android textview 文字倒影 textview 倒影

场景：制造TextView的倒影

制作TextView的倒影

package com.javaeye.graphics;

import android.app.Activity;

import android.graphics.Bitmap;

import android.graphics.Canvas;

import android.graphics.LinearGradient;

import android.graphics.Matrix;

import android.graphics.Paint;

import android.graphics.PorterDuffXfermode;

import android.graphics.Bitmap.Config;

import android.graphics.PorterDuff.Mode;

import android.graphics.Shader.TileMode;

import android.graphics.drawable.BitmapDrawable;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.TextView;

public class BitmapReflect extends Activity

{

private static final String TAG = "***BitmapFactoryOptionsTest***";

LinearLayout ly;

TextView name;

TextView phone;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

name = new TextView(this);

phone = new TextView(this);

name.setText("bruce zhang");

phone.setText("13739188962");

ly = new LinearLayout(this);

ly.setOrientation(LinearLayout.VERTICAL);

LinearLayout.LayoutParams llp = new LinearLayout.LayoutParams(

LinearLayout.LayoutParams.WRAP_CONTENT,

LinearLayout.LayoutParams.WRAP_CONTENT);

ly.setLayoutParams(llp);

ly.addView(name);

ly.addView(phone);

Button button = new Button(this);

button.setText("OK");

button.setOnClickListener(new View.OnClickListener()

{

@Override

public void onClick(View v)

{

int width = phone.getWidth();

int height = name.getHeight() + phone.getHeight();

Log.e(TAG, "width: " + width + " height: " + height);

Bitmap.Config bc = Bitmap.Config.ARGB_8888;

Bitmap bitmap = Bitmap.createBitmap(width, height, bc);

Canvas canvas = new Canvas(bitmap);

ly.draw(canvas);

Bitmap bitmap2 = createReflectedImage(bitmap);

ImageView image = new ImageView(BitmapReflect.this);

image.setBackgroundDrawable(new BitmapDrawable(bitmap2));

ly.addView(image);

ly.postInvalidate();

}

});

ly.addView(button);

setContentView(ly);

}

public static Bitmap createReflectedImage(Bitmap originalImage) {

final int reflectionGap = 4; //倒影和原图片间的距离

int width = originalImage.getWidth();

int height = originalImage.getHeight();

Matrix matrix = new Matrix();

matrix.preScale(1, -1);

//倒影部分

Bitmap reflectionImage = Bitmap.createBitmap(originalImage,

0, height / 2, width, height / 2, matrix, false);

//要返回的倒影图片

Bitmap bitmapWithReflection = Bitmap.createBitmap(width,

(height + height / 2), Config.ARGB_8888);

Canvas canvas = new Canvas(bitmapWithReflection);

//画原来的图片

canvas.drawBitmap(originalImage, 0, 0, null);

Paint defaultPaint = new Paint();

//倒影和原图片间的距离

canvas.drawRect(0, height, width, height + reflectionGap, defaultPaint);

//画倒影部分

canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);

Paint paint = new Paint();

LinearGradient shader = new LinearGradient(0, originalImage.getHeight(),

0, bitmapWithReflection.getHeight() + reflectionGap,

0x70ffffff, 0x00ffffff,

TileMode.MIRROR);

paint.setShader(shader);

paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));

canvas.drawRect(0, height, width, bitmapWithReflection.getHeight() + reflectionGap, paint);

return bitmapWithReflection;

}

}