安卓开发之界面篇

MainActivity.java
package com.example.weather;

//import com.example.weiai.MainActivity;
//import com.example.weiai.SecActivity;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;

public class MainActivity extends Activity {

 final static int menu_forecast = Menu.FIRST;
 final static int menu_history = Menu.FIRST+1;
 final static int menu_setting = Menu.FIRST+2;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
 }

 @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);
  menu.add(0,menu_forecast,0,"天气预报");
  menu.add(0,menu_history,1,"历史数据");
  menu.add(0,menu_setting,2,"系统设置");
   
  
  return true;
 }

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  // TODO Auto-generated method stub
 // return super.onOptionsItemSelected(item);
 
  switch(item.getItemId())
  {
  case menu_forecast:
   Intent in = new Intent(MainActivity.this,ShareActivity.class);
   startActivity(in);
   
   return true;
  case menu_history:
   Intent in1= new Intent(MainActivity.this,HistoryActivity.class);
   startActivity(in1);
   
   return true;
  case menu_setting:
   Intent in2= new Intent(MainActivity.this,SettingActivity.class);
   startActivity(in2);
   return true;
  
  }
  return false;
  
  
 }

 
}

SettingActivity.java

package com.example.weather;

import android.R.menu;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;

public class SettingActivity extends Activity {

 final static int menu_history1 = Menu.FIRST;
 final static int menu_setting2= Menu.FIRST+1;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_setting);
  
  
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  //getMenuInflater().inflate(R.menu.setting, menu);
  
  menu.add(0,menu_history1,0,"历史数据");
  menu.add(0,menu_setting2,1,"天气预报");
  return true;
 }

 public boolean onOptionsItemSelected(MenuItem item) {
  // TODO Auto-generated method stub
 // return super.onOptionsItemSelected(item);
 
  switch(item.getItemId())
  {
  case menu_history1:
   Intent in1= new Intent(SettingActivity.this,HistoryActivity.class);
   startActivity(in1);
   
   return true;
  case menu_setting2:
   Intent in2= new Intent(SettingActivity.this,ShareActivity.class);
   startActivity(in2);
   return true;
  
  }
  return false;
  
  
 }
}

ShareActivity.java

package com.example.weather;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class ShareActivity extends Activity {

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

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.share, menu);
  return true;
 }

}