如何从由tabactivity开始了活动更改tab​​activity的标签？或改变当前标签 [英] how to change tab of a tabactivity from an activity started by the tabactivity ? or change current tab

问题描述

public class HMITabActivity extends TabActivity{
 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        final TabHost tabHost = getTabHost();
        tabHost.addTab(tabHost.newTabSpec("Tasks")
                .setIndicator("Tasks", getResources().getDrawable(R.drawable.program))
                .setContent(new Intent(this, Tasks.class)));

        tabHost.addTab(tabHost.newTabSpec("HMI")
                .setIndicator("HMI")
                .setContent(new Intent(this, HMI.class)));
        tabHost.addTab(tabHost.newTabSpec("Diagnostics")
                .setIndicator("Diagnostics", getResources().getDrawable(R.drawable.diagnostics))
                .setContent(new Intent(this, Diagnostics.class)));
        tabHost.addTab(tabHost.newTabSpec("About")
                .setIndicator("About")
                .setContent(new Intent(this, Tasks.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)));
        //WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
        //Method[] wmMethods = wifiManager.getClass().getDeclaredMethods();


    }

}

如何从任何这些子活动改变当前选项卡（如：诊断活动）...... ??

how to change the current tab from any of these sub activities (eg: Diagnostics activity).... ??

推荐答案

从子活动：

((TabActivity) getParent()).getTabHost().setCurrentTab(2)

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