文字特效

admin

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可以考虑给文字加一些特效，这样看起来更酷

package com.asysbang.uidemo;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.EmbossMaskFilter;
import android.graphics.MaskFilter;
import android.graphics.Paint;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.View;

public class TextEffectView extends View {

    private Paint textPaint;
   
     private MaskFilter  mEmboss;

    private static final String text = "你好！今天是星期三！";

    private static final int MSG_IN = 10;

    private static final int EFFECT_SHOW_DELAY = 200;

    private static final int TEXT_SIZE_1 = 80;

    private static final int TEXT_SIZE_2 = 120;

    private static final int START_X = 30;

    private static final int START_Y = 400;

    private int curPosition = 0;

    private Handler mHandler = new Handler() {

        @Override
        public void handleMessage(Message msg) {
            curPosition++;
            if (curPosition <= text.length() * 2) {
                invalidate();
                mHandler.sendEmptyMessageDelayed(MSG_IN, EFFECT_SHOW_DELAY);
            }
        }

    };

    public TextEffectView(Context context, AttributeSet attrs) {
        super(context, attrs);
        textPaint = new Paint();
        textPaint.setColor(Color.CYAN);
        textPaint.setStyle(Paint.Style.STROKE);
        textPaint.setStrokeJoin(Paint.Join.ROUND);
        textPaint.setStrokeCap(Paint.Cap.ROUND);
        textPaint.setStrokeWidth(2);
        
        mEmboss = new EmbossMaskFilter(new float[] { 1, 1, 1 },
                0.4f, 6, 3.5f);
        textPaint.setMaskFilter(mEmboss);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        String str = text.substring(0, curPosition / 2);
        System.out.println("==========" + str);
        textPaint.setTextSize(TEXT_SIZE_1);
        canvas.drawText(str, START_X, START_Y, textPaint);
        if (curPosition % 2 > 0) {
            textPaint.setTextSize(TEXT_SIZE_2);
            String str1 = text.substring(curPosition / 2, curPosition / 2 + 1);
            canvas.drawText(str1, START_X / 2 + TEXT_SIZE_2 - TEXT_SIZE_1 + TEXT_SIZE_1 * curPosition / 2, START_Y, textPaint);
        }
    }

    public void textIn() {
        mHandler.removeMessages(MSG_IN);
        curPosition = 0;
        mHandler.sendEmptyMessage(MSG_IN);
    }

}