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POAndroid need help with diagram
 

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  1. POAndroid need help with diagram
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    <p>i've been doing this code about making a diagram in android, but the error keep coming, am i missing something?</p> <pre><code>package android.research.chart; import java.io.File; import java.io.FileOutputStream; import org.achartengine.ChartFactory; import org.achartengine.GraphicalView; import org.achartengine.chart.PointStyle; import org.achartengine.chartdemo.demo.R; import org.achartengine.model.SeriesSelection; import org.achartengine.model.XYMultipleSeriesDataset; import org.achartengine.model.XYSeries; import org.achartengine.renderer.XYMultipleSeriesRenderer; import org.achartengine.renderer.XYSeriesRenderer; import org.achartengine.tools.PanListener; import org.achartengine.tools.ZoomEvent; import org.achartengine.tools.ZoomListener; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.Bitmap.CompressFormat; import android.graphics.Color; import android.os.Bundle; import android.os.Environment; import android.view.View; import android.view.ViewGroup.LayoutParams; import android.widget.Button; import android.widget.LinearLayout; import android.widget.Toast; public class XYChart extends Activity { public static final String TYPE = "type"; private XYMultipleSeriesDataset mDataset = new XYMultipleSeriesDataset(); private XYMultipleSeriesRenderer mRenderer = new XYMultipleSeriesRenderer(); private XYSeries mCurrentSeries; private XYSeriesRenderer mCurrentRenderer; private String mDateFormat; private GraphicalView mChartView; private int index = 0; @Override protected void onRestoreInstanceState(Bundle savedState) { super.onRestoreInstanceState(savedState); mDataset = (XYMultipleSeriesDataset) savedState.getSerializable("dataset"); mRenderer = (XYMultipleSeriesRenderer) savedState.getSerializable("renderer"); mCurrentSeries = (XYSeries) savedState.getSerializable("current_series"); mCurrentRenderer = (XYSeriesRenderer) savedState.getSerializable("current_renderer"); mDateFormat = savedState.getString("date_format"); } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putSerializable("dataset", mDataset); outState.putSerializable("renderer", mRenderer); outState.putSerializable("current_series", mCurrentSeries); outState.putSerializable("current_renderer", mCurrentRenderer); outState.putString("date_format", mDateFormat); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.xy_chart); mX = (EditText) findViewById(R.id.xValue); mY = (EditText) findViewById(R.id.yValue); mRenderer.setApplyBackgroundColor(true); mRenderer.setBackgroundColor(Color.argb(100, 50, 50, 50)); mRenderer.setAxisTitleTextSize(16); mRenderer.setChartTitleTextSize(20); mRenderer.setLabelsTextSize(15); mRenderer.setLegendTextSize(15); mRenderer.setMargins(new int[] { 20, 30, 15, 0 }); mRenderer.setZoomButtonsVisible(true); mRenderer.setPointSize(10); XYSeries series = new XYSeries("Kenaikan Gula Darah"); mDataset.addSeries(series); mCurrentSeries = series; XYSeriesRenderer renderer = new XYSeriesRenderer(); mRenderer.addSeriesRenderer(renderer); renderer.setPointStyle(PointStyle.CIRCLE); renderer.setFillPoints(true); mCurrentRenderer = renderer; setSeriesEnabled(true); double x = 0; double y = 0; try { x = 1; } catch (NumberFormatException e) { // TODO return; } try { y = 50; } catch (NumberFormatException e) { // TODO return; } mCurrentSeries.add(x, y); if (mChartView != null) { mChartView.repaint(); } Bitmap bitmap = mChartView.toBitmap(); try { File file = new File(Environment.getExternalStorageDirectory(), "test" + index++ + ".png"); FileOutputStream output = new FileOutputStream(file); bitmap.compress(CompressFormat.PNG, 100, output); } catch (Exception e) { e.printStackTrace(); } } @Override protected void onResume() { super.onResume(); if (mChartView == null) { LinearLayout layout = (LinearLayout) findViewById(R.id.chart); mChartView = ChartFactory.getLineChartView(this, mDataset, mRenderer); mRenderer.setClickEnabled(true); mRenderer.setSelectableBuffer(100); mChartView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint(); double[] xy = mChartView.toRealPoint(0); if (seriesSelection == null) { Toast.makeText(XYChartBuilder.this, "No chart element was clicked", Toast.LENGTH_SHORT) .show(); } else { Toast.makeText( XYChartBuilder.this, "Chart element in series index " + seriesSelection.getSeriesIndex() + " data point index " + seriesSelection.getPointIndex() + " was clicked" + " closest point value X=" + seriesSelection.getXValue() + ", Y=" + seriesSelection.getValue() + " clicked point value X=" + (float) xy[0] + ", Y=" + (float) xy[1], Toast.LENGTH_SHORT).show(); } } }); mChartView.