不会出现 ScrollView 中的 XYPlot(AndroidPlot 库) [英] XYPlot (AndroidPlot library) in ScrollView does not appear

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本文介绍了不会出现 ScrollView 中的 XYPlot(AndroidPlot 库)的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试放置 XYPlot(来自 AndroidPlot 库 http://androidplot.com/) 在 ScrollView 容器中，因为这个 Activity 中会有更多的东西.不幸的是，我得到的只是空白，图表应该出现在那里(当我删除 ScrollView 时，它会正确显示).

我的布局xml文件:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizo​​ntal_margin"android:paddingRight="@dimen/activity_horizo​​ntal_margin"android:paddingTop="@dimen/activity_vertical_margin"android:paddingBottom="@dimen/activity_vertical_margin" 工具:context=".MainActivity"><滚动视图android:layout_width="match_parent"android:layout_height="wrap_content"android:fillViewport="true"><线性布局android:layout_width="match_parent"android:layout_height="wrap_content"机器人:方向=垂直"><com.androidplot.xy.XYPlotandroid:id="@+id/mySimpleXYPlot"android:layout_width="match_parent"android:layout_height="wrap_content"androidPlot.title="一个简单的 XY 图"androidPlot.domainLabel="域"androidPlot.rangeLabel="范围"androidPlot.titleWidget.labelPaint.textSize="@dimen/title_font_size"androidPlot.domainLabelWidget.labelPaint.textSize="@dimen/domain_label_font_size"androidPlot.rangeLabelWidget.labelPaint.textSize="@dimen/range_label_font_size"androidPlot.graphWidget.marginTop="20dp"androidPlot.graphWidget.marginLeft="15dp"androidPlot.graphWidget.marginBottom="30dp"androidPlot.graphWidget.marginRight="10dp"androidPlot.graphWidget.rangeLabelPaint.textSize="@dimen/range_tick_label_font_size"androidPlot.graphWidget.rangeOriginLabelPaint.textSize="@dimen/range_tick_label_font_size"androidPlot.graphWidget.domainLabelPaint.textSize="@dimen/domain_tick_label_font_size"androidPlot.graphWidget.domainOriginLabelPaint.textSize="@dimen/domain_tick_label_font_size"androidPlot.legendWidget.textPaint.textSize="@dimen/legend_text_font_size"androidPlot.legendWidget.iconSizeMetrics.heightMetric.value="15dp"androidPlot.legendWidget.iconSizeMetrics.widthMetric.value="15dp"androidPlot.legendWidget.heightMetric.value="25dp"androidPlot.legendWidget.positionMetrics.anchor="right_bottom"androidPlot.graphWidget.gridLinePaint.color="#000000"/></LinearLayout></ScrollView>

我的onCreate()方法:

protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);XYPlot plot = (XYPlot) findViewById(R.id.mySimpleXYPlot);Number[] series1Numbers = {1, 8, 5, 2, 7, 4};XYSeries series1 = 新的 SimpleXYSeries(Arrays.asList(series1Numbers), SimpleXYSeries.ArrayFormat.Y_VALS_ONLY, "Series1");LineAndPointFormatter series1Format = new LineAndPointFormatter();series1Format.setPointLabelFormatter(new PointLabelFormatter());series1Format.configure(getApplicationContext(),R.xml.line_point_formatter_with_plf1);plot.addSeries(series1, series1Format);plot.setTicksPerRangeLabel(3);plot.getGraphWidget().setDomainLabelOrientation(-45);}

这是快速入门教程中的一个示例，略有删节.我已经检查了这个答案:Androidplot - X 轴标签被切断

当我将布局更改为:

<线性布局android:layout_width="match_parent"android:layout_height="wrap_content"机器人:方向=垂直"><com.androidplot.xy.XYPlotandroid:id="@+id/mySimpleXYPlot"android:layout_width="match_parent"android:layout_height="match_parent" .../>

并添加几个 TextView 小部件，图表出现，但我无法滚动查看它们.最后，当我添加更多 TextView 小部件(像很多)时，图表不会再次出现，但我可以看到所有 TextView 小部件并滚动查看所有这些小部件.

有人可以帮忙吗?

解决方案

我遇到了类似的问题.痛苦的部分是意识到这个问题实际上结合了两个独立的问题.

1.) 布局定义在为 XYPlot 定义布局时，而不是 android:layout_height="match_parent" 定义您需要的 dp 值(类似于 android:layout_height="200dp")

2.) 硬件加速在检查 logcat 时，我注意到以下输出

<块引用>

W/View:视图太大而无法放入绘图缓存，需要 10368000 字节，只有 8294400 可用

快速搜索使我这个stackoverflow 主题.所以基本上我将 android:hardwareAccelerated="false" 添加到 AndroidManifest.xml 文件中的 Activity.之后它起作用了，但速度慢得要命.我最终将 androidplot.renderMode="use_background_thread" 添加到 XYPlot 布局定义中，这些更改对我有用.

