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POWhen a view's layout_width is wrap_content, it won't display
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2011-10-28T01:52:49.413
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2011-10-28T03:43:24.197
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2011-10-28T03:43:24.197
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When i add a TextView which layout_with is wrap_content to a linearlayout, the TextView won't display because the measured width is 0. But i give the text a fixed with, i display properly. this is the code will display a red block on the screen <pre><code> private void setupDialerTab() { Intent intent = new Intent("com.android.phone.action.TOUCH_DIALER"); intent.setClass(this, TwelveKeyDialer.class); StickyTabs.setTab(intent, TAB_INDEX_DIALER); View view = new View(this); view.setBackgroundColor(Color.RED); view.setLayoutParams(new LayoutParams(80, 80)); mTabHost.addTab(mTabHost.newTabSpec("dialer") .setIndicator(view) .setContent(intent)); /* mTabHost.addTab(mTabHost.newTabSpec("dialer") .setIndicator(getString(R.string.dialerIconLabel), getResources().getDrawable(R.drawable.ic_tab_dialer)) .setContent(intent)); */ } </code></pre> This is the code nothing will display. <pre><code> private void setupContactsTab() { Intent intent = new Intent(UI.LIST_DEFAULT); intent.setClass(this, ContactsListActivity.class); StickyTabs.setTab(intent, TAB_INDEX_CONTACTS); TextView tv = new TextView(this); tv.setText("hb2"); mTabHost.addTab(mTabHost.newTabSpec("contacts") .setIndicator(tv) .setContent(intent)); /* mTabHost.addTab(mTabHost.newTabSpec("contacts") .setIndicator(getText(R.string.contactsIconLabel), getResources().getDrawable(R.drawable.ic_tab_contacts)) .setContent(intent)); */ } </code></pre> I have found the solution myself. I have thought the default layoutparam of textView is wrap_content. But in fact, when i debug with hierarchy view, it turn out to be matchparent and 0. So if add <code>tv.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));</code>, everything work out good.
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When a view's layout_width is wrap_content, it won't display
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