 someone can help me? I found this error and I can't find the resolution to my problem. This is the Android Error: 09-15 18:26:47.434 3096-3096/com.example.user.navigationdrawer E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.user.navigationdrawer, PID: 3096 java.lang.IllegalArgumentException: new x-value must be greater then the last value. x-values has to be ordered in ASC. at com.jjoe64.graphview.series.BaseSeries.appendData(BaseSeries.java:388) at com.example.user

问题 My initial question was: Android GraphView project get freeze with real time updates. In this one I was asking about possible concurrency in UI thread of 3 plots. On memory allocation plot it looks like this: I was receiving data directly from my ProcessThread in main activity and pass it using onEventMainThread from EventBus library back to the GraphFragment . All the data that is passed comes from ProcessThread which gathers data from Bluetooth listening service and then proceeds it to get