HeapDump生成

heap dump是一个程序heap的快照,可以获知程序那些部分正在使用大部分的内存.
对于Android执行android.os.Debug.dumpHprofData(hprofPath)生成程序的dump

fun createDumpFile(): Boolean {
        val LOG_PATH = "/dump.gc/"
        var bool = false
        val sdf = SimpleDateFormat("yyyy-MM-dd_HH.mm.ssss", Locale.getDefault())
        val createTime = sdf.format(Date(System.currentTimeMillis()))
        val state = android.os.Environment.getExternalStorageState()

        // 判断SdCard是否存在并且是可用的
        if (android.os.Environment.MEDIA_MOUNTED == state) {
            val file = File(Environment.getExternalStorageDirectory().getPath() + LOG_PATH)
            if (!file.exists()) {
                file.mkdirs()
            }

            var hprofPath = file.absolutePath
            if (!hprofPath.endsWith("/")) {
                hprofPath += "/"
            }

            hprofPath += "$createTime.hprof"
            try {
                android.os.Debug.dumpHprofData(hprofPath)
                bool = true
                XLog.e("create dumpfile done!--path:$hprofPath")
            } catch (e: IOException) {
                e.printStackTrace()
            }

        } else {
            bool = false
            XLog.e("no sdcard!")
        }

        return bool
    }