package com.john.wifipwd;import android.os.Build;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Looper;
import android.os.Message;import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;public class RootCommand {public interface OnCommandCallback {void onCommandResult(List<String> cmds, String result);void onCommandErrorResult(List<String> cmds, String errorMsg);}public static final int MESSAGE_COMMAND = 1001;private HandlerThread mHandlerThread;private WorkerHandler mWorkerHandler;private Handler mUIHandler;private OnCommandCallback mOnCommandCallback;public RootCommand() {this(null, null);}public RootCommand(OnCommandCallback callback) {this(null, callback);}public RootCommand(Handler handler, OnCommandCallback callback) {mUIHandler = handler;mOnCommandCallback = callback;mHandlerThread = new HandlerThread("su-Thread");mHandlerThread.start();mWorkerHandler = new WorkerHandler(mHandlerThread.getLooper());}public void addCommand(String cmd) {if (cmd != null) {ArrayList<String> obj = new ArrayList<>();obj.add(cmd);Message msg = Message.obtain();msg.what = MESSAGE_COMMAND;msg.obj = obj;mWorkerHandler.sendMessage(msg);}}public void addCommands(List<String> cmds) {if (cmds != null) {ArrayList<String> obj = new ArrayList<>();obj.addAll(cmds);Message msg = Message.obtain();msg.what = MESSAGE_COMMAND;msg.obj = obj;mWorkerHandler.sendMessage(msg);}}public void quit() {mWorkerHandler.removeMessages(MESSAGE_COMMAND);mWorkerHandler.quit();if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {mHandlerThread.quitSafely();} else {mHandlerThread.quit();}}private class WorkerHandler extends Handler {private boolean mIsQuit;public WorkerHandler(Looper looper) {super(looper);}public void quit() {mIsQuit = true;}@Override@SuppressWarnings("unchecked")public void handleMessage(Message msg) {super.handleMessage(msg);switch (msg.what) {case MESSAGE_COMMAND: {List<String> cmds = (List<String>) msg.obj;String line;StringBuilder result = new StringBuilder();boolean isError = false;Process process = null;BufferedReader error = null;BufferedReader reader = null;BufferedWriter writer = null;try {process = Runtime.getRuntime().exec("su root");writer = new BufferedWriter(new OutputStreamWriter(process.getOutputStream()));error = new BufferedReader(new InputStreamReader(process.getErrorStream()));reader = new BufferedReader(new InputStreamReader(process.getInputStream()));Dlog.d("--> call write");for (String command : cmds) {Dlog.d("handle message:" + command);writer.write(command + " \n");}writer.write("exit \n");writer.flush();process.waitFor();Dlog.d("--> error read");while (!mIsQuit && (line = error.readLine()) != null) {result.append(line).append("\n");isError = true;}Dlog.d("--> isError = " + isError);if (!isError) {Dlog.d("--> Reader read");while (!mIsQuit && (line = reader.readLine()) != null) {result.append(line).append("\n");}}if (!mIsQuit) {if (!isError) {if (mUIHandler != null) {mUIHandler.post(new ResultRunnable(cmds, result.toString()));} else if (mOnCommandCallback != null) {mOnCommandCallback.onCommandResult(cmds, result.toString());}} else {if (mUIHandler != null) {mUIHandler.post(new ErrorResultRunnable(cmds, result.toString()));} else if (mOnCommandCallback != null) {mOnCommandCallback.onCommandErrorResult(cmds, result.toString());}}}Dlog.d("handle message end!");} catch (Exception e) {Dlog.e("", e);} finally {close(writer);close(error);close(reader);if (process != null) {process.destroy();}}break;}default:break;}}private void close(Closeable stream) {try {if (stream != null) {stream.close();}} catch (IOException e) {Dlog.e("", e);}}}private class ResultRunnable implements Runnable {private String mResult;private List<String> mCmds;public ResultRunnable(List<String> cmds, String result) {mCmds = cmds;mResult = result;}@Overridepublic void run() {if (mOnCommandCallback != null) {mOnCommandCallback.onCommandResult(mCmds, mResult);}}}private class ErrorResultRunnable implements Runnable {private String mResult;private List<String> mCmds;public ErrorResultRunnable(List<String> cmds, String result) {mCmds = cmds;mResult = result;}@Overridepublic void run() {if (mOnCommandCallback != null) {mOnCommandCallback.onCommandErrorResult(mCmds, mResult);}}}
}

