应用程序启动时弹出菜单

Question

我有一个可以在开始时选择语言的应用程序。 当前，当应用程序启动时，我必须单击“选择语言”，然后弹出包含不同语言的窗口。 但我不想单击“选择语言”选项以显示弹出窗口。 我希望我的应用在启动时自动显示弹出窗口以选择语言。 我遵循了本教程。 这是我想要实现的目标的快照。

这是Mainactivity.java的代码

public class AndroidLocalize extends Activity {
    Spinner spinnerctrl;
    Button btn;
    Locale myLocale;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        spinnerctrl = (Spinner) findViewById(R.id.spinner1);
        spinnerctrl.setOnItemSelectedListener(new OnItemSelectedListener() {

            public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
                if (pos == 1) {
                    Toast.makeText(parent.getContext(), "You have selected Tamil", Toast.LENGTH_SHORT).show();
                    setLocale("ta");
                } else if (pos == 2) {
                    Toast.makeText(parent.getContext(), "You have selected Hindi", Toast.LENGTH_SHORT).show();
                    setLocale("hi");
                } else if (pos == 3) {
                    Toast.makeText(parent.getContext(), "You have selected English", Toast.LENGTH_SHORT).show();
                    setLocale("en");
                }
                else if (pos == 4) {
                    Toast.makeText(parent.getContext(), "You have selected Arabic", Toast.LENGTH_SHORT).show();
                    setLocale("ar");
                }
            }

            public void onNothingSelected(AdapterView<?> arg0) {
                // TODO Auto-generated method stub
            }
        });
    }

    public void setLocale(String lang) {
        myLocale = new Locale(lang);
        Resources res = getResources();
        DisplayMetrics dm = res.getDisplayMetrics();
        Configuration conf = res.getConfiguration();
        conf.locale = myLocale;
        res.updateConfiguration(conf, dm);
        Intent refresh = new Intent(this, AndroidLocalize.class);
        startActivity(refresh);
    }
}

我的main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/greet"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/greet"
        android:textSize="25sp" android:gravity="center" android:paddingTop="25sp" />

    <ImageView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/sachin" android:paddingTop="25sp" />

    <TextView
        android:textColor="#ffffff"
        android:id="@+id/textView1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/langselection"
        android:textAppearance="?android:attr/textAppearanceMedium" android:gravity="center" android:paddingTop="25sp"/>

    <Spinner
        android:popupBackground="#ff004372"
        android:id="@+id/spinner1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:entries="@array/languages"
        android:gravity="center" 
        android:paddingTop="25sp" />
</LinearLayout>

Answer 1

在您的Activity onCreate()中尝试一下：

spinnerctrl = (Spinner) findViewById(R.id.spinner1);
findViewById(android.R.id.content).post(new Runnable() {
            @Override
            public void run() {
                 spinnerctrl.performClick();  
            }
});
//Rest of the code... 

在Activity onCreate期间它将自动打开spinner弹出窗口

更新

取消可运行的使用：

宣布：

 Handler handler;
 Runnable runnable;

里面onCreate()

handler = new Handler();
runnable = new Runnable() {
         public void run() {
             spinnerctrl.performClick();  
       }
   };
handler.postDelayed(this, 500);

现在，使用以下命令在onItemSelected取消它：

 public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
            if (pos == 1) {
                Toast.makeText(parent.getContext(), "You have selected Tamil", Toast.LENGTH_SHORT).show();
                setLocale("ta");
                handler.removeCallbacks(runnable); 
            } 
            //rest of the condition