Question

我试图找到一种动态创建自定义视图的方法，但我没有为我的问题找到有用的帖子。

我有下一个观点。

View

这是布局的树：

Layouts

我想创建与收到的项目一样多的副本，但我需要更改每个项目内的文本视图。

我不知道如果我解释得很好。谢谢。

编辑：

我遵循你的一些建议，我这样做：

private void addInputHeader(int timestamp)
    {
        LinearLayout mRootLayout = (LinearLayout) findViewById(R.id.event_container);
        View mChildView = getLayoutInflater().inflate(R.layout.program_event_day_header, mRootLayout, false);
        ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        mRootLayout.addView(mChildView, params);

        TextView tv_day = (TextView) mChildView.findViewById(R.id.tv_day);

        tv_day.setText(getDayForHeader(timestamp) + getResources().getString(R.string.of) + getMonthForHeader(timestamp));

    }

    private void addInputDescription(int timestamp, String description)
    {
        LinearLayout mRootLayout = (LinearLayout) findViewById(R.id.event_container);
        View mChildView = getLayoutInflater().inflate(R.layout.program_event_day_header, mRootLayout, false);
        ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        mRootLayout.addView(mChildView, params);

        TextView tv_event_hour = (TextView) mChildView.findViewById(R.id.tv_event_hour);
        TextView tv_event_message = (TextView) mChildView.findViewById(R.id.tv_event_message);

        tv_event_hour.setText(getHour(timestamp) + " - ");
        tv_event_message.setText(description);
    }

    private String getDayForHeader(long timeStamp){
        Date df = new Date(timeStamp*1000);
        return new SimpleDateFormat("cccc dd").format(df);
    }

    private String getMonthForHeader(long timeStamp){
        Date df = new Date(timeStamp*1000);
        return new SimpleDateFormat("MM").format(df);
    }

    private String getHour(long timeStamp){
        Date df = new Date(timeStamp*1000);
        return new SimpleDateFormat("HH:mm").format(df);
    }

    private int getD(long timeStamp){
        Date df = new Date(timeStamp*1000);
        return Integer.parseInt(new SimpleDateFormat("dd").format(df));
    }

    private int getM(long timeStamp){
        Date df = new Date(timeStamp*1000);
        return Integer.parseInt(new SimpleDateFormat("MM").format(df));
    }

    private int getY(long timeStamp){
        Date df = new Date(timeStamp*1000);
        return Integer.parseInt(new SimpleDateFormat("yyyy").format(df));
    }

但是当addInputDescription尝试在tv_event_hour上设置文本时，我收到NullPointerException。

Answer 1

为您的商品创建一个VO并将其添加到布局中。比如，layout.add（item）

Answer 2

如果您尝试将子视图（或多个）添加到根LinearLayout，请参阅以下代码：

    LinearLayout mRootLayout = (LinearLayout) findViewById(R.id.ll_root);
    View mChildView = getLayoutInflater().inflate(R.layout.ll_child, mRootLayout,
            false);
    LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
    mRootLayout.addView(mChildView, params);
    TextView tvEventHour = (TextView) mChildView.findViewById(R.id.tv_event_hour);
    TextView tvEventMessage = (TextView) mChildView.findViewById(R.id.tv_event_message);

    tvEventHour.setText("10:30");
    tvEventMessage.setText("Fugia corum...");

注意：如果列表需要很长时间，您应该考虑使用带有适配器的ListView，因为这样会有更好的性能。

Answer 3

//添加代表ui row.xml的行视图布局

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

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/leftTop"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Left Top" />

    <TextView
        android:id="@+id/RightTop"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Right Top" />
</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/leftBottom"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Left Bottom" />

    <TextView
        android:id="@+id/RightBottom"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Right Bottom" />
</LinearLayout>

</LinearLayout>

//使用msg

添加视图作为行

        private void addMsg() {
                    View msgView = getViewWithMsg("TopLeft", "TopRight", "LeftBottom", "Right Bottom");

                    // msgView represent one row
                    // You can add it to linearlayout desendent to scrollview

                     }

//此方法创建一个msg行布局并更新msg

         private View getViewWithMsg(String TopLeft, String TopRight, String LeftBottom,
        String RightBottom) {
         LayoutInflater inflator = (LayoutInflater)  getSystemService(Context.LAYOUT_INFLATER_SERVICE);

         View root = inflator.inflate(R.layout.row, null);

         TextView topLeft = (TextView) root.findViewById(R.id.leftTop);
         TextView topRight = (TextView) root.findViewById(R.id.RightTop);
         TextView bottomLeft = (TextView) root.findViewById(R.id.leftBottom);
         TextView botomRight = (TextView) root.findViewById(R.id.RightBottom);

         topLeft.setText(TopLeft);
         topRight.setText(TopRight);
         bottomLeft.setText(LeftBottom);
         botomRight.setText(RightBottom);

     return root;

}

Answer 4

你可以从xml充气：

View placeHolderView = inflater.inflate(R.layout.view_header_placeholder, mListView);

你是什么意思＆＃34;更改每个项目内的文本视图。＆＃34;？如果你需要在膨胀的布局中的textview尝试这个：

TextView myTextView = (TextView)placeHolderView.findViewById(R.id.my_text_view);

如何动态创建海关视图？

4 个答案: