如何在单一活动中显示多个标题和点

Question

我正在关注this SO解决方案，并且我已成功parsed JSON，但我不知道如何在TextViews中显示headings和points。

这是JSON看起来的样子：

{
    "technology": [
        {
            "title": "Android",
            "description": [
                {
                    "heading": "Manufactures",
                    "points": [
                        "Google",
                        "Samsung"
                    ]
                },
                {
                    "heading": "Platforms",
                    "points": [
                        "Kitkat",
                        "ICS"
                    ]
                }
            ]
        }
    ] 
}

举个例子，如果我tap on Android，那么我want to show就像这样：

Manufactures
[dot] Google
[dot] Samsung

Platforms
[dot] Kitkat
[dot] ICS

对于reference，请参阅此图片：

代替Why We Like It，我想显示Manufactures并代替Need to Know，我想显示Platforms（及其各自的点数），如图所示

但getting类似于this：

Platforms
[dot] ICS

对于reference，请参阅此图片：

那是什么原因？我必须在我的代码中进行更改？

DescriptionActivity.java： -

 for(int s=0; s<arrayListDescription.size(); s++)
    {
        description = arrayListDescription.get(s);
        strHeading = "&nbsp;" + description.getHeading();
        Log.d("heading::", strHeading);
        arrayListPoints = description.getPoints();      

        for(int z=0; z<arrayListPoints.size(); z++)
        {
            String dot = getString(R.string.dot);
            strPoints = "";
            strPoints += "&nbsp;&nbsp;" + dot + "&nbsp;" + arrayListPoints.get(z) + "\n";
            Log.d("points::", strPoints);
        }
        textViewPoints.setText(Html.fromHtml(strPoints));
    }       

    textViewHeading.setText(Html.fromHtml(strHeading));
    textViewHeading.setTextSize(20);

}

activity_description.xml： -

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textHeading"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />

    <TextView
        android:id="@+id/textPoints"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />

</LinearLayout>

这是我的Log所说的：

08-28 04:47:39.653: D/heading::(1902): Manufactures
08-28 04:47:39.653: D/points::(1902):  ·Google
08-28 04:47:39.671: D/points::(1902):  ·Samsung
08-28 04:47:39.761: D/heading::(1902): Platforms
08-28 04:47:39.761: D/points::(1902):  ·Kitkat
08-28 04:47:39.761: D/points::(1902):  ·ICS

通过using @ Dreagen 解决方案，getting类似this：

Platforms
null[dot]Google[dot]Samsung[dot]Kitkat[dot]ICS

对于reference，请参阅此image：

我使用了这段代码：

for(int z=0; z<arrayListPoints.size(); z++)
{
    String dot = getString(R.string.dot);
    // strPoints += dot + arrayListPoints.get(z) + "\n";
    strPoints += "&emsp;&middot;" + arrayListPoints.get(z) + System.getProperty("line.separator");
    Log.d("points::", strPoints);
}

Answer 1

我认为你的问题在这里

for(int z=0; z<arrayListPoints.size(); z++)
{
    strPoints = "&emsp;&middot;" + arrayListPoints.get(z) + "\n";        
    Log.d("points::", strPoints);
}

每次循环时，你只是覆盖strPoints，这意味着最后你只有最后一点。日志显示两者，因为每次循环时都会输出到日志。

将其更改为：

for(int z=0; z<arrayListPoints.size(); z++)
{
    strPoints += "&emsp;&middot;" + arrayListPoints.get(z) + System.getProperty("line.separator");
    Log.d("points::", strPoints);
}

请注意+=而不只是=以及使用\n System.getProperty("line.separator");的更改 希望这有帮助

Answer 2

<强>活动

public class MainActivity extends ActionBarActivity {

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

            ArrayList<Model> mydata = new ArrayList<Model>();
            // set 1
            Model model = new Model();
            ArrayList<String> points = new ArrayList<String>();
            model.setHeading("Manufactures");
            points.add("Google");
            points.add("Samsung");
            model.setPoints(points);
            mydata.add(model);

            // set 2

            model = new Model();
            points = new ArrayList<String>();
            model.setHeading("Platforms");
            points.add("Kitkat");
            points.add("ICS");
            model.setPoints(points);
            mydata.add(model);

            // String str =
            // "<h4>An Unordered List:</h4><br/>&#8226; foo<br/>&#8226; bar<br/>&#8226; baz<br/>";

            TextView textview = (TextView) findViewById(R.id.myText);
            String result = "";
            for (int i = 0; i < mydata.size(); i++) {
                result += "<h4>" + mydata.get(i).getHeading() + "</h4>";
                ArrayList<String> appendPoints = new ArrayList<String>(mydata
                        .get(i).getPoints());
                for (int j = 0; j < appendPoints.size(); j++){
                    result += "&#8226; " + appendPoints.get(j) + "<br/>";}

            }

            Spanned spannedResult = Html.fromHtml(result);

            textview.setText(spannedResult);

        }

    }

<强>模型

public class Model {

    private String heading;
    private ArrayList<String> points;

    public String getHeading() {
        return heading;
    }

    public void setHeading(String heading) {
        this.heading = heading;
    }

    public ArrayList<String> getPoints() {
        return points;
    }

    public void setPoints(ArrayList<String> points) {
        this.points = points;
    }

}

XML：

<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.nestedtext.MainActivity" >

    <TextView
        android:id="@+id/myText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

</RelativeLayout>

COMPLETE SOURCE CODE

Answer 3

除了Dreagen的回答，您还应该将新的线路符号更改为br标签。 其他解决方案是使用pre预格式文本，但我不确定Android是否支持该标记。