android - 找不到类GraphViewSeries

我正在尝试使用GraphView库在我的应用程序上显示图表。代码非常简单：

package pizio.prova.it;

import android.app.Activity;
import android.os.Bundle;
import android.widget.LinearLayout;

import com.jjoe64.graphview.GraphView;
import com.jjoe64.graphview.GraphView.GraphViewData;
import com.jjoe64.graphview.GraphView.GraphViewSeries;
import com.jjoe64.graphview.LineGraphView;

public class ProvaGraphViewActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);


        // init example series data
        GraphViewSeries exampleSeries = new GraphViewSeries(new GraphViewData[] {
              new GraphViewData(1, 2.0d)
              , new GraphViewData(2, 1.5d)
              , new GraphViewData(3, 2.5d)
              , new GraphViewData(4, 1.0d)
        });


        GraphView graphView = new LineGraphView(
              this // context
              , "GraphViewDemo" // heading
        );
        graphView.addSeries(exampleSeries); // data

        LinearLayout layout = (LinearLayout) findViewById(R.id.graphLayout);
        layout.addView(graphView);

    }
}

此错误：

E/dalvikvm(1224): Could not find class 'com.jjoe64.graphview.GraphView            $GraphViewSeries', referenced from method pizio.prova.it.ProvaGraphViewActivity.onCreate

然后这个致命的异常：

java.lang.NoClassDefFoundError: com.jjoe64.graphview.GraphView$GraphViewSeries
E/AndroidRuntime(1224):     at pizio.prova.it.ProvaGraphViewActivity.onCreate(ProvaGraphViewActivity.java:22)

就是我得到的。为什么它不能到达我已经导入的类？

最佳答案

也许您可以尝试转到porject>properties>import and export。检查graphview jar文件并将其上移。完成此操作后，单击“确定”并清除项目，然后运行。

关于android - 找不到类GraphViewSeries，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/9270041/