fanfou(饭否） android客户端 代码学习1

LoginActivity.class类

 

 

Intent intent = getIntent().getParcelableExtra(Intent.EXTRA_INTENT);

 String action = intent.getAction();

 if (intent.getAction() == null || !Intent.ACTION_SEND.equals(action)) {

      intent = new Intent(this, TwitterActivity.class); 

} 

 

 getIntent().getParcelableExtra(String activityname).. 从intent中检索继承的数据

Intent.EXTRA_INTENT    intent里面传递的类名

// 发送消息给
widget Intent reflogin = new Intent(this.getBaseContext(), FanfouWidget.class);

reflogin.setActio("android.appwidget.action.APPWIDGET_UPDATE"); 

PendingIntent l = PendingIntent.getBroadcast(this.getBaseContext(), 0, reflogin, PendingIntent.FLAG_UPDATE_CURRENT);
 try {
      l.send();
 } catch... 

 

 

 Intent和PendingIntent的区别

 

ApplicationContext 和Context的区别

 

 

 

从线程的角度考虑，更多的用applicationContext,但是在用到spinner时候出现uncaught exception 

LayoutInflater layoutInflater = LayoutInflater.from(this
				.getBaseContext());
		// beneath param will brought uncaught problem
		// LayoutInflater layoutInflater = LayoutInflater.from(this.getApplicationContext()); 
		View view = ContactViewer.mLayoutInflater.inflate(R.layout.aViewContainingASpinner, 
				theParentView, false);
		 Spinner spinner = (Spinner) view.findViewById(R.id.theSpinnerId);
		 String[] myStringArray = new String[] {"sweet","love"}; 
		 // managing adapter part 
		 // The context used here don't have any importance -- both work. 
		 ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
				 this.getApplicationContext(), myStringArray, android.R.layout.simple_spinner_item); 
		 adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
		 spinner.setAdapter(adapter); 
		 theParentView.addView(view); 

 

  

 

 the baseContext is required when dealing with contextMenu in your Activity...