最近在一个视频项目中遇到了很多屏幕锁定的问题,自己也在学习,网上找了下也没太详细的例子,看的资料书上也没有有关屏幕锁定程序的介绍,从之前写的文章中抽过来放研究院中,希望能帮助更多想了解或学习屏幕锁的朋友们学习研究,自己照着官方文档学习下,现在做好了,废话不多说,先发下截图,看下效果,需要注意的地方会加注释,有问题的朋友可以直接留言,我们共同学习交流,共同提高进步!直接看效果图:
一:未设置密码时进入系统设置的效果图如下:
二:运行DEMO,进入应用时:
三:设置密码方式预览:
四:只设置密码保护时的效果图
五:密码解密效果图
六:设置九宫格加密时的效果图
七:九宫格解密时的效果图
八:解密成功后,进入我们手机系统的图
下面来简单的看下源码吧,此处讲下,这个小DEMO也是临时学习下的,有讲的不明白的地方请朋友直接批评指出,有错肯定改的,吼吼..看代码:
主控制类:
Java代码
- package com.xiaoma.policymanager.demo;
-
- import android.app.Activity;
- import android.app.admin.DevicePolicyManager;
- import android.content.Intent;
- mport android.content.SharedPreferences;
- import android.os.Bundle;
- import android.view.View;
- import android.widget.AdapterView;
- import android.widget.ArrayAdapter;
- import android.widget.Button;
- import android.widget.EditText;
- import android.widget.LinearLayout;
- mport android.widget.Spinner;
- import android.widget.TextView;
-
-
-
-
-
-
-
- public class PolicySetupActivity extends Activity {
- private static final int REQ_ACTIVATE_DEVICE_ADMIN = 10;
- private static final String SCREEN_ID_KEY = "LAYOUT_ID";
-
-
- private static final String APP_PREF = "APP_PREF";
-
- private static final int UNKNOWN_SCREEN_ID = -1;
-
-
- private Spinner mPasswordQualityInputField;
- private EditText mPasswordLengthInputField;
- private EditText mPasswordMinUppercaseInputField;
-
-
- private Policy mPolicy;
-
- private int mCurrentScreenId;
-
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- mPolicy = new Policy(this);
- }
-
- @Override
- protected void onResume() {
- super.onResume();
-
- SharedPreferences prefs = getSharedPreferences(APP_PREF, MODE_PRIVATE);
- final int savedScreenId = prefs.getInt(SCREEN_ID_KEY, UNKNOWN_SCREEN_ID);
-
- if (savedScreenId == UNKNOWN_SCREEN_ID || !mPolicy.isAdminActive()) {
- setScreenContent(R.layout.activity_policy_setup);
-
- } else {
- setScreenContent(savedScreenId);
- }
- }
-
-
-
-
-
-
- private void setScreenContent(final int screenId) {
-
- mCurrentScreenId = screenId;
- setContentView(mCurrentScreenId);
- getSharedPreferences(APP_PREF, MODE_PRIVATE).edit().putInt(
- SCREEN_ID_KEY, mCurrentScreenId).commit();
- switch (mCurrentScreenId) {
- case R.layout.activity_policy_setup:
- initPolicySetupScreen();
- initNavigation();
- break;
- case R.layout.activity_view_policy:
- initViewPolicyScreen();
- initNavigation();
- break;
- }
- }
-
-
-
-
- @Override
- protected void onPause() {
- super.onPause();
- if (mCurrentScreenId == R.layout.activity_policy_setup) writePolicy();
- }
-
- @Override
- protected void onActivityResult(int requestCode, int resultCode, Intent data) {
- if (requestCode == REQ_ACTIVATE_DEVICE_ADMIN && resultCode == RESULT_OK) {
-
- setScreenContent(mCurrentScreenId);
- } else {
- super.onActivityResult(requestCode, resultCode, data);
- }
- }
-
-
-
-
- @Override
- public void onBackPressed() {
- if (mCurrentScreenId == R.layout.activity_view_policy) {
- setScreenContent(R.layout.activity_policy_setup);
- return;
- }
- super.onBackPressed();
- }
-
-
-
-
- private void initPolicySetupScreen() {
- mPasswordQualityInputField = (Spinner) findViewById(R.id.policy_password_quality);
- mPasswordLengthInputField = (EditText) findViewById(R.id.policy_password_length);
- mPasswordMinUppercaseInputField = (EditText) findViewById(R.id.policy_password_uppercase);
- ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
- R.array.password_types, android.R.layout.simple_spinner_item);
- adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
- mPasswordQualityInputField.setAdapter(adapter);
- mPasswordQualityInputField.setOnItemSelectedListener(
- new AdapterView.OnItemSelectedListener() {
- public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
- LinearLayout passwordMinUppercaseView =
- (LinearLayout) findViewById(R.id.password_uppercase_view);
-
-
- if (pos > 2)
- passwordMinUppercaseView.setVisibility(View.VISIBLE);
- else
- passwordMinUppercaseView.setVisibility(View.GONE);
- }
-
- public void onNothingSelected(AdapterView<?> parent) {}
- });
-
-
- mPolicy.readFromLocal();
- mPasswordQualityInputField.setSelection(mPolicy.getPasswordQuality());
- if (mPolicy.getPasswordLength() > 0) {
- mPasswordLengthInputField.setText(String.valueOf(mPolicy.getPasswordLength()));
