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Android Hello World程式

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package com.example.android_hello;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup; import android.os.Build; import android.app.Activity; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // if (savedInstanceState == null) {
// getSupportFragmentManager().beginTransaction() // .add(R.id.container, new PlaceholderFragment()).commit(); // } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu);
return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } /** * A placeholder fragment containing a simple view. */ // public static class PlaceholderFragment extends Fragment { // // public PlaceholderFragment() { // } // // @Override // public View onCreateView(LayoutInflater inflater, ViewGroup container, // Bundle savedInstanceState) { // View rootView = inflater.inflate(R.layout.fragment_main, container, // false); // return rootView; // } // } }
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