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新手教程，双击返回退出软件 //双击手机返回键退出软件 @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN) { if (System.currentTimeMillis() - firstTime > 2000) { Toast.makeText(MainActivity.this, "再按一次退出程序", Toast.LENGTH_SHORT).show(); firstTime = System.currentTimeMillis(); } else { finish(); System.exit(0); } return true; } return super.onKeyDown(keyCode, event); }

新手教程点击布局框效果一：新建bg.xml   <item android:drawable="@color/login_normal_color" android:state_focused="true" />  <item android:drawable="@color/login_normal_color" android:state_pressed="true" />  <item android:drawable="@color/white" /> 二：通过android:background=”@drawable/sex_selected_bg”引用引用到需要的xml布局 <LinearLayout android:background="@drawable/bg" android:id="@+id/my_ll" android:layout_width="match_parent" android:layout_height="@dimen/item_height" android:gravity="center" android:orientation="horizontal" android:paddingLeft="@dimen/margin_left_right" android:paddingRight="@dimen/margin_left_right"> </LinearLayout>

简单跳转，提示，启动页，分享代码跳转代码 public void zfbxx(View V) {Intent intent=new Intent(); intent.setClass(MainActivity.this,zfbzf.class); startActivity(intent);} 点击简单提示 public void chushihua(View V) {Toast.makeText(getApplication(),"正在初始化，请稍等！",Toast.LENGTH_LONG).show(); 启动页 Timer timer=new Timer();//计时器 timer.schedule(task, 2000); } TimerTask task=new TimerTask() { @Override public void run() {Intent intent=new Intent();//启动页绑定xml intent.setClass(logoh.this,MainActivity.class); startActivity(intent); finish();//计时结束销毁启动页 }};} 跳转QQ Intent intent =new Intent(); intent.setData(Uri.parse("mqqwpa://im/chat?chat_type=wpa&uin=号码")); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 分享文本 public void fenxiang(View View)//分享 {Intent sendIntent = new Intent(); sendIntent.setAction(Intent.ACTION_SEND); sendIntent.putExtra(Intent.EXTRA_TEXT,"分享内容"); sendIntent.setType("text/plain"); startActivity(Intent.createChooser(sendIntent,"分享"));} 相对应的控件onclick我就不说了，以上都是Java代码防止吞代码，截个图，

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