Android仿Iphone通知角標的實現(二)

MainActivity如下:

package cc.testtipmessage1;import android.os.Bundle;import android.widget.ImageView;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Bitmap.Config;import android.graphics.BitmapFactory;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Rect;import android.graphics.Typeface;/** * Demo描述: * 仿Iphone通知角標的實現,藉以提示使用者有幾條新的資訊 *  * 參考資料: * http://blog.csdn.net/t12x3456/article/details/9337561 * Thank you very much */public class MainActivity extends Activity {    private ImageView mImageView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);init();}    private void init(){    mImageView=(ImageView) findViewById(R.id.imageView);    Bitmap rawBitmap=BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);    Bitmap newBitmap=createNewBitmap(rawBitmap);    mImageView.setImageBitmap(newBitmap);    }    private Bitmap createNewBitmap(Bitmap rawBitmap){    //建立畫布    int width=rawBitmap.getWidth();    int height=rawBitmap.getHeight();    Bitmap newBitmap=Bitmap.createBitmap(width, height, Config.ARGB_8888);    Canvas canvas=new Canvas(newBitmap);    //--->先畫原來的圖片    Paint bitmapPaint=new Paint();    //防止抖動    bitmapPaint.setDither(true);    //對Bitmap進行濾波處理    bitmapPaint.setFilterBitmap(true);    Rect src=new Rect(0, 0, rawBitmap.getWidth(), rawBitmap.getHeight());        Rect dst=new Rect(0, 0, newBitmap.getWidth(), newBitmap.getHeight());        canvas.drawBitmap(rawBitmap, src, dst, bitmapPaint);          //--->再畫新加的數字    Paint countPaint=new Paint(Paint.ANTI_ALIAS_FLAG|Paint.DEV_KERN_TEXT_FLAG);        countPaint.setColor(Color.RED);        countPaint.setTextSize(20f);        countPaint.setTypeface(Typeface.DEFAULT_BOLD);        canvas.drawText("5", 18, 25, countPaint);    return newBitmap;    }}

 

main.xml如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    >    <ImageView        android:id="@+id/imageView"        android:layout_width="100dip"        android:layout_height="100dip"        android:layout_centerInParent="true"   /></RelativeLayout>