Android编程代码速查

0 android 创建按钮Button button = new Button(this);1 android 创建输入框EditText editText = new EditText(this);2 android 创建文本TextView textView = new TextView(this);3 android 设置文本显示内容TextView textView = new TextView(this);textView.setText("hello world!");4 android 设置文本背景色TextView textView = new TextView(this);textView.setBackgroundColor(Color.YELLOW);5 android 设置文本颜色TextView textView = new TextView(this);textView.setTextColor(Color.YELLOW);6 android 设置文本文字大小TextView textView = new TextView(this);textView.setTextSize(18);7 android 设置输入框宽度EditText editText = new EditText(this);editText.setWidth(200);8 android 设置输入框为密码框EditText editText = new EditText(this);editText.setTransformationMethod( PasswordTransformationMethod.getInstance());9 android 设置输入框为密码框（xml配置）android:password="true"10 android 提示对话框的使用AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("你好");builder.setPositiveButton("OK",this);builder.show()需实现android.content.DialogInterface.OnClickListener接口11 android ListView的使用ListView listView = new ListView(this);ArrayList<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>(); SimpleAdapter adapter = new SimpleAdapter(this,list,yout.list,new String[]{"标题"},new int[]{R.id.TextView01});listView.setAdapter(adapter);listView.setOnItemClickListener(this);然后实现OnItemClickListener接口public void onItemClick(AdapterView<?> parent, View view, int position, long id) {}12 android 更新ListViewListView listView = new ListView(this);ArrayList<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>(); SimpleAdapter adapter = new SimpleAdapter(this,list,yout.list,new String[]{"标题"},new int[]{R.id.TextView01});listView.setAdapter(adapter);adapter.notifyDataSetChanged();//通知更新ListView13 android 创建LinearLayoutLinearLayout layoutParant = new LinearLayout(this);14 android 时间设置对话框的使用DatePickerDialog dlg = new DatePickerDialog(this,this,year,month,day);dlg.show();/*year month day 均为int型，第二个参数为this时，该类需要implements OnDateSetListener 并重写public void onDateSet(DatePicker view, int year, int monthOfYear,int dayOfMonth) {}*/15 android 创建FrameLayoutFrameLayout layout = new FrameLayout(this);16 android 触发键盘事件layout.setOnKeyListener(this);//需要implements OnKeyListener并重写以下方法public boolean onKey(View v, int keyCode, KeyEvent event) {return false;//返回是否销毁该事件以接收新的事件，比如返回true按下时可以不断执行这个方法，返回false则执行一次。

}17 android 触发鼠标事件layout.OnTouchListener(this);//需要implements OnTouchListener并重写以下方法public boolean onTouch(View v, MotionEvent event) {return false;//返回是否销毁该事件以接收新的事件，比如返回true按下时可以不断执行这个方法，返回false则执行一次。

}18 android 获得屏幕宽度和高度int width = this.getWindow().getWindowManager().getDefaultDisplay().getWidth();int height =this.getWindow().getWindowManager().getDefaultDisplay().getHeight();19 android 布局添加控件LinearLayout layout = new LinearLayout(this);Button button = new Button(this);layout.addView(button);20 android intent实现activit之间跳转Intent intent = new Intent();intent.setClass(this, DestActivity.class);startActivity(intent);21 android intent设置actionIntent intent = new Intent();intent.setAction(intent.ACTION_DIAL);22 android intent设置dataIntent intent = new Intent();intent.setData(Uri.parse("tel:00000000"));23 android intent传数据Intent intent = new Intent();intent.putExtra("data", value);//value可以是很多种类型，在接收activity中取出后强制转换或调用相应类型的get函数。

24 android intent取数据String value = (String)getIntent().getExtras().get("data");//orString value = getIntent().getExtras().getString("data");25 android 利用paint和canvas画图setContentView(new MyView(this));class MyView extends View{public MyView(Context context){super(context);}public void onDraw(Canvas canvas){Paint paint = new Paint();//创建画笔paint.setColor(Color.BLUE);//设置画笔颜色canvas.drawRect(0, 0, 100, 100, paint);//画个正方形，坐标0，0，100，100。

}}26 android 新建对话框Dialog dialog = new Dialog(this);dialog.setTitle("test");//设置标题dialog.addContentView(button,new LayoutParams(-1,-1));//添加控件,-1是设置高度和宽度充满布局，-2是按照需要设置宽度高度。

dialog.show();27 android 取消对话框dialog.cancel();28对View类刷新显示view.invalidate();//通过这个调用view的onDraw()函数28 android 对View类刷新显示view.invalidate();//通过这个调用view的onDraw()函数29 android 使用SurfaceView画图setContentView(new MySurfaceView(this));class MySurfaceView extends SurfaceView implements SurfaceHolder.Callback{SurfaceHolder holder;public MySurfaceView(Context context){super(context);holder = getHolder();holder.addCallback(this);}class MyThread extends Thread{public void run(){ Canvas canvas = holder.lockCanvas(); Paint paint = new Paint();paint.setColor(Color.YELLOW); canvas.drawRect(100, 100, 200, 200, paint); holder.unlockCanvasAndPost(canvas);}}public void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {}public void surfaceCreated(SurfaceHolder holder) {new MyThread().start();}public void surfaceDestroyed(SurfaceHolder holder) {}}30 android 获得控件findViewByIdTextView textView = (TextView) findViewById(R.id.TextView01);31 android 十六进制设置画笔颜色Paint paint = new Paint();paint.setColor(0xffffffff);//第一个ff是透明度的设置。