Android上层怎么读写proc节点（示例）_Android

Android上层怎样读写proc节点（示例）
import android.app.Activity;import android.os.Bundle;import android.widget.CompoundButton;import android.widget.CompoundButton.OnCheckedChangeListener;import android.widget.ToggleButton;import android.os.SystemProperties;import android.util.Log;import android.widget.Toast; //wangimport java.util.Timer;import java.util.TimerTask;import android.os.PowerManager;import java.io.*; import android.os.Looper;public class DebugOptionActivity extends Activity{private static final String TAG = "tpDebug";        private int checkValue = 0;@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.debug);ToggleButton toggle = (ToggleButton)findViewById(R.id.toggle);try{File readFile = new File("proc/tp_debug/debug_switch");        FileReader inCmd = new FileReader(readFile);        try{        checkValue = inCmd.read();        if(checkValue != 0){toggle.setChecked(true);}else{toggle.setChecked(false);}}catch (IOException e){e.printStackTrace();}        } catch (FileNotFoundException e){        e.printStackTrace();        }        //ToggleButton toggle = (ToggleButton)findViewById(R.id.toggle);toggle.setOnCheckedChangeListener(new OnCheckedChangeListener(){public void onCheckedChanged(CompoundButton arg0, boolean arg1){if (arg1){//openFile awakeTimeFile = new File("proc/tp_debug/debug_switch");          FileWriter fr;          try {              fr = new FileWriter(awakeTimeFile);              fr.write("1");               fr.close();          }          catch (IOException e) {                e.printStackTrace();          }}else{//closeFile awakeTimeFile = new File("proc/tp_debug/debug_switch");          FileWriter fr;          try        {              fr = new FileWriter(awakeTimeFile);              fr.write("0");               fr.close();          } catch (IOException e) {e.printStackTrace();          }}}});}}