Android记事本.doc

1.只是在主程序里面添加此代码：TextView textView = new TextView(this); textView.setText(你好啊);setContentView(textView);就会在Android虚拟机上显示“你好啊”2.只在Main.xml里面添加代码：3. 4.设置超链接： android:autoLink=”all”5.跑马灯：android:singleLine=”true”把所以要跑马灯的都显示成一行android:focusable=trueandroid:ellipsize=marqueeandroid:marqueeRepeatLimit=marquee_foreverandroid:focusableInTouchMode=true6.设置字体颜色：TextView tv = (TextView) findViewById(R.id.tv);String str = 欢迎大家收看Android开发从零开始系列课程，感谢大家的支持。;SpannableStringBuilder style = new SpannableStringBuilder(str);style.setSpan(new ForegroundColorSpan(Color.RED), 0, 6,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);style.setSpan(new ForegroundColorSpan(Color.GREEN), 6, 21,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);style.setSpan(new ForegroundColorSpan(Color.BLUE), 21, 26,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);tv.setText(style);7.8.private AlphaAnimation an1 = new AlphaAnimation(1, 0);定义他的动画，是android自带的an1.setDuration(1000);休息的时间问1000毫秒imgv1.startAnimation(an1);/ startAnimation 启动动画9.给自己的界面设置空间大小Android:layout_weight=”X”10.实现图片的循环a先取得getContext的返回最大值Public int getContext()Return Integer.MAX_VALUE;b有就是设置图片给ImageView对象Imageview.setImageResource(residesposition%resIds.length); c.我们还可以给图片添加一个边框首先定义一个int mGalleryItemBackground;，然后取得Gallery属性的Index id的值public ImageAdapter(Context c) mContext = c;/ 使用在res/value/attrs.xml中的Gallery属性TypedArray a = obtainStyledAttributes(R.styleable.Gallery);/ 取得Gallery属性的Index idmGalleryItemBackground = a.getResourceId(R.styleable.Gallery_android_galleryItemBackground, 0);/ 让对象的styleable属性能够反复使用a.recycle();在res/value/attrs.xml的代码 11. AlertDialog的使用AlertDialog.Builder builder = new AlertDialog.Builder(C018_onDoubleClickActivity.this);builder.setTitle(双击);builder.setMessage(Very Good);builder.show();图片的淡进淡出：AlphaAnimationaa = new AlphaAnimation(1, 0);/ 1, 0从透明到不透明图片的移动：TranslateAnimationta = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 1.0f, Animation.RELATIVE_TO_SELF,0.5f, Animation.RELATIVE_TO_SELF, 0.5f);ta.setDuration(3000);/显示的时间startAnimation(al);/启动startAnimation(ta);图片的旋转：RotateAnimationra = new RotateAnimation(0, 720, Animation.RELATIVE_TO_PARENT, 0.5f, Animation.RELATIVE_TO_PARENT, 0.5f);图片的伸缩：ScaleAnimationsa = new ScaleAnimation(0, 1, 0, 1, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);帧动画Alpha渐变效果共同属性fromX, toX, fromY, toY, pivotXType, pivotXValue, pivotYType, pivotYValueCanvas图形的绘制方法说明drawRect绘制矩形drawCircle绘制圆形（STROKE空心）（FILL实心）drawOval绘制椭圆drawLine绘制直线drawPoint绘制点TabHost添加背景图片tabHost.addTab(tabHost.newTabSpec(Second).setIndicator(Second,getResources().getDrawable(android.R.drawable.alert_dark_frame);用Timer获取系统的时间private Timer timer;private TimerTask task;Overridepublic int onStartCommand(Intent intent, int flags, int startId) timer = new Timer();task = new TimerTask() Overridepublic void run() Calendar c = Calendar.getInstance();String time = c.get(Calendar.HOUR_OF_DAY) + :+ c.get(Cale