Android 自訂View

Android 自訂View為MyCustomView。在MyCustomView畫了一個Rect，

顏色為Green，和一個為紅色的文字。

public class MyCustomView extends View{ private Paint mPaint;       private Context mContext;       private static final String mString = "Hello world!";  public MyCustomView(Context context) {super(context);// TODO Auto-generated constructor stub}public MyCustomView(Context context, AttributeSet attr) {super(context,attr);// TODO Auto-generated constructor stub} @Override       protected void onDraw(Canvas canvas) {           // TODO Auto-generated method stub           super.onDraw(canvas);                      mPaint = new Paint();                    mPaint.setColor(Color.GREEN);         mPaint.setStyle(Style.FILL);                  canvas.drawRect(new Rect(10, 10, 300, 500), mPaint);                      mPaint.setColor(Color.RED);           canvas.drawText(mString, 50, 550, mPaint);  }}

 將自訂的View添加到activity_main的Layout中

<?xml version="1.0" encoding="utf-8"?>      <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"          android:orientation="vertical"          android:layout_width="fill_parent"          android:layout_height="fill_parent"          >      <TextView            android:layout_width="fill_parent"           android:layout_height="wrap_content"           android:text="@string/hello_world"          />     <com.example.customview.MyCustomView        android:layout_width="fill_parent"       android:layout_height="fill_parent"       />    </LinearLayout>

 參考

其中Layout中的<com.example.customview.MyCustomView />就是對該自訂控制項的使用。