Question

我正在尝试使用以下代码创建标签式活动



public class FragmentTabs extends FragmentActivity {

private FragmentTabHost mTabHost;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
    mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);

    mTabHost.addTab(mTabHost.newTabSpec("simple").setIndicator("Simple"),
            SimpleFrag.class, null);

    mTabHost.addTab(mTabHost.newTabSpec("detailed").setIndicator("Detailed"),
            DetailedFrag.class, null);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

}

public class FragmentTabs extends FragmentActivity { private FragmentTabHost mTabHost; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost); mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent); mTabHost.addTab(mTabHost.newTabSpec("simple").setIndicator("Simple"), SimpleFrag.class, null); mTabHost.addTab(mTabHost.newTabSpec("detailed").setIndicator("Detailed"), DetailedFrag.class, null); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; } }

代码总是显示 FragmentManager中的。我搜索了seveal次，并通过almos所有的链接。但我无法得到任何解决方案。请帮帮我，因为我坚持这个。

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以上代码有时工作正常，有时会抛出异常。

Answer 1

请尝试以下代码。

super.onCreate(savedInstanceState);
View root = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE).inflate(R.layout.activity_main, null, false);
setContentView(root);
mTabHost = (FragmentTabHost) root.findViewById(android.R.id.tabhost);
mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);
mTabHost.addTab(mTabHost.newTabSpec("simple").setIndicator("Simple"),SimpleFrag.class, null);
mTabHost.addTab(mTabHost.newTabSpec("detailed").setIndicator("Detailed"), DetailedFrag.class, null);

Answer 2

尝试使用：

if (savedInstanceState == null) {
        // write code here
    }

如果没有传达代码

java.lang.IllegalStateException：使用FragmentTabHost时，无法在onSaveInstanceState之后执行此操作

2 个答案: