心如止水 宠辱不惊

从A界面打开B界面， B界面关闭的时候，返回一个数据给A界面步骤： 1. 开启activity并且获取返回值 startActivityForResult(intent, 0);在新开启的界面里面实现设置数据的逻辑Intent data = new Intent();data.putExtra("phone", phone);//设置一个结果数据，数据会

public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activit

默认情况下 ，横竖屏切换， 销毁当前的activity，重新创建一个新的activity快捷键ctrl+F11在一些特殊的应用程序常见下，比如游戏，不希望横竖屏切换activity被销毁重新创建 需求：禁用掉横竖屏切换的生命周期 1. 横竖屏写死 android:screenOrientation="landscape"       android:screenOrie

public class MainActivity extends Activity { List personList; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentVie

public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Stri

public class MainActivity extends Activity { List smsList; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_

MainActivity.javapublic class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView

void onCreate()Activity已经被创建完毕void onStart()Activity已经显示在屏幕，但没有得到焦点void onResume()Activity得到焦点，可以与用户交互void onPause()Activity失去焦点，无法再与用户交互，但依然可见void onStop()Activi

UI.runOnUiThread(new Runnable() { @Override public void run() { // TODO Auto-generated method stub View view = LayoutInflater.from(TEApp.getAppContext()).inf

public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub ViewHolder holder = null; if (convertView == null) { conve

public void onItemClick(AdapterView arg0, View arg1, int arg2, long arg3) { MyAdapter test1=(MyAdapter)arg0.getAdapter(); final String name =(String) test1.getItem(arg2);}

public class MainActivity extends Activity { List cityList; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_

public class MainActivity extends Activity { private EditText et_name; private EditText et_pass; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(saved

public class MainActivity extends Activity { private EditText et_name; private EditText et_pass; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(saved

每个应用会有一个Activity任务栈，存放已启动的ActivityActivity的启动模式，修改任务栈的排列情况standard 标准启动模式singleTop 单一顶部模式如果任务栈的栈顶存在这个要开启的activity，不会重新的创建activity，而是复用已经存在的activity。保证栈顶如果存在，不会重复创建。应用场景：浏览器的书签

ViewHolder holder = null; if (convertView == null) { convertView = inflater.inflate(R.layout.adpter_templayer_item, arg2, false); holder = new ViewHolde

package com.itheima.rwinrom;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.

1.设置背景图片，图片来源于drawable；flightInfoPanel.setBackgroundDrawable(getResources().getDrawable(R.drawable.search_label_click));2.转换字符串为int（颜色）；listItemView.deleteFilghtBg.setBackgroundColor(Color.parse

输入拨号需要加入的数据，  如17951， 存入SharedPreferences package com.itheima.ipdialer;import android.os.Bundle;import android.app.Activity;import android.content.SharedPreferences;import android.view.Menu;im

public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activit

public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activit

public class MainActivity extends Activity { @SuppressWarnings("deprecation") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(

核心类：AlertDialog， 处理都是由内部类来搞。 public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.la

public class MainActivity extends Activity implements OnClickListener{ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setCo

//由系统调用，获取一个View对象，作为ListView的条目 //position:本次getView方法调用所返回的View对象，在listView中是处于第几个条目，那么position的值就是多少 @Override public View getView(int position, View convertView, ViewGroup parent) { Perso