版权声明：本文为luoyong原创文章，转载请注明出处！https://blog.csdn.net/luoyong_blog https://blog.csdn.net/luoyong_blog/article/details/84251252
这是我在项目中常用到的数据类型转换、单位、日期转换工具，为了怕以后找不到故记录于此。
import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.graphics.*;
import android.graphics.drawable.*;
import android.graphics.drawable.shapes.RoundRectShape;
import android.os.Build;
import android.util.TypedValue;
import java.io.*;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.Arrays;
/**
* Created by LY on 2015/6/12.
* 数据类型转换、单位转换
*/
public class ConvertUtils {
/**
* The constant GB.
*/
public static final long GB = 1073741824;
/**
* The constant MB.
*/
public static final long MB = 1048576;
/**
* The constant KB.
*/
public static final long KB = 1024;
/**
* 转换为6位十六进制颜色代码，不含“#”
*
* @param color the color
* @return string string
*/
public static String toColorString(int color) {
return toColorString(color, false);
}
/**
* 转换为6位十六进制颜色代码，不含“#”
*
* @param color the color
* @param includeAlpha the include alpha
* @return string string
*/
public static String toColorString(int color, boolean includeAlpha) {
String alpha = Integer.toHexString(Color.alpha(color));
String red = Integer.toHexString(Color.red(color));
String green = Integer.toHexString(Color.green(color));
String blue = Integer.toHexString(Color.blue(color));
if (alpha.length() == 1) {
alpha = "0" + alpha;
}
if (red.length() == 1) {
red = "0" + red;
}
if (green.length() == 1) {
green = "0" + green;
}
if (blue.length() == 1) {
blue = "0" + blue;
}
String colorString;
if (includeAlpha) {
colorString = alpha + red + green + blue;
// LogUtils.verbose(String.format(Locale.CHINA, "%d to color string is %s", color, colorString));
} else {
colorString = red + green + blue;
// LogUtils.verbose(String.format(Locale.CHINA, "%d to color string is %s%s%s%s, exclude alpha is %s", color, alpha, red, green, blue, colorString));
}
return colorString;
}
/**
* 将指定的日期转换为一定格式的字符串
*
* @param date the date
* @param format the format
* @return string string
*/
public static String toDateString(Date date, String format) {
SimpleDateFormat sdf = new SimpleDateFormat(format, Locale.CHINA);
return sdf.format(date);
}
/**
* 将当前的日期转换为一定格式的字符串
*
* @param format the format
* @return string string
*/
public static String toDateString(String format) {
return toDateString(Calendar.getInstance(Locale.CHINA).getTime(), format);
}
/**
* 将指定的日期字符串转换为日期时间
*
* @param dateStr 如：2014-04-08 23:02
* @return date date
*/
public static Date toDate(String dateStr) {
return DateUtils.parseDate(dateStr);
}
/**
* 将指定的日期字符串转换为时间戳
*
* @param dateStr 如：2014-04-08 23:02
* @return long long
*/
public static long toTimemillis(String dateStr) {
return toDate(dateStr).getTime();
}
/**
* To string string.
*
* @param objects the objects
* @return the string
*/
public static String toString(Object[] objects) {
return Arrays.deepToString(objects);
}
/**
* To string string.
*
* @param objects the objects
* @param tag the tag
* @return the string
*/
public static String toString(Object[] objects, String tag) {
StringBuilder sb = new StringBuilder();
for (Object object : objects) {
sb.append(object);
sb.append(tag);
}
return sb.toString();
}
/**
* To byte array byte [ ].
*
* @param is the is
* @return the byte [ ]
*/
public static byte[] toByteArray(InputStream is) {
if (is == null) {
return null;
}
try {
ByteArrayOutputStream os = new ByteArrayOutputStream();
byte[] buff = new byte[100];
int rc = 0;
while ((rc = is.read(buff, 0, 100)) > 0) {
os.write(buff, 0, rc);
}
byte[] bytes = os.toByteArray();
os.close();
return bytes;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* To byte array byte [ ].
*
* @param bitmap the bitmap
* @return the byte [ ]
*/
public static byte[] toByteArray(Bitmap bitmap) {
if (bitmap == null) {
return null;
}
ByteArrayOutputStream os = new ByteArrayOutputStream();
// 将Bitmap压缩成PNG编码，质量为100%存储，除了PNG还有很多常见格式，如jpeg等。
bitmap.compress(Bitmap.CompressFormat.PNG, 100, os);
byte[] bytes = os.toByteArray();
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
return bytes;
}
/**
* To bitmap bitmap.