- } else {
- mPasswordLengthInputField.setText("");
- }
-
- if (mPolicy.getPasswordMinUpperCase() > 0) {
- mPasswordMinUppercaseInputField.setText(
- String.valueOf(mPolicy.getPasswordMinUpperCase()));
- } else {
- mPasswordMinUppercaseInputField.setText("");
- }
- }
-
-
-
-
- private void initViewPolicyScreen() {
- TextView passwordQualityView = (TextView) findViewById(R.id.policy_password_quality);
- TextView passwordLengthView = (TextView) findViewById(R.id.policy_password_length);
-
-
- mPolicy.readFromLocal();
- int passwordQualitySelection = mPolicy.getPasswordQuality();
- passwordQualityView.setText(
- getResources().getStringArray(R.array.password_types)[passwordQualitySelection]);
- passwordLengthView.setText(String.valueOf(mPolicy.getPasswordLength()));
- if (passwordQualitySelection > 2) {
- LinearLayout passwordMinUppercaseView =
- (LinearLayout) findViewById(R.id.password_uppercase_view);
- passwordMinUppercaseView.setVisibility(View.VISIBLE);
- ((TextView) findViewById(R.id.policy_password_uppercase)).setText(
- String.valueOf(mPolicy.getPasswordMinUpperCase()));
- }
- }
-
-
-
-
- private void initNavigation() {
- if (!mPolicy.isAdminActive()) {
-
- setupNavigation(R.string.setup_message_activate,
- R.string.setup_action_activate,
- mActivateButtonListener);
- } else if (mCurrentScreenId == R.layout.activity_policy_setup) {
- setupNavigation(R.string.setup_message_set_policy,
- R.string.setup_action_set_policy,
- new View.OnClickListener() {
- public void onClick(View view) {
- writePolicy();
- mPolicy.configurePolicy();
- setScreenContent(R.layout.activity_view_policy);
- }
- });
- }
- else if (!mPolicy.isActivePasswordSufficient()) {
-
- setupNavigation(R.string.setup_message_enforce_policy,
- R.string.setup_action_enforce_policy,
- mEnforcePolicyListener);
- } else {
-
- setupNavigation(R.string.setup_message_go_secured,
- R.string.setup_action_go_secured,
- new View.OnClickListener() {
- public void onClick(View view) {
- startActivity(new Intent(view.getContext(), SecureActivity.class));
- }
- });
- }
- }
-
-
-
-
- private View.OnClickListener mActivateButtonListener = new View.OnClickListener() {
- @Override
- public void onClick(View v) {
-
-
- writePolicy();
- Intent activateDeviceAdminIntent =
- new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
- activateDeviceAdminIntent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN,
- mPolicy.getPolicyAdmin());
-
-
-
- activateDeviceAdminIntent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION,
- getResources().getString(R.string.device_admin_activation_message));
- startActivityForResult(activateDeviceAdminIntent, REQ_ACTIVATE_DEVICE_ADMIN);
- }
- };
-
-
-
-
- private View.OnClickListener mEnforcePolicyListener = new View.OnClickListener() {
- @Override
- public void onClick(View v) {
- writePolicy();
-
-
-
-
- Intent intent = new Intent(DevicePolicyManager.ACTION_SET_NEW_PASSWORD);
- startActivity(intent);
- }
- };
-
-
-
-
-
-
-
- private void setupNavigation(int messageResId, int buttonTextResId,
- View.OnClickListener listener) {
- TextView setupMessage = (TextView) findViewById(R.id.setup_message);
- setupMessage.setText(messageResId);
- Button actionBtn = (Button) findViewById(R.id.setup_action_btn);
- actionBtn.setText(buttonTextResId);
- actionBtn.setOnClickListener(listener);
- }
-
-
- private void writePolicy() {
- int passwordQuality = (int) mPasswordQualityInputField.getSelectedItemId();
-
- int passwordLength = 0;
- try {
- passwordLength = Integer.valueOf(mPasswordLengthInputField.getText().toString());
- } catch (NumberFormatException nfe) {}
-
- int passwordMinUppercase = 0;
- try {
- passwordMinUppercase =
- Integer.valueOf(mPasswordMinUppercaseInputField.getText().toString());
- } catch (NumberFormatException nfe) {}
-
- mPolicy.saveToLocal(passwordQuality, passwordLength, passwordMinUppercase);
- }
- }
配置操作类:
Java代码
- package com.xiaoma.policymanager.demo;
-
- import android.app.Activity;
- import android.app.admin.DeviceAdminReceiver;
- import android.app.admin.DevicePolicyManager;
- import android.content.ComponentName;
- import android.content.Context;
- import android.content.Intent;
- import android.content.SharedPreferences;
