在Android中获取内存使用情况
package com.infostretch.mainactivity;import java.io.BufferedReader;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStreamReader;public class CPULoad { long total = 0; long idle = 0; float usage = 0; public CPULoad() { readUsage(); } public float getUsage() { readUsage(); return usage; } private void readUsage() { try { BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream("/proc/stat")), 1000); String load = reader.readLine(); reader.close(); String[] toks = load.split(" "); long currTotal = Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[4]); long currIdle = Long.parseLong(toks[5]); this.usage = (currTotal - total) * 100.0f / (currTotal - total + currIdle - idle); this.total = currTotal; this.idle = currIdle; } catch(IOException ex) { ex.printStackTrace(); } }}
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