希望这会有所帮助.

I am trying to put XYPlot (from AndroidPlot library http://androidplot.com/) in ScrollView container, because there will be more stuff in this Activity. Unfortunately all I am getting back is blank space, where the chart should appear (when I remove ScrollView it appears properly).

My layout xml file:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

<ScrollView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:fillViewport="true">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
    <com.androidplot.xy.XYPlot
        android:id="@+id/mySimpleXYPlot"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        androidPlot.title="A Simple XY Plot"
        androidPlot.domainLabel="Domain"
        androidPlot.rangeLabel="Range"
        androidPlot.titleWidget.labelPaint.textSize="@dimen/title_font_size"
        androidPlot.domainLabelWidget.labelPaint.textSize="@dimen/domain_label_font_size"
        androidPlot.rangeLabelWidget.labelPaint.textSize="@dimen/range_label_font_size"
        androidPlot.graphWidget.marginTop="20dp"
        androidPlot.graphWidget.marginLeft="15dp"
        androidPlot.graphWidget.marginBottom="30dp"
        androidPlot.graphWidget.marginRight="10dp"
        androidPlot.graphWidget.rangeLabelPaint.textSize="@dimen/range_tick_label_font_size"
        androidPlot.graphWidget.rangeOriginLabelPaint.textSize="@dimen/range_tick_label_font_size"
        androidPlot.graphWidget.domainLabelPaint.textSize="@dimen/domain_tick_label_font_size"
        androidPlot.graphWidget.domainOriginLabelPaint.textSize="@dimen/domain_tick_label_font_size"
        androidPlot.legendWidget.textPaint.textSize="@dimen/legend_text_font_size"
        androidPlot.legendWidget.iconSizeMetrics.heightMetric.value="15dp"
        androidPlot.legendWidget.iconSizeMetrics.widthMetric.value="15dp"
        androidPlot.legendWidget.heightMetric.value="25dp"
        androidPlot.legendWidget.positionMetrics.anchor="right_bottom"
        androidPlot.graphWidget.gridLinePaint.color="#000000"/>
    </LinearLayout>
 </ScrollView>

My onCreate() method:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    XYPlot plot = (XYPlot) findViewById(R.id.mySimpleXYPlot);


    Number[] series1Numbers = {1, 8, 5, 2, 7, 4};

    XYSeries series1 = new SimpleXYSeries(
            Arrays.asList(series1Numbers), SimpleXYSeries.ArrayFormat.Y_VALS_ONLY, "Series1");                             

    LineAndPointFormatter series1Format = new LineAndPointFormatter();
    series1Format.setPointLabelFormatter(new PointLabelFormatter());
    series1Format.configure(getApplicationContext(),
            R.xml.line_point_formatter_with_plf1);

    plot.addSeries(series1, series1Format);

    plot.setTicksPerRangeLabel(3);
    plot.getGraphWidget().setDomainLabelOrientation(-45);

}

It is an example from QuickStart Tutorial, slightly truncated. I have already checked this answer: Androidplot - X-Axis labels cut off

When I change layout to:

<ScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
    <com.androidplot.xy.XYPlot
        android:id="@+id/mySimpleXYPlot"
        android:layout_width="match_parent"
        android:layout_height="match_parent" .../>

and add several TextView widgets, the chart appears, but I can't scroll to see them. Finally, when I add more TextView widgets (like a lot), chart doesn't appear again, but I can see all TextView widgets and scroll to see all of them.

Can anyone help?

解决方案

I had a somewhat similar problem. The painful part was to realise that this issue actually combines 2 separate problems.

1.) Layout definition When defining the layout for the XYPlot, instead of android:layout_height="match_parent" define the dp value you need ( something like android:layout_height="200dp")

2.) Hardware acceleration While checking the logcat, I noticed the following output

W/View﹕ View too large to fit into drawing cache, needs 10368000 bytes, only 8294400 available

A quick search led me to this stackoverflow topic. So basically I added android:hardwareAccelerated="false" to the Activity in the AndroidManifest.xml file. After that it worked, but was slow as hell. I ended up with adding androidplot.renderMode="use_background_thread" to the XYPlot layout definition and these changes did the trick for me.

Hopefully this will help.

这篇关于不会出现 ScrollView 中的 XYPlot(AndroidPlot 库)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！

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