Android应用程序调用系统解锁页面

mKeyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);/** *判断设备有没有设置解锁密码 */if (!mKeyguardManager.isKeyguardSecure()) {    // Show a message that the user hasn't set up a lock screen.    Toast.makeText(this,"Secure lock screen hasn't set up.\n"           + "Go to 'Settings -> Security -> Screenlock' to set up a lock screen",            Toast.LENGTH_LONG).show();    purchaseButton.setEnabled(false);    return;} /** *跳转到系统解锁页面 */private void showAuthenticationScreen() {    // Create the Confirm Credentials screen. You can customize the title and description. Or    // we will provide a generic one for you if you leave it null    Intent intent = mKeyguardManager.createConfirmDeviceCredentialIntent(null, null);    if (intent != null) {        startActivityForResult(intent, REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS);    }} /**  *接收系统解锁是否成功  */@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {    if (requestCode == REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS) {        // Challenge completed, proceed with using cipher        if (resultCode == RESULT_OK) {            if (tryEncrypt()) {                showPurchaseConfirmation();            }        } else {            // The user canceled or didn’t complete the lock screen            // operation. Go to error/cancellation flow.        }    }}

注意事项

跳转系统解锁页面只能在5.0以上的设备使用，5.0以下的不支持
如果不对设备进行设置密码判断，intent就会返回一个null，一定要对null值进行判断

参考文档

日本的博客链接
谷歌的官网demo

Android应用程序调用系统解锁页面

Android应用程序调用系统解锁页面

注意事项

参考文档

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