Android context menu simple

ContextMenu харахдаа анх холбож өгсөн компонент дээрээ удаан дараад авахад гарч ирнэ

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.example">
    <application android:icon="@drawable/icon" android:label="Simple Android Project">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
</manifest>

res/layout/main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
    <TextView
            android:id="@+id/text"
            android:textColor="?android:textColorPrimary"
            android:text="hello"
            android:background="@android:drawable/title_bar"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" />
    <Button
            android:id="@+id/button"
            android:text="call contextmenu"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"           
            />
</LinearLayout>


res/layout/contextmenu.xml not use.


MainActivity.java

package com.example;

import android.app.Activity;
import android.os.Bundle;
import android.view.*;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.Toast;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Button btn = (Button) findViewById(R.id.button);
        registerForContextMenu(btn);
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);
        menu.setHeaderTitle("Context Menu");
        menu.add(0, v.getId(), 0, "Action 1");
        menu.add(0, v.getId(), 0, "Action 2");
    }

    @Override
    public boolean onContextItemSelected(MenuItem item) {
        if(item.getTitle()=="Action 1"){function1(item.getItemId());}
        else if(item.getTitle()=="Action 2"){function2(item.getItemId());}
        else {return false;}
        return true;
    }

    public void function1(int id){
        Toast.makeText(this, "function 1 called", Toast.LENGTH_SHORT).show();
    }
    public void function2(int id){
        Toast.makeText(this, "function 2 called", Toast.LENGTH_SHORT).show();
    }
}