*
* @param bytes the bytes
* @param width the width
* @param height the height
* @return the bitmap
*/
public static Bitmap toBitmap(byte[] bytes, int width, int height) {
Bitmap bitmap = null;
if (bytes.length != 0) {
try {
BitmapFactory.Options options = new BitmapFactory.Options();
// 不进行图片抖动处理
options.inDither = false;
// 设置让解码器以最佳方式解码
options.inPreferredConfig = null;
if (width > 0 && height > 0) {
options.outWidth = width;
options.outHeight = height;
}
bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length, options);
} catch (Exception e) {
// LogUtils.error(e);
}
}
return bitmap;
}
/**
* To bitmap bitmap.
*
* @param bytes the bytes
* @return the bitmap
*/
public static Bitmap toBitmap(byte[] bytes) {
return toBitmap(bytes, -1, -1);
}
/**
* convert Drawable to Bitmap
* 参考：http://kylines.iteye.com/blog/1660184
*
* @param drawable the drawable
* @return bitmap bitmap
*/
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public static Bitmap toBitmap(Drawable drawable) {
if (drawable instanceof BitmapDrawable) {
return ((BitmapDrawable) drawable).getBitmap();
} else if (drawable instanceof ColorDrawable) {
//color
Bitmap bitmap = Bitmap.createBitmap(32, 32, Bitmap.Config.ARGB_8888);
if (Build.VERSION.SDK_INT >= 11) {
Canvas canvas = new Canvas(bitmap);
canvas.drawColor(((ColorDrawable) drawable).getColor());
}
return bitmap;
} else if (drawable instanceof NinePatchDrawable) {
//.9.png
Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(),
drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
drawable.draw(canvas);
return bitmap;
}
return null;
}
/**
* convert Bitmap to Drawable
*
* @param bitmap the bitmap
* @return drawable drawable
*/
public static Drawable toDrawable(Bitmap bitmap) {
return bitmap == null ? null : new BitmapDrawable(null, bitmap);
}
/**
* convert Drawable to byte array
*
* @param drawable the drawable
* @return byte [ ]
*/
public static byte[] toByteArray(Drawable drawable) {
return toByteArray(toBitmap(drawable));
}
/**
* convert byte array to Drawable
*
* @param bytes the bytes
* @return drawable drawable
*/
public static Drawable toDrawable(byte[] bytes) {
return toDrawable(toBitmap(bytes));
}
/**
* dp转换为px
*
* @param context the context
* @param dpValue the dp value
* @return int int
*/
public static int toPx(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
int pxValue = (int) (dpValue * scale + 0.5f);
// LogUtils.verbose(dpValue + " dp == " + pxValue + " px");
return pxValue;
}
/**
* To px int.
*
* @param dpValue the dp value
* @return the int
*/
public static int toPx(float dpValue) {
Resources resources = Resources.getSystem();
float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dpValue, resources.getDisplayMetrics());
return (int) px;
}
/**
* px转换为dp
*
* @param context the context
* @param pxValue the px value
* @return int int
*/
public static int toDp(Context context, float pxValue) {
final float scale = context.getResources().getDisplayMetrics().density;
int dpValue = (int) (pxValue / scale + 0.5f);
// LogUtils.verbose(pxValue + " px == " + dpValue + " dp");
return dpValue;
}
/**
* px转换为sp
*
* @param context the context
* @param pxValue the px value
* @return int int
*/
public static int toSp(Context context, float pxValue) {
final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
int spValue = (int) (pxValue / fontScale + 0.5f);
// LogUtils.verbose(pxValue + " px == " + spValue + " sp");
return spValue;
}
/**
* To gbk string.
*
* @param str the str
* @return the string
*/
public static String toGbk(String str) {
try {
return new String(str.getBytes("utf-8"), "gbk");
} catch (UnsupportedEncodingException e) {
// LogUtils.warn(e.getMessage());
return str;
}
}
/**
* To file size string string.
*
* @param fileSize the file size
* @return the string
*/
public static String toFileSizeString(long fileSize) {
DecimalFormat df = new DecimalFormat("0.00");
String fileSizeString;
if (fileSize < KB) {
fileSizeString = fileSize + "B";
} else if (fileSize < MB) {
fileSizeString = df.format((double) fileSize / KB) + "K";
} else if (fileSize < GB) {
fileSizeString = df.format((double) fileSize / MB) + "M";
} else {
fileSizeString = df.format((double) fileSize / GB) + "G";
}
return fileSizeString;
}
/**
* To string string.