- import android.os.Build;
-
-
-
-
-
-
-
- public class Policy {
- public static final int REQUEST_ADD_DEVICE_ADMIN = 1;
-
-
- private static final String APP_PREF = "APP_PREF";
-
- private static final String KEY_PASSWORD_LENGTH = "PW_LENGTH";
- private static final String KEY_PASSWORD_QUALITY = "PW_QUALITY";
- private static final String KEY_PASSWORD_MIN_UPPERCASE = "PW_MIN_UPPERCASE";
-
-
-
-
- final static int[] PASSWORD_QUALITY_VALUES = new int[] {
- DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED,
- DevicePolicyManager.PASSWORD_QUALITY_SOMETHING,
- DevicePolicyManager.PASSWORD_QUALITY_NUMERIC,
- DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC,
- DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC,
- DevicePolicyManager.PASSWORD_QUALITY_COMPLEX
- };
-
- private int mPasswordQuality;
- private int mPasswordLength;
- private int mPasswordMinUpperCase;
- private Context mContext;
- private DevicePolicyManager mDPM;
- private ComponentName mPolicyAdmin;
-
-
-
-
-
- public Policy(Context context) {
- mContext = context;
- mPasswordQuality = -1;
- mPasswordLength = 0;
- mPasswordMinUpperCase = 0;
- mDPM = (DevicePolicyManager) context.getSystemService(Context.DEVICE_POLICY_SERVICE);
- mPolicyAdmin = new ComponentName(context, PolicyAdmin.class);
- }
-
-
-
-
- public void saveToLocal(int passwordQuality, int passwordLength, int passwordMinUppercase) {
- SharedPreferences.Editor editor =
- mContext.getSharedPreferences(APP_PREF, Context.MODE_PRIVATE).edit();
- if (mPasswordQuality != passwordQuality) {
- editor.putInt(KEY_PASSWORD_QUALITY, passwordQuality);
- mPasswordQuality = passwordQuality;
- }
- if (mPasswordLength != passwordLength) {
- editor.putInt(KEY_PASSWORD_LENGTH, passwordLength);
- mPasswordLength = passwordLength;
- }
- if (mPasswordMinUpperCase != passwordMinUppercase) {
- editor.putInt(KEY_PASSWORD_MIN_UPPERCASE, passwordMinUppercase);
- mPasswordMinUpperCase = passwordMinUppercase;
- }
- editor.commit();
- }
-
-
-
-
- public void readFromLocal() {
- SharedPreferences prefs = mContext.getSharedPreferences(APP_PREF, Context.MODE_PRIVATE);
- mPasswordQuality = prefs.getInt(KEY_PASSWORD_QUALITY, -1);
- mPasswordLength = prefs.getInt(KEY_PASSWORD_LENGTH, -1);
- mPasswordMinUpperCase = prefs.getInt(KEY_PASSWORD_MIN_UPPERCASE, -1);
- }
-
-
-
-
-
-
- public int getPasswordQuality() { return mPasswordQuality; }
-
-
-
-
-
-
- public int getPasswordLength() { return mPasswordLength; }
-
-
-
-
-
-
- public int getPasswordMinUpperCase() { return mPasswordMinUpperCase; }
-
-
-
-
-
-
- public ComponentName getPolicyAdmin() { return mPolicyAdmin; }
-
-
-
-
-
-
- public boolean isAdminActive() {
- return mDPM.isAdminActive(mPolicyAdmin);
- }
-
- public boolean isActivePasswordSufficient() {
- return mDPM.isActivePasswordSufficient();
- }
-
-
-
-
-
- public boolean isDeviceSecured() {
- return isAdminActive() && isActivePasswordSufficient();
- }
-
-
-
-
- public void configurePolicy() {
- mDPM.setPasswordQuality(mPolicyAdmin, PASSWORD_QUALITY_VALUES[mPasswordQuality]);
- mDPM.setPasswordMinimumLength(mPolicyAdmin, mPasswordLength);
- if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
- mDPM.setPasswordMinimumUpperCase(mPolicyAdmin, mPasswordMinUpperCase);
- }
- }
-
-
-
-
- public static class PolicyAdmin extends DeviceAdminReceiver {
-
- @Override
- public void onDisabled(Context context, Intent intent) {
-
- super.onDisabled(context, intent);
- SharedPreferences prefs = context.getSharedPreferences(APP_PREF, Activity.MODE_PRIVATE);
-
- prefs.edit().clear().commit();
- }
- }
- }
权限验证类:
Java代码
- package com.xiaoma.policymanager.demo;
-
- import android.app.Activity;
- import android.content.Intent;
-
-
-
-
-
-
-
- public class SecureActivity extends Activity {
-
- @Override
- protected void onResume() {
- super.onResume();
-
-
- Policy policy = new Policy(this);
- policy.readFromLocal();
- if (!policy.isDeviceSecured()) {
- Intent intent = new Intent();
- intent.setClass(this, PolicySetupActivity.class);
- intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP |
- Intent.FLAG_ACTIVITY_CLEAR_TASK);
- startActivity(intent);
- finish();
- }
- setContentView(R.layout.activity_secure);
- }
- }