package com.john.wifipwd;import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;public class WiFiAcy extends AppCompatActivity implements RootCommand.OnCommandCallback {private RootCommand mRootCommand;private ArrayList<String> mCmds = new ArrayList<>();private List<WpaInfo> mWpaInfos = new ArrayList<>();@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.wpa_pwd_acy);mRootCommand = new RootCommand(new Handler(), this);sendCmd("cat /data/misc/wifi/wpa_supplicant.conf");}@Overrideprotected void onDestroy() {super.onDestroy();mRootCommand.quit();}@Overridepublic void onCommandResult(List<String> cmds, String result) {Dlog.d("[onCommandResult]");if (cmds != null && cmds.equals(mCmds)) {for (String cmd : cmds) {Dlog.d("--> " + cmd);}Dlog.d("" + result);if (result != null) {mWpaInfos.clear();parseWpa(mWpaInfos, result);createNetWorkViews();}}}@Overridepublic void onCommandErrorResult(List<String> cmds, String errorMsg) {Dlog.d("[onCommandErrorResult]");if (cmds != null && cmds.equals(mCmds)) {for (String cmd : cmds) {Dlog.d("--> " + cmd);}Dlog.d("" + errorMsg);}Toast.makeText(this, errorMsg, Toast.LENGTH_LONG).show();}private void sendCmd(String cmd) {mCmds.clear();mCmds.add(cmd);mRootCommand.addCommands(mCmds);}private void createNetWorkViews() {LayoutInflater localLayoutInflater = getLayoutInflater();ViewGroup localViewGroup = (ViewGroup) findViewById(R.id.ll_wifi_pwds);if (localViewGroup == null)return;localViewGroup.removeAllViews();Iterator localIterator = mWpaInfos.iterator();TextView textView;while (true) {if (!localIterator.hasNext())return;WpaInfo localNetWorkInfo = (WpaInfo) localIterator.next();Dlog.d(localNetWorkInfo.toString());View localView = localLayoutInflater.inflate(R.layout.wpa_pwd_item, localViewGroup, false);textView = (TextView) localView.findViewById(R.id.ssid);textView.setText(getString(R.string.ssid_tag) + localNetWorkInfo.getSsid());textView = (TextView) localView.findViewById(R.id.psk);textView.setText(getString(R.string.psk_tag) + localNetWorkInfo.getPsk());textView = (TextView) localView.findViewById(R.id.keyMgmt);textView.setText(getString(R.string.keyMgmt_tag) + localNetWorkInfo.getKeyMgmt());textView = (TextView) localView.findViewById(R.id.priority);textView.setText(getString(R.string.priority_tag) + localNetWorkInfo.getPriority());localViewGroup.addView(localView);}}private void parseWpa(List<WpaInfo> outList, String content) {String[] array = content.split("\n");WpaInfo wpaInfo = null;for (String line : array) {line = line.trim();if (line.startsWith(WpaInfo.NETWORK_PREFIX)) {wpaInfo = new WpaInfo();outList.add(wpaInfo);} else if (wpaInfo != null) {if (line.startsWith(WpaInfo.SSID_PREFIX)) {line = line.substring(WpaInfo.SSID_PREFIX.length());line = line.replaceAll("\"", "");wpaInfo.setSsid(line);} else if (line.startsWith(WpaInfo.PSK_PREFIX)) {line = line.substring(WpaInfo.PSK_PREFIX.length());line = line.replaceAll("\"", "");wpaInfo.setPsk(line);} else if (line.startsWith(WpaInfo.KEY_MGMT_PREFIX)) {line = line.substring(WpaInfo.KEY_MGMT_PREFIX.length());wpaInfo.setKeyMgmt(line);} else if (line.startsWith(WpaInfo.PRIORITY_PREFIX)) {line = line.substring(WpaInfo.PRIORITY_PREFIX.length());wpaInfo.setPriority(line);Dlog.d("" + wpaInfo);}}}}
}

package com.john.wifipwd;public class WpaInfo {public static final String NETWORK_PREFIX = "network={";public static final String SSID_PREFIX = "ssid=";public static final String PSK_PREFIX = "psk=";public static final String KEY_MGMT_PREFIX = "key_mgmt=";public static final String PRIORITY_PREFIX = "priority=";private String ssid;private String psk;private String keyMgmt;private String priority;public WpaInfo() {}public WpaInfo(String ssid, String psk, String keyMgmt, String priority) {this.ssid = ssid;this.psk = psk;this.keyMgmt = keyMgmt;this.priority = priority;}public String getSsid() {return ssid;}public void setSsid(String ssid) {this.ssid = ssid;}public String getPsk() {return psk;}public void setPsk(String psk) {this.psk = psk;}public String getKeyMgmt() {return keyMgmt;}public void setKeyMgmt(String keyMgmt) {this.keyMgmt = keyMgmt;}public String getPriority() {return priority;}public void setPriority(String priority) {this.priority = priority;}@Overridepublic boolean equals(Object o) {if (this == o)return true;if (o == null || getClass() != o.getClass())return false;WpaInfo wpaInfo = (WpaInfo) o;if (ssid != null ? !ssid.equals(wpaInfo.ssid) : wpaInfo.ssid != null)return false;if (psk != null ? !psk.equals(wpaInfo.psk) : wpaInfo.psk != null)return false;if (keyMgmt != null ? !keyMgmt.equals(wpaInfo.keyMgmt) : wpaInfo.keyMgmt != null)return false;return priority != null ? priority.equals(wpaInfo.priority) : wpaInfo.priority == null;}@Overridepublic int hashCode() {int result = ssid != null ? ssid.hashCode() : 0;result = 31 * result + (psk != null ? psk.hashCode() : 0);result = 31 * result + (keyMgmt != null ? keyMgmt.hashCode() : 0);result = 31 * result + (priority != null ? priority.hashCode() : 0);return result;}@Overridepublic String toString() {return "WpaInfo{" +"ssid='" + ssid + '\'' +", psk='" + psk + '\'' +", keyMgmt='" + keyMgmt + '\'' +", priority='" + priority + '\'' +'}';}
}