獲取Android手機CPU類型 ARM、ARMV7、NEON

1 查看手機CPU信息

cmd——adb shell——cd /proc------cat cpuinfo

2 獲取cpu的是arm指令集，armv7指令集、還是neon指令集<喎?/kf/ware/vc/" target="_blank" class="keylink">vcD4KPHA+PC9wPgo8cHJlIGNsYXNzPQ=="brush:java;"> /** * * [獲取cpu類型和架構] * * @return * 三個參數類型的數組，第一個參數標識是不是ARM架構，第二個參數標識是V6還是V7架構，第三個參數標識是不是neon指令集 */ public static Object[] getCpuArchitecture() { if ((Integer) mArmArchitecture[1] != -1) { return mArmArchitecture; } try { InputStream is = new FileInputStream("/proc/cpuinfo"); InputStreamReader ir = new InputStreamReader(is); BufferedReader br = new BufferedReader(ir); try { String nameProcessor = "Processor"; String nameFeatures = "Features"; String nameModel = "model name"; String nameCpuFamily = "cpu family"; while (true) { String line = br.readLine(); String[] pair = null; if (line == null) { break; } pair = line.split(":"); if (pair.length != 2) continue; String key = pair[0].trim(); String val = pair[1].trim(); if (key.compareTo(nameProcessor) == 0) { String n = ""; for (int i = val.indexOf("ARMv") + 4; i < val.length(); i++) { String temp = val.charAt(i) + ""; if (temp.matches("\\d")) { n += temp; } else { break; } } mArmArchitecture[0] = "ARM"; mArmArchitecture[1] = Integer.parseInt(n); continue; } if (key.compareToIgnoreCase(nameFeatures) == 0) { if (val.contains("neon")) { mArmArchitecture[2] = "neon"; } continue; } if (key.compareToIgnoreCase(nameModel) == 0) { if (val.contains("Intel")) { mArmArchitecture[0] = "INTEL"; mArmArchitecture[2] = "atom"; } continue; } if (key.compareToIgnoreCase(nameCpuFamily) == 0) { mArmArchitecture[1] = Integer.parseInt(val); continue; } } } finally { br.close(); ir.close(); is.close(); } } catch (Exception e) { e.printStackTrace(); } return mArmArchitecture; }
調用的該函數的示例方法

	/*
	 * 獲取FFpeg解碼庫的名稱(如果是插件，會涉及到一個向下兼容的問題，例如：如果當前cpu是V7neo，而又沒有neon的解碼庫，必須要做向下兼容出來
	 * ，如果有V7的庫就加載V7的庫，有V6的庫就加載V6的)
	 */
	public static String getFFmpegLibName(Context context) {
		if (LIB_FFMPEG_NAME != null) {
			return LIB_FFMPEG_NAME;
		}
		Object[] arch = getCpuArchitecture();

		String libDir = getNativeLibraryDir(context);
		String libSysDir = "/system/lib";

		if ("ARM".equals(arch[0])) {
			try {
				String ffmpeg = String.format("ffmpeg-%d%s", (Integer) arch[1], (String) arch[2]);
				if (isFileExist(libDir + "/lib" + ffmpeg + ".so") || isFileExist(libSysDir + "/lib" + ffmpeg + ".so")) {
					return ffmpeg;
				} else {
					boolean isV7NeonCpu = "neon".equals(arch[2]);
					boolean isV7 = ((Integer) arch[1]) == 7 && "".equals(arch[2]);
					boolean isV6 = ((Integer) arch[1]) == 6;
					if (isV7NeonCpu) {
						if (isFileExist(libDir + "/libffmpeg-7neon.so")
								|| isFileExist(libSysDir + "/libffmpeg-7neon.so")) {
							LIB_FFMPEG_NAME = "ffmpeg-7neon";
							return "ffmpeg-7neon";
						} else if (isFileExist(libDir + "/libffmpeg-7.so")
								|| isFileExist(libSysDir + "/libffmpeg-7.so")) {
							LIB_FFMPEG_NAME = "ffmpeg-7";
							return "ffmpeg-7";
						} else if (isFileExist(libDir + "/libffmpeg-6.so")
								|| isFileExist(libSysDir + "/libffmpeg-6.so")) {
							LIB_FFMPEG_NAME = "ffmpeg-6";
							return "ffmpeg-6";
						}
					} else if (isV7) {
						if (isFileExist(libDir + "/libffmpeg-7.so") || isFileExist(libSysDir + "/libffmpeg-7.so")) {
							LIB_FFMPEG_NAME = "ffmpeg-7";
							return "ffmpeg-7";
						} else if (isFileExist(libDir + "/libffmpeg-6.so")
								|| isFileExist(libSysDir + "/libffmpeg-6.so")) {
							LIB_FFMPEG_NAME = "ffmpeg-6";
							return "ffmpeg-6";
						}
					} else if (isV6) {
						if (isFileExist(libDir + "/libffmpeg-6.so") || isFileExist(libSysDir + "/libffmpeg-6.so")) {
							LIB_FFMPEG_NAME = "ffmpeg-6";
							return "ffmpeg-6";
						}
					}
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		} else if ("INTEL".equals(arch[0])) {
			if (isFileExist(libDir + "/libffmpeg-x86atom.so") || isFileExist(libSysDir + "/libffmpeg-x86atom.so")) {
				LIB_FFMPEG_NAME = "ffmpeg-x86atom";
				return "ffmpeg-x86atom";
			}
		}
		LIB_FFMPEG_NAME = null;
		return null;
	}