Android：将数字画在图片上合成一张图的两种实现方法（二）

来源：互联网发布：c语言编程九九乘法表编辑：程序博客网时间：2024/04/28 08:36
方法实现如下：
package com.example.mytest;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Paint.FontMetrics;import android.graphics.Rect;import android.graphics.Typeface;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.widget.TextView;public class MainActivity extends Activity {    private TextView mTextView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        mTextView = (TextView) findViewById(R.id.test);        Thread thread = new Thread() {            @Override            public void run() {                Drawable mPointMenuBmp = initCounterResources(3);                Message message = handler.obtainMessage();                message.what = 1;                message.obj = mPointMenuBmp;                handler.sendMessage(message);                super.run();            }        };        thread.start();    }    Handler handler = new Handler() {        @Override        public void handleMessage(Message msg) {            Drawable mPointMenuBmp = (Drawable) msg.obj;            mTextView.setCompoundDrawablesWithIntrinsicBounds(null, null, mPointMenuBmp, null);            super.handleMessage(msg);        }    };    /** <br>功能简述:画出小红点     * <br>功能详细描述:     * <br>注意:     * @param count     */    private Drawable initCounterResources(int count) {        Drawable mCounterDrawable = null;        Bitmap bitmapDrawable = null;        if (mCounterDrawable == null) {            // 初始化画布            mCounterDrawable = getResources().getDrawable(R.drawable.go_account_stat_notify);            Bitmap bitmapDrawables = ((BitmapDrawable) mCounterDrawable).getBitmap();            int bitmapX = bitmapDrawables.getWidth();            int bitmapY = bitmapDrawables.getHeight();            bitmapDrawable = Bitmap.createBitmap(bitmapX, bitmapY, Bitmap.Config.ARGB_8888);            Canvas canvas = new Canvas(bitmapDrawable);            // 拷贝图片            Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);            mPaint.setDither(true);// 防抖动            mPaint.setFilterBitmap(true);// 用来对Bitmap进行滤波处理，这样，当你选择Drawable时，会有抗锯            Rect src = new Rect(0, 0, bitmapX, bitmapX);            Rect dst = new Rect(0, 0, bitmapX, bitmapX);            canvas.drawBitmap(((BitmapDrawable) mCounterDrawable).getBitmap(), src, dst, mPaint);            //            canvas.drawBitmap(bitmapDrawable, bitmapX, bitmapY, mPaint);            //画数字            mPaint.setTextAlign(Paint.Align.CENTER);            mPaint.setTypeface(Typeface.DEFAULT_BOLD);            mPaint.setColor(Color.BLACK);            mPaint.setTextSize(20);            FontMetrics fontMetrics = mPaint.getFontMetrics();            canvas.drawText(String.valueOf(count), 56, 56 + (fontMetrics.bottom - fontMetrics.top) / 4, mPaint);            canvas.save();        }        return new BitmapDrawable(getResources(), bitmapDrawable);    }}
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