我有一个LinearLayout对象，想要动态添加图像对象动态更改背景图像（动态更改颜色）。
这是代码：
if (categoryResponse != null && categoryResponse.result != null
&& categoryResponse.result.length > 0) {
int i = 0;
category = new TextView[categoryResponse.result.length];
for (Category cat : categoryResponse.result) {
category[i] = new TextView(getActivity());
LinearLayout.LayoutParams par = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT);
par.setMargins(0, 10, 0, 0);
category[i].setLayoutParams(par);
category[i].setGravity(Gravity.CENTER);
category[i].setText(cat.name);
category[i].setTag(cat.id);
category[i].setPadding(0, 10, 0, 10);
category[i].setTextSize(25);
category[i].setBackgroundResource(R.drawable.category);
category[i].setTypeface(Global.AppsFont);
category[i].setTextColor(getResources().getColor(
R.color.white));
main.addView(category[i]);
//System.out.println("header textview width = " +category[i].getWidth() + "");
category[i].setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String id = (String) v.getTag();
for (Entry<String, LinearLayout> entry : channels
.entrySet()) {
if (entry.getKey().equals(id)) {
entry.getValue().setVisibility(
View.VISIBLE);
} else
entry.getValue().setVisibility(
View.GONE);
}
}
});
i++;
LinearLayout LLM = null;
LLM = new LinearLayout(getActivity());
channels.put(cat.id, LLM);
LLM.setOrientation(LinearLayout.VERTICAL);
LLM.setVisibility(View.GONE);
LinearLayout.LayoutParams LLParamsm = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT);
LLParamsm.setMargins(0, 0, 0, 0);
LLM.setPadding(0, 0, 0, 0);
LLM.setLayoutParams(LLParamsm);
LLM.setBackgroundResource(R.drawable.category_bg);
main.addView(LLM);
LinearLayout LL = null;
int j = 0;
ChannelResponse channelResponse = JsonUtils
.getChannel(cat.id);
channelResponseData.put(cat.id, channelResponse);
if (channelResponse != null
&& channelResponse.result != null
&& channelResponse.result.length > 0) {
for (Channel chan : channelResponse.result) {
if (j % 2 == 0) {
LL = new LinearLayout(getActivity());
LinearLayout.LayoutParams LLParams = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT);
LL.setOrientation(LinearLayout.HORIZONTAL);
LL.setWeightSum(1);
LL.setLayoutParams(LLParams);
LLM.addView(LL);
}
Button chn = new Button(getActivity());
LinearLayout.LayoutParams ladderFLParams = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT, 0.5f);
ladderFLParams.setMargins(10, 10, 10, 10);
chn.setBackgroundResource(R.drawable.gray_selector);
chn.setGravity(Gravity.CENTER);
chn.setLayoutParams(ladderFLParams);
chn.setText(chan.name);
chn.setTag(chan.id);
chn.setTextSize(25);
chn.setTextColor(getResources().getColor(
R.color.black));
chn.setTypeface(Global.AppsFont);
chn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
channelIdid = (String) v.getTag();
createDialogBox(v);
}
});
LL.addView(chn);
channel.add(chn);
j++;
}
if (j % 2 != 0) {
Button chn = new Button(getActivity());
LinearLayout.LayoutParams ladderFLParams = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT, 0.5f);
ladderFLParams.setMargins(10, 10, 10, 10);
chn.setBackgroundResource(R.drawable.gray_selector);
chn.setGravity(Gravity.CENTER_HORIZONTAL
| Gravity.CENTER_VERTICAL);
chn.setLayoutParams(ladderFLParams);
chn.setVisibility(View.INVISIBLE);
chn.setTextSize(25);
chn.setTextColor(getResources().getColor(
R.color.black));
chn.setTypeface(Global.AppsFont);
LL.addView(chn);
channel.add(chn);
}
}
}
}'
答案 0 :(得分：0)
9-patch图像会自动添加内置于9-patch中的填充，作为填充到视图中。因此，当您致电LLM.setPadding(0, 0, 0, 0)时，当您拨打被覆盖的LLM.setBackgroundResource时。
以下是有关9补丁的文档：http://developer.android.com/guide/topics/graphics/2d-graphics.html#nine-patch
如果您不想填充，最好的选择是设计没有填充的9补丁，换句话说，可绘制和可伸展区域都会到达图像的边缘。
我想你也可以尝试在setBackgroundResource之后调用setPadding，但我不确定这是否可行。真的，你应该只考虑所需的填充设计你的背景。
这有意义吗？