import android.app.Activity;

import android.content.Context;

import android.content.Intent;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.net.Uri;

import android.os.Environment;

import android.util.DisplayMetrics;

import android.view.WindowManager;

import android.view.inputmethod.InputMethodManager;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;

import java.text.DecimalFormat;

public class AppUtils {

/**

* 关闭键盘

*

* @param activity Activity

*/

public static void hideSoftInput(Activity activity) {

if (activity.getCurrentFocus() != null)

((InputMethodManager) activity

.getSystemService(Context.INPUT_METHOD_SERVICE))

.hideSoftInputFromWindow(activity.getCurrentFocus()

.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);

}

/**

* 指定小数输出

*

* @param s 输入

* @param format 小数格式，比如保留两位0.00

* @return 输出结果

*/

public static String decimalFormat(String s, String format) {

DecimalFormat decimalFormat = new DecimalFormat(format);

return decimalFormat.format(s);

}

/**

* FilePath To Bitmap

*

* @param context 上下文

* @param filePath 文件路径

*/

public static Bitmap getBitmapFromFilePath(Context context, String filePath) {

BitmapFactory.Options options = new BitmapFactory.Options();

options.inJustDecodeBounds = true;

int bmpWidth = options.outWidth;

int bmpHeight = options.outHeight;

WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);

DisplayMetrics metrics = new DisplayMetrics();

windowManager.getDefaultDisplay().getMetrics(metrics);

int screenWidth = metrics.widthPixels;

int screenHeight = metrics.heightPixels;

options.inSampleSize = 1;

if (bmpWidth > bmpHeight) {

if (bmpWidth > screenWidth)

options.inSampleSize = bmpWidth / screenWidth;

} else {

if (bmpHeight > screenHeight)

options.inSampleSize = bmpHeight / screenHeight;

}

options.inJustDecodeBounds = false;

return BitmapFactory.decodeFile(filePath, options);

}

/**

* Bitmap to File

*

* @param bitmap

*/

public static String bitmap2File(Bitmap bitmap) {

File outDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);

if (!outDir.exists()) {

outDir.mkdirs();

}

File outFile = new File(outDir, System.currentTimeMillis() + ".jpg");

try {

FileOutputStream fileOutputStream = new FileOutputStream(outFile);

bitmap.compress(Bitmap.CompressFormat.JPEG, 40, fileOutputStream);

fileOutputStream.flush();

fileOutputStream.close();

} catch (Exception e) {

e.printStackTrace();

}

return outFile.getAbsolutePath();

}

/**

* 把Bitmap转Byte

*/

public static byte[] bitmap2Bytes(Bitmap bitmap) {

ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream);

return byteArrayOutputStream.toByteArray();

}

/**

* MD5加密

*

* @param plainText 需要加密的字符串

* @return 加密后字符串

*/

public static String md5(String plainText) {

String result = "";

try {

MessageDigest md = MessageDigest.getInstance("MD5");

md.update(plainText.getBytes());

byte b[] = md.digest();

int i;

StringBuffer buf = new StringBuffer("");

for (int offset = 0; offset < b.length; offset++) {

i = b[offset];

if (i < 0)

i += 256;

if (i < 16)

buf.append("0");

buf.append(Integer.toHexString(i));

}

result = buf.toString().toLowerCase();// 32位的加密（转成小写）

buf.toString().substring(8, 24);// 16位的加密

} catch (NoSuchAlgorithmException e) {

e.printStackTrace();

}

return result;

}

/**

* 安装apk

*

* @param context 上下文

* @param path 文件路劲

*/

public static void installAPK(Context context, String path) {

Intent intent = new Intent();

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

intent.setAction(android.content.Intent.ACTION_VIEW);

intent.setDataAndType(Uri.fromFile(new File(path)), "application/vnd.android.package-archive");

context.startActivity(intent);

}

/**

* 直接拨号，需要增加CALL_PHONE权限

*

* @param context 上下文

* @param phone 手机号码

*/

public static void actionCall(Context context, String phone) {

Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + phone));

intent.setAction(Intent.ACTION_CALL);// 直接拨号

context.startActivity(intent);

}

/**

* 跳到拨号盘-拨打电话

*

* @param context 上下文

* @param phone 手机号码

*/

public static void actionDial(Context context, String phone) {

Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + phone));

intent.setAction(Intent.ACTION_DIAL);// 拨号盘

context.startActivity(intent);

}

}