显示效果如下图: 更改TabHost标签的背景颜色。
修改思路: 监听TabHost的onTabChanged方法。
实现代码:
package com.tony.tabstudy;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.TabHost;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TabWidget;
publicclass TabStudyActivity extends Activity {
@Override
publicvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final TabHost tabHost = (TabHost) findViewById(R.id.tabHost);
tabHost.setup();
TabHost.TabSpec spec = tabHost.newTabSpec("tab1");
spec.setContent(R.id.tab1);
spec.setIndicator("主页");
tabHost.addTab(spec);
TabHost.TabSpec spec2 = tabHost.newTabSpec("tab2");
spec2.setContent(R.id.tab2);
spec2.setIndicator("主页2", getResources().getDrawable(android.R.drawable.btn_dialog));
tabHost.addTab(spec2);
tabHost.setCurrentTab(1);
//初始化设置一次标签背景
updateTabBackground(tabHost);
//选择时背景更改。
tabHost.setOnTabChangedListener(new OnTabChangeListener() {
@Override
publicvoid onTabChanged(String tabId) {
updateTabBackground(tabHost);
}
});
}
/**
* 更新Tab标签的背景图
* @param tabHost
*/
privatevoid updateTabBackground(final TabHost tabHost) {
for (int i =0; i < tabHost.getTabWidget().getChildCount(); i++) {
View vvv = tabHost.getTabWidget().getChildAt(i);
if (tabHost.getCurrentTab() == i) {
//选中后的背景
vvv.setBackgroundDrawable(getResources().getDrawable(android.R.drawable.spinner_background));
} else {
//非选择的背景
vvv.setBackgroundDrawable(getResources().getDrawable(R.drawable.a));
}
}
}
}