doracoin ревизий этого фрагмента . К ревизии
1 file changed, 237 insertions
Watermark.java(файл создан)
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| 1 | + | import android.app.Activity; | |
| 2 | + | import android.content.res.Resources; | |
| 3 | + | import android.graphics.Canvas; | |
| 4 | + | import android.graphics.ColorFilter; | |
| 5 | + | import android.graphics.Paint; | |
| 6 | + | import android.graphics.PixelFormat; | |
| 7 | + | import android.graphics.drawable.Drawable; | |
| 8 | + | import android.text.TextUtils; | |
| 9 | + | import android.view.View; | |
| 10 | + | import android.view.ViewGroup; | |
| 11 | + | import android.widget.FrameLayout; | |
| 12 | + | ||
| 13 | + | import androidx.annotation.IntRange; | |
| 14 | + | import androidx.annotation.NonNull; | |
| 15 | + | import androidx.annotation.Nullable; | |
| 16 | + | ||
| 17 | + | /** | |
| 18 | + | * 水印 | |
| 19 | + | */ | |
| 20 | + | public class Watermark { | |
| 21 | + | /** | |
| 22 | + | * 水印文本 | |
| 23 | + | */ | |
| 24 | + | private String mText; | |
| 25 | + | /** | |
| 26 | + | * 字体颜色(argb)，十六进制形式，例如：0xAEAEAEAE | |
| 27 | + | */ | |
| 28 | + | private int mTextColor; | |
| 29 | + | /** | |
| 30 | + | * 字体大小，单位为sp | |
| 31 | + | */ | |
| 32 | + | private float mTextSize; | |
| 33 | + | /** | |
| 34 | + | * 旋转角度 | |
| 35 | + | */ | |
| 36 | + | private float mRotation; | |
| 37 | + | private static Watermark sInstance; | |
| 38 | + | ||
| 39 | + | private Watermark() { | |
| 40 | + | mText = ""; | |
| 41 | + | mTextColor = 0xAECECECE; | |
| 42 | + | mTextSize = 18; | |
| 43 | + | mRotation = -45; | |
| 44 | + | } | |
| 45 | + | ||
| 46 | + | public static Watermark getInstance() { | |
| 47 | + | if (sInstance == null) { | |
| 48 | + | synchronized (Watermark.class) { | |
| 49 | + | sInstance = new Watermark(); | |
| 50 | + | } | |
| 51 | + | } | |
| 52 | + | return sInstance; | |
| 53 | + | } | |
| 54 | + | ||
| 55 | + | /** | |
| 56 | + | * 设置水印文本 | |
| 57 | + | * | |
| 58 | + | * @param text 文本 | |
| 59 | + | * @return Watermark实例 | |
| 60 | + | */ | |
| 61 | + | public Watermark setText(String text) { | |
| 62 | + | mText = text; | |
| 63 | + | return sInstance; | |
| 64 | + | } | |
| 65 | + | ||
| 66 | + | /** | |
| 67 | + | * 设置字体颜色 | |
| 68 | + | * | |
| 69 | + | * @param color 颜色，十六进制形式，例如：0xAEAEAEAE | |
| 70 | + | * @return Watermark实例 | |
| 71 | + | */ | |
| 72 | + | public Watermark setTextColor(int color) { | |
| 73 | + | mTextColor = color; | |
| 74 | + | return sInstance; | |
| 75 | + | } | |
| 76 | + | ||
| 77 | + | /** | |
| 78 | + | * 设置字体大小 | |
| 79 | + | * | |
| 80 | + | * @param size 大小，单位为sp | |
| 81 | + | * @return Watermark实例 | |
| 82 | + | */ | |
| 83 | + | public Watermark setTextSize(float size) { | |
| 84 | + | mTextSize = size; | |
| 85 | + | return sInstance; | |
| 86 | + | } | |
| 87 | + | ||
| 88 | + | /** | |
| 89 | + | * 设置旋转角度 | |
| 90 | + | * | |
| 91 | + | * @param degrees 度数 | |
| 92 | + | * @return Watermark实例 | |
| 93 | + | */ | |
| 94 | + | public Watermark setRotation(float degrees) { | |
| 95 | + | mRotation = degrees; | |
| 96 | + | return sInstance; | |
| 97 | + | } | |
| 98 | + | ||
| 99 | + | /** | |
| 100 | + | * 显示水印，铺满整个页面 | |
| 101 | + | * | |
| 102 | + | * @param activity 活动 | |
| 103 | + | */ | |
| 104 | + | public void show(Activity activity) { | |
| 105 | + | show(activity, mText); | |
| 106 | + | } | |
| 107 | + | ||
| 108 | + | /** | |
| 109 | + | * 显示水印，铺满整个页面 | |
| 110 | + | * | |
| 111 | + | * @param activity 活动 | |
| 112 | + | * @param text 水印 | |
| 113 | + | */ | |
| 114 | + | public void show(Activity activity, String text) { | |
| 115 | + | if (activity == null || TextUtils.isEmpty(text)) { | |
| 116 | + | return; | |
| 117 | + | } | |
| 118 | + | WatermarkDrawable drawable = new WatermarkDrawable(); | |
| 119 | + | drawable.mText = text; | |
| 120 | + | drawable.mTextColor = mTextColor; | |
| 121 | + | drawable.mTextSize = mTextSize; | |
| 122 | + | drawable.mRotation = mRotation; | |
| 123 | + | ||
| 124 | + | ViewGroup rootView = activity.findViewById(android.R.id.content); | |
| 125 | + | FrameLayout layout = new FrameLayout(activity); | |
| 126 | + | layout.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, | |
