Android Open Source - android-child-lock Lock Screen Activity

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License

The source code is released under:

Apache License

Java Source Code

package com.alimuzaffar.android.childlock.activities;
/*  w ww.ja v a 2s  .  c  om*/
import java.io.FileInputStream;

import org.json.JSONObject;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager.NameNotFoundException;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.FragmentActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;

import com.alimuzaffar.android.childlock.Constants;
import com.alimuzaffar.android.childlock.R;
import com.alimuzaffar.android.childlock.services.HeartBeat;
import com.alimuzaffar.android.childlock.utils.Utils;

public class LockScreenActivity extends FragmentActivity {
  private static final String TAG = LockScreenActivity.class.getSimpleName();
  EditText pin;
  TextView pinMsg;
  String firstPin;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_lock_screen);

    getBlockedAppInfo();

    pin = (EditText) findViewById(R.id.pin);
    pinMsg = (TextView) findViewById(R.id.pinMsg);
    pin.requestFocus();

    pin.postDelayed(new Runnable() {

      @Override
      public void run() {
        // TODO Auto-generated method stub
        InputMethodManager keyboard = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        keyboard.showSoftInput(pin, 0);
      }
    }, 200);
    
    pin.addTextChangedListener(new TextWatcher() {

      @Override
      public void onTextChanged(CharSequence s, int start, int before, int count) {
      }

      @Override
      public void beforeTextChanged(CharSequence s, int start, int count, int after) {
      }

      @Override
      public void afterTextChanged(Editable s) {
        if (s.length() == 4) {
          boolean setPin = getIntent().getBooleanExtra("setPin", false);
          if (setPin) {
            if (firstPin == null) {
              firstPin = s.toString();
              pinMsg.setText("Re-enter your 4-digit PIN");
              pin.setText("");
            } else if (firstPin.equals(s.toString())) {
              // confirm pin
              Intent data = new Intent();
              data.putExtra("pin", firstPin);
              if (getParent() == null) {
                setResult(Activity.RESULT_OK, data);
              } else {
                getParent().setResult(Activity.RESULT_OK, data);
              }
              LockScreenActivity.this.finish();
            } else {
              firstPin = null;
              pin.setText(null);
              pinMsg.setText("PINs did not match. Try again, enter a 4-digit PIN.");
            }
          } else {
            checkPin(s);
          }
        } 
      }
    });
  }

  private void checkPin(Editable s) {
    String savedPin = "";
    try {
      FileInputStream istream = openFileInput(Constants.LOCKED_APP_FILE);
      String jsonStr = Utils.getStringFromInputStream(istream);
      JSONObject jo = new JSONObject(jsonStr);
      savedPin = jo.getString("pin");
    } catch (Exception e) {
      return;
    }
    
    if (s.toString().equals(savedPin)) {
      Intent i2 = new Intent();
      i2.setAction(Constants.ACTION_GRANT_ACCESS);
      i2.putExtra("packageName", getIntent().getStringExtra("packageName"));
      sendBroadcast(i2);

      new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
          LockScreenActivity.this.finish();
        }
      }, 250);
    } else {
      pin.setText(null);
      pinMsg.setText("Incorrect PIN, Please try again.");
    }
  }

  private void getBlockedAppInfo() {
    try {
      ApplicationInfo app = getPackageManager().getApplicationInfo(getIntent().getStringExtra("packageName"), 0);
      Drawable icon = getPackageManager().getApplicationIcon(app);
      CharSequence name = getPackageManager().getApplicationLabel(app);

      ((ImageView) findViewById(R.id.appIcon)).setImageDrawable(icon);
      ((TextView) findViewById(R.id.appName)).setText(name);
      ((TextView) findViewById(R.id.appName)).append(" is blocked.");

    } catch (NameNotFoundException e) {
      Log.e(TAG, e.getMessage(), e);
    }
  }

  @Override
  public void onBackPressed() {
    // Display confirmation here, finish() activity.
    Intent startMain = new Intent(Intent.ACTION_MAIN);
    startMain.addCategory(Intent.CATEGORY_HOME);
    startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(startMain);

    Intent i = new Intent(LockScreenActivity.this, HeartBeat.class);
    startService(i);

    finish();
    super.onBackPressed();
  }

}

Java Source Code List

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