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint(); if (seriesSelection == null) { Toast.makeText(XYChartBuilder.this, "No chart element was long pressed", Toast.LENGTH_SHORT); return false; // no chart element was long pressed, so let something // else handle the event } else { Toast.makeText(XYChartBuilder.this, "Chart element in series index " + seriesSelection.getSeriesIndex() + " data point index " + seriesSelection.getPointIndex() + " was long pressed", Toast.LENGTH_SHORT); return true; // the element was long pressed - the event has been // handled } } }); mChartView.addZoomListener(new ZoomListener() { public void zoomApplied(ZoomEvent e) { String type = "out"; if (e.isZoomIn()) { type = "in"; } System.out.println("Zoom " + type + " rate " + e.getZoomRate()); } public void zoomReset() { System.out.println("Reset"); } }, true, true); mChartView.addPanListener(new PanListener() { public void panApplied() { System.out.println("New X range=[" + mRenderer.getXAxisMin() + ", " + mRenderer.getXAxisMax() + "], Y range=[" + mRenderer.getYAxisMax() + ", " + mRenderer.getYAxisMax() + "]"); } }); layout.addView(mChartView, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); boolean enabled = mDataset.getSeriesCount() &gt; 0; setSeriesEnabled(enabled); } else { mChartView.repaint(); } } private void setSeriesEnabled(boolean enabled) { mX.setEnabled(enabled); mY.setEnabled(enabled); mAdd.setEnabled(enabled); } } </code></pre> <p>i wanted to put a value to x and y manually, and i guess i need an array for it cause i get that value from my database sqlite which has many x and y value inside.</p> <p>anyone can help me to solved this problem? thanks before</p> <p>edit : i've got error in :</p> <pre><code> double x = 0; double y = 0; try { x = 1; } catch (NumberFormatException e) { // TODO return; } try { y = 50; } catch (NumberFormatException e) { // TODO return; } mCurrentSeries.add(x, y); if (mChartView != null) { mChartView.repaint(); } Bitmap bitmap = mChartView.toBitmap(); try { File file = new File(Environment.getExternalStorageDirectory(), "test" + index++ + ".png"); FileOutputStream output = new FileOutputStream(file); bitmap.compress(CompressFormat.PNG, 100, output); } catch (Exception e) { e.printStackTrace(); } </code></pre> <p>but when i put x and y value by editText, it work, i don't know why, here's the code with editText :</p> <pre><code>mAdd.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { double x = 0; double y = 0; try { x = Double.parseDouble(mX.getText().toString()); } catch (NumberFormatException e) { // TODO mX.requestFocus(); return; } try { y = Double.parseDouble(mY.getText().toString()); } catch (NumberFormatException e) { // TODO mY.requestFocus(); return; } mCurrentSeries.add(x, y); mX.setText(""); mY.setText(""); mX.requestFocus(); if (mChartView != null) { mChartView.repaint(); } Bitmap bitmap = mChartView.toBitmap(); try { File file = new File(Environment.getExternalStorageDirectory(), "test" + index++ + ".png"); FileOutputStream output = new FileOutputStream(file); bitmap.compress(CompressFormat.PNG, 100, output); } catch (Exception e) { e.printStackTrace(); } } }); </code></pre> <p>the problem is i don't wanna put x and y value with editText, but i want to put x and y value from database sqlite. anyone can help me? thanks before</p> <p>log : </p> <pre><code>08-25 16:42:33.975: WARN/dalvikvm(8681): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): FATAL EXCEPTION: main 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.achartengine.chartdemo.demo/org.achartengine.chartdemo.demo.XYChartBuilder}: java.lang.NullPointerException 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at android.os.Handler.dispatchMessage(Handler.java:99) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at android.os.Looper.loop(Looper.java:123) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at android.app.ActivityThread.main(ActivityThread.java:4627) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at java.lang.reflect.Method.invokeNative(Native Method) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at java.lang.reflect.Method.invoke(Method.java:521) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at dalvik.system.NativeStart.main(Native Method) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): Caused by: java.lang.NullPointerException 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at org.achartengine.chartdemo.demo.XYChartBuilder.onCreate(XYChartBuilder.java:137) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 08-25 16:42:33.994: ERROR/AndroidRuntime(8681): ... 11 more </code></pre>
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    1. COplease specify what error you get and which line it's on.
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      1. USMartin Foot
    2. COthe question has been edited :D
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    3. COthere's too much code. nobody will read through all that stuff :(
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      1. USJonathan Roth
 

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