当我在MainActivity.java中放置以下代码(同时在findViewById前面删除GraphDialog时)时,它可以正常工作。
但是,当我将其放置在对话框“ GraphDialog”中时,logcat错误指向此行(请参见注释行) 如果有人可以帮助我,我会非常感激!谢谢!
//Graph View function
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public void ShowGraphview(View v) {
GraphView graphResult = GraphDialog.findViewById(R.id.graph);
GraphDialog.setContentView(R.layout.ivb_popup_graphview);
btn_close = GraphDialog.findViewById(R.id.dia_btn_close);
GraphDialog.setCanceledOnTouchOutside(true);
//Apply Graph view
LineGraphSeries<DataPoint> series = new LineGraphSeries<>(new DataPoint[]{
new DataPoint(0, 6),
new DataPoint(1, 5),
new DataPoint(2, 3),
new DataPoint(3, 2),
new DataPoint(4, 6)
});
//------------This line is where the logcat error pointed to-------
graphResult.addSeries(series);
//------------logcat error pointed to------------------------------
/*Close Button */
btn_close.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
GraphDialog.dismiss();
}
});
GraphDialog.show();
}
答案 0 :(得分:0)
当我交换这两行时有效。...
GraphView graphResult = GraphDialog.findViewById(R.id.graph);
GraphDialog.setContentView(R.layout.ivb_popup_graphview);