| 127 | + | ViewGroup.LayoutParams.MATCH_PARENT)); | |
| 128 | + | layout.setBackground(drawable); | |
| 129 | + | rootView.addView(layout); | |
| 130 | + | } | |
| 131 | + | ||
| 132 | + | /** | |
| 133 | + | * 显示水印，只给指定的View设置水印背景 | |
| 134 | + | * @param view | |
| 135 | + | * @param text | |
| 136 | + | */ | |
| 137 | + | public void show(View view, String text) { | |
| 138 | + | if (view == null || TextUtils.isEmpty(text)) { | |
| 139 | + | return; | |
| 140 | + | } | |
| 141 | + | WatermarkDrawable drawable = build(text); | |
| 142 | + | view.setBackground(drawable); | |
| 143 | + | } | |
| 144 | + | ||
| 145 | + | private WatermarkDrawable build(String text){ | |
| 146 | + | WatermarkDrawable drawable = new WatermarkDrawable(); | |
| 147 | + | drawable.mText = text; | |
| 148 | + | drawable.mTextColor = mTextColor; | |
| 149 | + | drawable.mTextSize = mTextSize; | |
| 150 | + | drawable.mRotation = mRotation; | |
| 151 | + | return drawable; | |
| 152 | + | } | |
| 153 | + | ||
| 154 | + | public FrameLayout buildWaterMarkFrame(Activity activity, String text) { | |
| 155 | + | FrameLayout layout = new FrameLayout(activity); | |
| 156 | + | layout.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, | |
| 157 | + | ViewGroup.LayoutParams.MATCH_PARENT)); | |
| 158 | + | layout.setBackground(build(text)); | |
| 159 | + | return layout; | |
| 160 | + | } | |
| 161 | + | ||
| 162 | + | private class WatermarkDrawable extends Drawable { | |
| 163 | + | private Paint mPaint; | |
| 164 | + | /** | |
| 165 | + | * 水印文本 | |
| 166 | + | */ | |
| 167 | + | private String mText; | |
| 168 | + | /** | |
| 169 | + | * 字体颜色，十六进制形式，例如：0xAEAEAEAE | |
| 170 | + | */ | |
| 171 | + | private int mTextColor; | |
| 172 | + | /** | |
| 173 | + | * 字体大小，单位为sp | |
| 174 | + | */ | |
| 175 | + | private float mTextSize; | |
| 176 | + | /** | |
| 177 | + | * 旋转角度 | |
| 178 | + | */ | |
| 179 | + | private float mRotation; | |
| 180 | + | ||
| 181 | + | private WatermarkDrawable() { | |
| 182 | + | mPaint = new Paint(); | |
| 183 | + | } | |
| 184 | + | ||
| 185 | + | @Override | |
| 186 | + | public void draw(@NonNull Canvas canvas) { | |
| 187 | + | int width = getBounds().right; | |
| 188 | + | int height = getBounds().bottom; | |
| 189 | + | int diagonal = (int) Math.sqrt(width * width + height * height); // 对角线的长度 | |
| 190 | + | ||
| 191 | + | mPaint.setColor(mTextColor); | |
| 192 | + | mPaint.setTextSize(spToPx(mTextSize)); | |
| 193 | + | mPaint.setAntiAlias(true); | |
| 194 | + | float textWidth = mPaint.measureText(mText); | |
| 195 | + | ||
| 196 | + | canvas.drawColor(0x00000000); | |
| 197 | + | canvas.rotate(mRotation); | |
| 198 | + | ||
| 199 | + | int index = 0; | |
| 200 | + | float fromX; | |
| 201 | + | for (int positionY = diagonal / 7; positionY <= diagonal; positionY += diagonal / 7) { | |
| 202 | + | fromX = -width + (index++ % 2) * textWidth; // 上下两行的X轴起始点不一样，错开显示 | |
| 203 | + | for (float positionX = fromX; positionX < width; positionX += textWidth * 3) { | |
| 204 | + | canvas.drawText(mText, positionX, positionY, mPaint); | |
| 205 | + | } | |
| 206 | + | } | |
| 207 | + | ||
| 208 | + | canvas.save(); | |
| 209 | + | canvas.restore(); | |
| 210 | + | } | |
| 211 | + | ||
| 212 | + | @Override | |
| 213 | + | public void setAlpha(@IntRange(from = 0, to = 255) int alpha) { | |
| 214 | + | } | |
| 215 | + | ||
| 216 | + | @Override | |
| 217 | + | public void setColorFilter(@Nullable ColorFilter colorFilter) { | |
| 218 | + | } | |
| 219 | + | ||
| 220 | + | @Override | |
| 221 | + | public int getOpacity() { | |
| 222 | + | return PixelFormat.TRANSLUCENT; | |
| 223 | + | } | |
| 224 | + | ||
| 225 | + | } | |
| 226 | + | ||
| 227 | + | /** | |
| 228 | + | * Value of sp to value of px. | |
| 229 | + | * | |
| 230 | + | * @param spValue The value of sp. | |
| 231 | + | * @return value of px | |
| 232 | + | */ | |
| 233 | + | public static int spToPx(float spValue) { | |
| 234 | + | float fontScale = Resources.getSystem().getDisplayMetrics().scaledDensity; | |
| 235 | + | return (int) (spValue * fontScale + 0.5f); | |
| 236 | + | } | |
| 237 | + | } | |
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