*
* @param is the is
* @return the string
*/
public static String toString(InputStream is) {
StringBuilder sb = new StringBuilder();
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line);
}
is.close();
} catch (IOException e) {
// LogUtils.error(e);
}
return sb.toString();
}
/**
* To round drawable shape drawable.
*
* @param color the color
* @param radius the radius
* @return the shape drawable
*/
public static ShapeDrawable toRoundDrawable(int color, int radius) {
int r = toPx(radius);
float[] outerR = new float[]{r, r, r, r, r, r, r, r};
RoundRectShape shape = new RoundRectShape(outerR, null, null);
ShapeDrawable drawable = new ShapeDrawable(shape);
drawable.getPaint().setColor(color);
return drawable;
}
/**
* 对TextView、Button等设置不同状态时其文字颜色。
* 参见：http://blog.csdn.net/sodino/article/details/6797821
* Modified by liyujiang at 2015.08.13
*
* @param normalColor the normal color
* @param pressedColor the pressed color
* @param focusedColor the focused color
* @param unableColor the unable color
* @return the color state list
*/
public static ColorStateList toColorStateList(int normalColor, int pressedColor, int focusedColor, int unableColor) {
int[] colors = new int[]{pressedColor, focusedColor, normalColor, focusedColor, unableColor, normalColor};
int[][] states = new int[6][];
states[0] = new int[]{android.R.attr.state_pressed, android.R.attr.state_enabled};
states[1] = new int[]{android.R.attr.state_enabled, android.R.attr.state_focused};
states[2] = new int[]{android.R.attr.state_enabled};
states[3] = new int[]{android.R.attr.state_focused};
states[4] = new int[]{android.R.attr.state_window_focused};
states[5] = new int[]{};
return new ColorStateList(states, colors);
}
/**
* To color state list color state list.
*
* @param normalColor the normal color
* @param pressedColor the pressed color
* @return the color state list
*/
public static ColorStateList toColorStateList(int normalColor, int pressedColor) {
return toColorStateList(normalColor, pressedColor, pressedColor, normalColor);
}
/**
* To state list drawable state list drawable.
*
* @param normal the normal
* @param pressed the pressed
* @param focused the focused
* @param unable the unable
* @return the state list drawable
*/
public static StateListDrawable toStateListDrawable(Drawable normal, Drawable pressed, Drawable focused, Drawable unable) {
StateListDrawable drawable = new StateListDrawable();
drawable.addState(new int[]{android.R.attr.state_pressed, android.R.attr.state_enabled}, pressed);
drawable.addState(new int[]{android.R.attr.state_enabled, android.R.attr.state_focused}, focused);
drawable.addState(new int[]{android.R.attr.state_enabled}, normal);
drawable.addState(new int[]{android.R.attr.state_focused}, focused);
drawable.addState(new int[]{android.R.attr.state_window_focused}, unable);
drawable.addState(new int[]{}, normal);
return drawable;
}
/**
* To state list drawable state list drawable.
*
* @param normalColor the normal color
* @param pressedColor the pressed color
* @param focusedColor the focused color
* @param unableColor the unable color
* @return the state list drawable
*/
public static StateListDrawable toStateListDrawable(int normalColor, int pressedColor, int focusedColor, int unableColor) {
StateListDrawable drawable = new StateListDrawable();
Drawable normal = new ColorDrawable(normalColor);
Drawable pressed = new ColorDrawable(pressedColor);
Drawable focused = new ColorDrawable(focusedColor);
Drawable unable = new ColorDrawable(unableColor);
drawable.addState(new int[]{android.R.attr.state_pressed, android.R.attr.state_enabled}, pressed);
drawable.addState(new int[]{android.R.attr.state_enabled, android.R.attr.state_focused}, focused);
drawable.addState(new int[]{android.R.attr.state_enabled}, normal);
drawable.addState(new int[]{android.R.attr.state_focused}, focused);
drawable.addState(new int[]{android.R.attr.state_window_focused}, unable);
drawable.addState(new int[]{}, normal);
return drawable;
}
/**
* To state list drawable state list drawable.
*
* @param normal the normal
* @param pressed the pressed
* @return the state list drawable
*/
public static StateListDrawable toStateListDrawable(Drawable normal, Drawable pressed) {
return toStateListDrawable(normal, pressed, pressed, normal);
}
/**
* To state list drawable state list drawable.
*
* @param normalColor the normal color
* @param pressedColor the pressed color
* @return the state list drawable
*/
public static StateListDrawable toStateListDrawable(int normalColor, int pressedColor) {
return toStateListDrawable(normalColor, pressedColor, pressedColor, normalColor);
}
}
代码中的DateUtils