1 檢視手機CPU資訊

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

	/**
	 * 
	 * [獲取cpu型別和架構]
	 * 
	 * @return 
	 * 三個引數型別的陣列，第一個引數標識是不是ARM架構，第二個引數標識是V6還是V7架構，第三個引數標識是不是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;
	}
 

	/*
	 * 獲取FFpeg解碼庫的名稱(如果是外掛，會涉及到一個向下相容的問題，例如：如果當前cpu是V7neo，而又沒有neon的解碼庫，必須要做向下相容出來
	 * ，如果有V7的庫就載入V7的庫，有V6的庫就載入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;
	}