Android获得全局进程信息以及进程使用的内存情况

港控/mmm° 2023-10-16 21:07 15阅读 0赞

Android获得全部进程信息，并获得该进程使用的内存情况。

package zhangphil.process;
    
    import java.util.List;
    import android.os.Bundle;
    import android.os.Debug.MemoryInfo;
    import android.widget.TextView;
    import android.app.Activity;
    import android.app.ActivityManager;
    import android.app.ActivityManager.RunningAppProcessInfo;
    import android.content.Context;
    
    public class MainActivity extends Activity {
    
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    
    		TextView tv = (TextView) findViewById(R.id.textView);
    
    		ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
    
    		String all = "";
    		try {
    			List<RunningAppProcessInfo> list = activityManager
    					.getRunningAppProcesses();
    
    			for (int i = 0; i < list.size(); i++) {
    				RunningAppProcessInfo p = list.get(i);
    				
    				String info = "第 " + (i + 1) + " 个进程\n";
    				info += "名称:" + p.processName + "\n";
    				info += "id:" + p.pid + "\n";
    				info += "用户id:" + p.uid + "\n";
    				// 该进程使用的内存情况，MemoryInfo单位是KB
    				int[] memoryPid = new int[] { p.pid };
    				MemoryInfo[] memoryInfo = activityManager
    						.getProcessMemoryInfo(memoryPid);
    				// 进程内存使用情况，单位:MB
    				int memSize = memoryInfo[0].dalvikPrivateDirty;
    				String count = "";
    				if (memSize < 1024)
    					count = memSize + " KB";
    				else
    					count = memSize / 1024 + " MB";
    
    				info += "使用的内存(dalvikPrivateDirty): " + count + "\n";
    				info += "重要级:" + p.importance + "\n";
    
    				all = all + info + "\n";
    			}
    
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    
    		tv.setText(all);
    	}
    }

需要在AndroidManifest.xml添加权限：

<uses-permission android:name="android.permission.GET_TASKS" />

MainActivity.java需要的activity\_main.xml文件：