aChartEngine，GraphicalView OnClickListener不工作 [英] aChartEngine, GraphicalView OnClickListener not working

问题描述

我是新来的Andr​​oid和现在用aChartEngine创建条形图。我想，当用户点击在图表上捕捉到x和y值。我已经看过了，从aChartEngine演示，并有我的图表打造精品。然而，onClickListner不，当我点击造影工作。我已经定义在OnResume方法听者，但它不工作。任何想法将大大AP preciated。我失去了一些东西呢？

下面是我这是从XYChartBuilder OnResume方法

  @覆盖
保护无效onResume（）{
  super.onResume（）;
Toast.makeText（Clickable2.this，以OnResume，Toast.LENGTH_SHORT）.show（）;

  如果（mChartView == NULL）{

Toast.makeText（Clickable2.this，mChartView为空，Toast.LENGTH_SHORT）.show（）;

    的LinearLayout布局=（的LinearLayout）findViewById（R.id.chart）;
    mChartView = ChartFactory.getBarChartView（这一点，mDatasetMethod（标题，X值），渲染器，Type.DEFAULT）;
    renderer.setClickEnabled（真正的）;
    renderer.setSelectableBuffer（100）;

    // OnClickListener
    mChartView.setOnClickListener（新View.OnClickListener（）{
     // @覆盖
      公共无效的onClick（视图v）{
 Toast.makeText（Clickable2.this，点击，Toast.LENGTH_SHORT）.show（）;
        SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint（）;
        双[] XY = mChartView.toRealPoint（0）;
        如果（seriesSelection == NULL）{
          Toast.makeText（Clickable2.this，没有图表元素被点击了，Toast.LENGTH_SHORT）
              。显示（）;
        } 其他 {
          Toast.makeText（
                  Clickable2.this，
              在系列指数图表元素+ seriesSelection.getSeriesIndex（）
                  +数据点指数+ seriesSelection.getPointIndex（）+被点击
                  +最近点值X =+ seriesSelection.getXValue（）+，Y =+ seriesSelection.getValue（）
                  +单击的点值X =+（浮点）XY [0] +，Y =+（浮点）XY [1]，Toast.LENGTH_SHORT）.show（）;
        }
      }
    }）;

    // LongClickListener
    mChartView.setOnLongClickListener（新View.OnLongClickListener（）{
    // @覆盖
      公共布尔onLongClick（视图v）{
        SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint（）;
  Toast.makeText（Clickable2.this，长按，Toast.LENGTH_SHORT）.show（）;
        如果（seriesSelection == NULL）{
          Toast.makeText（Clickable2.this，没有图表元素是pssed长$ P $，
              Toast.LENGTH_SHORT）;
          返回false; //没有图表元素是pssed长$ P $，所以让一些
          //否则处理该事件
        } 其他 {
          Toast.makeText（Clickable2.this，在系列指数图表元素
              + seriesSelection.getSeriesIndex（）+数据点指数
              + seriesSelection.getPointIndex（）+号长pressed，Toast.LENGTH_SHORT）;
          返回true; //元素是很久pressed  - 事件已
          //处理
        }
      }
    }）;

    mChartView.addZoomListener（新ZoomListener（）{
      公共无效zoomApplied（ZoomEvent E）{
        字符串类型=出;
        如果（e.isZoomIn（））{
          TYPE =中;
        }
        的System.out.println（缩放+类型+速度+ e.getZoomRate（））;
      }

      公共无效zoomReset（）{
        的System.out.println（复位）;
      }
    }，真正的，真实的）;

    mChartView.addPanListener（新PanListener（）{
      公共无效panApplied（）{
        的System.out.println（新的X系列=+ renderer.getXAxisMin（）+，+ renderer.getXAxisMax（）
            +]，Y范围= [+ renderer.getYAxisMax（）+，+ renderer.getYAxisMax（）+]）;
      }
    }）;

    layout.addView（mChartView，新的LayoutParams（LayoutParams.FILL_PARENT，LayoutParams.FILL_PARENT））;
    布尔启用= mDataset.getSeriesCount（）＆GT; 0;
  } 其他 {
    mChartView.repaint（）;
 Toast.makeText（Clickable2.this，mChartView不为空，Toast.LENGTH_SHORT）.show（）;
  }
}
 

解决方案

您可以检查你的code像XYMultipleSeriesRenderer对象的一些定义？ 也许你忘了设置<一个href="http://www.achartengine.org/content/javadoc/org/achartengine/renderer/DefaultRenderer.html#setClickEnabled%28boolean%29">setClickEnabled方法真的吗？！

或者，也许你应该尝试：

  setOnTouchListener
 

使用方法：

 公共布尔onTouch（视图V，MotionEvent事件）
 

这对我的作品。

I'm new to android and am using aChartEngine to create a bar chart. I want to capture the x and y values when a user clicks on the chart. I have looked at the demos from aChartEngine and have my chart creating fine. However the onClickListner does not work when I click on the graphy. I have defined the listener in the OnResume method but it doesn't work. Any ideas would be greatly appreciated. Am I missing something here?

Here is my OnResume method which is taken from XYChartBuilder

@Override
protected void onResume() {
  super.onResume();
Toast.makeText(Clickable2.this, "In OnResume", Toast.LENGTH_SHORT).show();

  if (mChartView == null) {     

Toast.makeText(Clickable2.this, "mChartView is null", Toast.LENGTH_SHORT).show();      

    LinearLayout layout = (LinearLayout) findViewById(R.id.chart);
    mChartView = ChartFactory.getBarChartView(this,mDatasetMethod(titles,x,values),renderer,Type.DEFAULT);
    renderer.setClickEnabled(true);
    renderer.setSelectableBuffer(100);

    //OnClickListener
    mChartView.setOnClickListener(new View.OnClickListener() {
     // @Override
      public void onClick(View v) {
 Toast.makeText(Clickable2.this, "ON CLICK", Toast.LENGTH_SHORT).show();              
        SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint();
        double[] xy = mChartView.toRealPoint(0);
        if (seriesSelection == null) {
          Toast.makeText(Clickable2.this, "No chart element was clicked", Toast.LENGTH_SHORT)
              .show();
        } else {
          Toast.makeText(
                  Clickable2.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();
        }
      }
    });

    //LongClickListener
    mChartView.setOnLongClickListener(new View.OnLongClickListener() {
    //  @Override
      public boolean onLongClick(View v) {
        SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint();
  Toast.makeText(Clickable2.this, "ON LONG CLICK", Toast.LENGTH_SHORT).show();   
        if (seriesSelection == null) {
          Toast.makeText(Clickable2.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(Clickable2.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=[" + renderer.getXAxisMin() + ", " + renderer.getXAxisMax()
            + "], Y range=[" + renderer.getYAxisMax() + ", " + renderer.getYAxisMax() + "]");
      }
    });

    layout.addView(mChartView, new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));
    boolean enabled = mDataset.getSeriesCount() > 0;
  } else {
    mChartView.repaint();
 Toast.makeText(Clickable2.this, "mChartView is NOT null", Toast.LENGTH_SHORT).show();  
  }
} 

解决方案

Can you check your code for some definition of an object like XYMultipleSeriesRenderer? Maybe you forgot to set the setClickEnabled method to true?!

Or maybe you should try:

setOnTouchListener 

with the method:

public boolean onTouch(View v, MotionEvent event)

It works for me.

这篇关于aChartEngine，GraphicalView OnClickListener不工作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！