以编程方式在线性布局中移动布局位置 [英] Moving layout position programmatically in linear layout

问题描述

我有以下xml:

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

    <LinearLayout
        android:id="@+id/wrapper"
        android:layout_width="fill_parent"
        android:layout_height="50dp"
        android:layout_margin="10dip"
        android:weightSum="1"
        android:background="#000"
        android:orientation="horizontal">
        <TextView
            android:id="@+id/textMessage"
            android:layout_width="0dp"
            android:layout_height="fill_parent"
            android:layout_weight = ".9"
            android:layout_gravity="center"
            android:layout_margin="5dip"
            android:paddingLeft="10dip"
            android:background="#FFF"
            android:text="TEXT NOT SET"
            android:textColor="@android:color/white" />
        <ImageView
            android:id="@+id/thumbPhoto"
            android:layout_width="0dp"
            android:layout_height="fill_parent"
            android:layout_weight = ".1"
            android:src="@drawable/ic_contact_default"/>
    </LinearLayout>
</LinearLayout>

我想做的是以编程方式将ImageView的位置更改为textMessage的左侧.

What i would like to do is to have the position of my ImageView change to the left side of my textMessage programmatically.

这可以通过将我的ImageView放在TextView上方来通过xml完成​​.但是，我希望通过编程实现相同的结果.

This could be done through xml by placing my ImageView above the TextView. However I would like to achieve the same result but programmatically.

假设我的适配器中有这个

Suppose I have this in my Adapter:

public View getView(int position, View convertView, ViewGroup parent) {

    View row = convertView;
    if (row == null) {
            LayoutInflater inflater = (LayoutInflater) this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            row = inflater.inflate(R.layout.chat_item, parent, false);
    }

    wrapper = (LinearLayout) row.findViewById(R.id.wrapper);

    // How should I change the position of my ImageView ??
    wrapper.setGravity([some_condition] ? Gravity.LEFT : Gravity.RIGHT);

    return row;
}

推荐答案

尝试这样....

ImageView imageView= (ImageView)yourLinearLayout.findViewById(R.id.thumbPhoto);
yourLinearLayout.removeViewAt(1);
yourLinearLayout.addView(0, imageView);

使用此行

// How should i change the position of my ImageView ??
        wrapper.setGravity([some_condition] ? Gravity.LEFT : Gravity.RIGHT);

它没有效果.因为在此处将重力应用于线性布局，所以此重力将其全部内容向左或向右对齐.

It shows no effect. Because here you are applying gravity to linearlayout, this gravity aligns its whole content either in left or right.

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