查询Android设备硬解码能力
/system/etc/media_codecs.xml /system/etc/media_profiles.xml
Build WebRTC
First of All, You have evaded the “WALL”. God bless you. Host OS: Ubuntu 16.04 LTE Build Tools git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git Then add depot_tools to your PATH Checkout Source Set the target OS Here, I will build webrtc for Andorid platform. export GYP_DEFINES=”OS=android” Sync Source mkdir webrtc_android cd webrtc_android fetch […]
Android:Get Certificate SHA1 with JNI
#include <assert.h> #include <string.h> #include <stdio.h> #include <android/log.h> const char HexCode[]={‘0′,’1′,’2′,’3′,’4′,’5′,’6′,’7′,’8′,’9′,’A’,’B’,’C’,’D’,’E’,’F’}; static void byte_array_to_hex_string(JNIEnv *env, const jbyteArray array, const jsize array_size, char *hex_string) { jbyte *sha1 = (*env)->GetByteArrayElements(env, array, NULL); for (int i = 0; i < array_size; i++) { hex_string[i * 2] = HexCode[((unsigned char)sha1[i]) / 16]; hex_string[i * […]
Android:Get Certificate SHA1 with JAVA
public static String byte2HexFormatted(byte[] arr) { StringBuilder str = new StringBuilder(arr.length * 2); for (int i = 0; i < arr.length; i++) { String h = Integer.toHexString(arr[i]); int l = h.length(); if (l == 1) h = "0" + h; if (l > 2) h = h.substring(l – 2, l); […]
Android: Get Certificate SHA1 with keytool
keytool -list -keystore testkey.jks
Android Studio: Change AAR Build Name
android.libraryVariants.all { variant -> variant.outputs.each { output -> def outputFile = output.outputFile if (outputFile != null && outputFile.name.endsWith(‘.aar’)) { def fileName = “Your aar package name” output.outputFile = new File(outputFile.parent, fileName) } } } Rebuild your project, you will find the aar package file at build/outputs/aar
Android:使用Zxing创建二维码
public final class genQrCode { private static final int BLACK = 0xff000000; public static Bitmap createQRCode(String str,int widthAndHeight) throws WriterException { Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>(); hints.put(EncodeHintType.CHARACTER_SET, “utf-8”); BitMatrix matrix = new MultiFormatWriter().encode(str, BarcodeFormat.QR_CODE, widthAndHeight, widthAndHeight); int width = matrix.getWidth(); int height = matrix.getHeight(); int[] pixels = new […]
Android:使用StaticLayout实现字符串换行
static class LongTextView extends View { private static final float TEXT_SIZE = 60; private static final CharSequence TEXT = “This is a long long long ” + “long long long long long long long long long long ” + “long long long string”; TextPaint textPaint; public LongTextView(Context context) { super(context); […]
Android: Check Long Press Helper
基本思想： 在Down事件中向UI线程塞入一个定时任务，如果在定时时间终了前任务没有被取消，就认为是一个长按事件。 /* * Copyright (C) 2012 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the “License”); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * […]
Android NDK: Use wildcard in Android.mk
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := Hello LOCAL_SRC_FILES := $(wildcard $(LOCAL_PATH)/*.c) include $(BUILD_STATIC_LIBRARY)