junlincao’s gists

junlincao / PcmWaveView.java

Created September 11, 2018 11:36

pcm voice wave view


	import android.content.Context;
	import android.graphics.Canvas;
	import android.graphics.Color;
	import android.graphics.Paint;
	import android.support.annotation.Nullable;
	import android.util.AttributeSet;
	import android.util.Log;
	import android.view.View;

junlincao / EmojiConverter.java

Last active February 26, 2018 06:57

转换utf-8 3个字节无法表示的字符

junlincao / ToastCompat.java

Last active December 4, 2017 03:47

ToastCompat, make toast shown when user disabled notification permission



	import android.app.Activity;
	import android.content.Context;
	import android.content.res.Resources;
	import android.graphics.PixelFormat;
	import android.support.annotation.StringRes;
	import android.support.v4.app.NotificationManagerCompat;
	import android.util.Log;
	import android.view.Gravity;

junlincao / gist:b82d6b1aa1cec218b0e3df2073f7acdb

Created August 18, 2017 02:54

Somthing about cursor.getText() and cursor.getDouble()

	UserCharge imoney为double类型:
	cursor.getText() 和 cursor.getDouble()效果不能保证为一致！
	getText()方法可能丢失精度，getDouble()方法结果正确


	UserCharge imoney 为 text类型:
	查询cursor.getText() 和 cursor.getDouble()效果一致！而且text类型并不影响sql对字段查询统计求和等操作

	而且由于cursor代码是系统代码无法修改，ORM 将UserCharge的imoney字段改为String 或者 BigDecimal都只是按text读取，反而用double能保证读取结果正确

junlincao / detect if bitmap is dark or light (android)

Last active April 24, 2017 03:40 — forked from brwnx/detect if bitmap is dark or light (android)

	public static boolean isDark(Bitmap bitmap) {
	final float darkThreshold = bitmap.getWidth() * bitmap.getHeight() * 0.45f;
	final int w = bitmap.getWidth();
	final int h = bitmap.getHeight();

	int darkPixels = 0;
	int[] lineColor = new int[w];
	for (int i = 0; i < h - 1; i++) {
	bitmap.getPixels(lineColor, 0, w, 0, i, w, 1);
	for (int color : lineColor) {

junlincao / logUtil.java

Created December 30, 2015 09:16

android logUtil

	public class LogUtil {
	private boolean debug;
	private String tag;

	private static final String LOG_FILE_NAME = "jz.log";

	public LogUtil() {
	this(null);
	}

junlincao / gist:5065b0d36997d95f4635

Created December 15, 2015 16:49

okhttp Interceptor 中为post等body添加额外字段（MultipartRequestBody 可能有问题，未测试）

	client.interceptors().add(new Interceptor() {
	@Override
	public Response intercept(Chain chain) throws IOException {
	final Request request = chain.request();

	if (!HttpMethod.requiresRequestBody(request.method())) {
	return chain.proceed(request);
	}

	final RequestBody newRb = new FormEncodingBuilder()

junlincao / ripple_drawable.txt

Created November 23, 2015 09:37

android 5.0 ripple 写法

	写ripple drawable时候，如果默认背景带透明度，则item加一个id="@android:id/mask"，以保证边界：
	<ripple xmlns:android="http://schemas.android.com/apk/res/android"
	android:color="?android:colorControlHighlight">

	<item android:id="@android:id/mask">
	<shape>
	<corners android:radius="4dp" />
	<solid android:color="@color/white" />
	</shape>
	</item>

junlincao / exitapp.java

Created October 15, 2015 09:36

exit app

	int currentVersion = android.os.Build.VERSION.SDK_INT;
	if (currentVersion > android.os.Build.VERSION_CODES.ECLAIR_MR1) {
	Intent startMain = new Intent(Intent.ACTION_MAIN);
	startMain.addCategory(Intent.CATEGORY_HOME);
	startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
	startActivity(startMain);
	System.exit(0);
	} else {// android2.1
	ActivityManager am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
	am.restartPackage(getPackageName());

junlincao / DayTime.java

Created October 14, 2015 09:44

根据经纬度计算日出与日落时间

	/**
	* 根据经纬度计算日出日落时间
	* @param lat 纬度
	* @param lng 经度
	* @param isSunRise true计算日出，false计算日落
	* @return int[] 0位置为小时，1位置为分钟
	*/
	public static int[] getDayTime(double lat, double lng, boolean isSunRise){
	lat = Math.toRadians(lat);