将 TextView 宽度设置为 0dp 不起作用
如何以编程方式将 TextView 的宽度设置为 0dp ?我试图放入 LinearLayout 几个 TextView,但宽度都相同,当我放入 xml 时
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_gravity="left"
android:gravity="left"
/>
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_gravity="center_horizontal"
android:gravity="center_horizontal"
/>
<TextView
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:text="test"
android:layout_gravity="right"
android:gravity="right"
/>
</LinearLayout>
,但在代码中尝试时,
TextView txtTemp = new TextView(this);
txtTemp.setText(captures.get(i));
LinearLayout.LayoutParams tempLL = (LinearLayout.LayoutParams) txtTemp
.getLayoutParams();
tempLL.width =0;
tempLL.height = LinearLayout.LayoutParams.WRAP_CONTENT;
tempLL.weight = 1;
if (i == 0) {
tempLL.gravity = Gravity.LEFT;
}
if (i == (captures.size() - 1)) {
tempLL.gravity = Gravity.RIGHT;
} else {
tempLL.gravity = Gravity.CENTER;
}
txtTemp.setLayoutParams(tempLL);
我在 tempLL.width null 异常上遇到了异常。如何解决这个问题?
How to set programmatically width of TextView to be 0dp ? I am trying to put in LinearLayout couple TextViews but all to be same width, and when I put in xml like
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_gravity="left"
android:gravity="left"
/>
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_gravity="center_horizontal"
android:gravity="center_horizontal"
/>
<TextView
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:text="test"
android:layout_gravity="right"
android:gravity="right"
/>
</LinearLayout>
but when in code try like
TextView txtTemp = new TextView(this);
txtTemp.setText(captures.get(i));
LinearLayout.LayoutParams tempLL = (LinearLayout.LayoutParams) txtTemp
.getLayoutParams();
tempLL.width =0;
tempLL.height = LinearLayout.LayoutParams.WRAP_CONTENT;
tempLL.weight = 1;
if (i == 0) {
tempLL.gravity = Gravity.LEFT;
}
if (i == (captures.size() - 1)) {
tempLL.gravity = Gravity.RIGHT;
} else {
tempLL.gravity = Gravity.CENTER;
}
txtTemp.setLayoutParams(tempLL);
I got exception on tempLL.width null exception. How to solve this ?
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而不是使用
尝试这个
您正在创建一个新的文本视图,并且尚未指定布局参数。所以 getLayoutParams 应该返回 null。因此,创建一个新的layoutparam对象并将其设置为新的textview。
Instead of using
try this
You are creating a new textview and there is no layoutparams specified yet. So getLayoutParams should return null. So create a new layoutparam object and set that to the new textview.