Question

我目前正在尝试在我的阵列适配器的左侧绘制一个项目，但出于某种原因，它似乎只在消失之前出现了几帧。

这里是...的代码

ArrowView

public class ArrowView extends View {
    private Path path;
    private Paint paint;

    private void init() {
        path = new Path();
        paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        paint.setColor(ContextCompat.getColor(getContext(), R.color.white));
        paint.setStyle(Paint.Style.FILL);
    }

    public ArrowView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        path.setFillType(Path.FillType.EVEN_ODD);
        path.moveTo(0, 0);
        path.lineTo(0, getHeight());
        path.lineTo(getWidth(), getHeight() / 2);
        path.lineTo(0, 0);
        path.close();
        canvas.drawPath(path, paint);
        Log.d("arroview", "onDraw called");
    }

    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, widthMeasureSpec);
    }
}

我的片段：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    ViewGroup rootView = (ViewGroup) inflater
            .inflate(R.layout.fragment_first_use_get_started, container, false);

    Button button = (Button) rootView.findViewById(R.id.leave_first_time_screen_button);

    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            getActivity().finish();
        }
    });

    ListView listView = (ListView) rootView.findViewById(R.id.get_started_list_view);
    listView.setAdapter(new ArrayAdapter<>(getContext(), R.layout.adapter_get_started, R.id.get_start_description_text_view, functionalityStrings));
    listView.setDividerHeight(0);
    listView.setEnabled(false);

    return rootView;
}

最后，我的适配器布局：

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:layout_height="match_parent"
    android:orientation="horizontal">

    <com.example.ArrowView
        android:layout_width="0dp"
        android:layout_weight=".25"
        android:layout_height="match_parent" />

    <TextView
        android:id="@+id/get_start_description_text_view"
        android:layout_weight=".75"
        android:layout_width="0dp"
        android:layout_height="wrap_content" />
</LinearLayout>

onDraw只被调用一次，在我的测试中，有几次以某种方式呈现三角形（无法再现......）。我怀疑它必须与ArrayAdapter如何工作有关？

谢谢！

Answer 1

尝试添加

Map<String, Object> params = new HashMap<>();
params.put(JRParameter.REPORT_LOCALE, Locale.CHINA);
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params, new JREmptyDataSource());

构造函数中的

在ArrayAdapter中绘制自定义视图

1 个答案: