Question

我从自定义对话框调用片段。但我不能称之为片段。我的onClick调用函数

  public void text_noteClick(View v){
    Fragment fragments = new Text_Note_Fragment();
    FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
    transaction.replace(R.layout.note_text, fragments);
    transaction.addToBackStack(null);
    Toast.makeText(getApplicationContext(),"text",Toast.LENGTH_SHORT).show();
}

Toast成功运作。 Text_Note_Fragment类是

public class Text_Note_Fragment extends Fragment {
public Text_Note_Fragment() {

}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view;
    view = inflater.inflate(R.layout.note_text,container,false);
    return view;
}

} 我认为问题是片段替换功能。对不起我的英文:) TNX

Answer 1

我想这一行是根本原因。

@Override 
protected void onResume() {
    super.onResume();
    boolean installed = false;

    while (!installed) {
        installed = appInstalledOrNot (APPPACKAGE);
        if (installed) {
            Toast.makeText(this, "App installed", Toast.LENGTH_SHORT).show ();
        }
    }
} 

private boolean appInstalledOrNot (String uri) {
    PackageManager pm = getPackageManager();
    boolean app_installed = false;
    try {
        pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);
        app_installed = true;
    } catch (PackageManager.NameNotFoundException e) {
        app_installed = false;
    }
    return app_installed;
}

我看到您在transaction.replace(R.layout.note_text, fragments);函数中使用了R.layout.note_text，这是您片段的布局xml。但为什么你在替换功能中使用它？你应该使用一个容器（通常是一个FrameLayout），就像这样。

onCreateView

从自定义对话框调用android片段

1 个答案: