1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 18 package com.android.email.view; 19 20 import android.content.Context; 21 import android.content.res.Resources; 22 import android.os.Parcel; 23 import android.os.Parcelable; 24 import android.security.KeyChain; 25 import android.text.TextUtils; 26 import android.util.AttributeSet; 27 import android.view.View; 28 import android.view.View.OnClickListener; 29 import android.widget.Button; 30 import android.widget.RelativeLayout; 31 import android.widget.TextView; 32 33 import com.android.email.R; 34 import com.android.email.activity.UiUtilities; 35 36 /** 37 * A simple view that can be used to select a certificate from the system {@link KeyChain}. 38 * 39 * Host activities must register themselves view {@link #setHostCallback} for this selector to work. 40 */ 41 public class CertificateSelector extends RelativeLayout implements OnClickListener { 42 43 /** Button to select or remove the certificate. */ 44 private Button mSelectButton; 45 private TextView mAliasText; 46 47 /** The value of the cert selected, if any. Null, otherwise. */ 48 private String mValue; 49 50 /** The host activity. */ 51 private HostCallback mHost; 52 53 public interface HostCallback { onCertificateRequested()54 void onCertificateRequested(); 55 } 56 CertificateSelector(Context context)57 public CertificateSelector(Context context) { 58 super(context); 59 } CertificateSelector(Context context, AttributeSet attrs)60 public CertificateSelector(Context context, AttributeSet attrs) { 61 super(context, attrs); 62 } CertificateSelector(Context context, AttributeSet attrs, int defStyle)63 public CertificateSelector(Context context, AttributeSet attrs, int defStyle) { 64 super(context, attrs, defStyle); 65 } 66 setHostCallback(HostCallback host)67 public void setHostCallback(HostCallback host) { 68 mHost = host; 69 } 70 setDelegate(String uri)71 public void setDelegate(String uri) { 72 } 73 74 @Override onFinishInflate()75 protected void onFinishInflate() { 76 super.onFinishInflate(); 77 78 mAliasText = UiUtilities.getView(this, R.id.certificate_alias); 79 mSelectButton = UiUtilities.getView(this, R.id.select_button); 80 mSelectButton.setOnClickListener(this); 81 setCertificate(null); 82 } 83 setCertificate(String alias)84 public void setCertificate(String alias) { 85 Resources res = getResources(); 86 mValue = alias; 87 mAliasText.setText( 88 TextUtils.isEmpty(alias) 89 ? res.getString(R.string.account_setup_exchange_no_certificate) 90 : alias); 91 mSelectButton.setText(res.getString( 92 TextUtils.isEmpty(alias) 93 ? R.string.account_setup_exchange_select_certificate 94 : R.string.account_setup_exchange_remove_certificate)); 95 } 96 hasCertificate()97 public boolean hasCertificate() { 98 return mValue != null; 99 } 100 101 /** 102 * Gets the alias for the currently selected certificate, or null if one is not selected. 103 */ getCertificate()104 public String getCertificate() { 105 return mValue; 106 } 107 108 109 @Override onClick(View target)110 public void onClick(View target) { 111 if (target == mSelectButton && mHost != null) { 112 if (hasCertificate()) { 113 // Handle the click on the button when it says "Remove" 114 setCertificate(null); 115 } else { 116 mHost.onCertificateRequested(); 117 } 118 } 119 } 120 121 @Override onRestoreInstanceState(Parcelable parcel)122 protected void onRestoreInstanceState(Parcelable parcel) { 123 SavedState savedState = (SavedState) parcel; 124 super.onRestoreInstanceState(savedState.getSuperState()); 125 setCertificate(savedState.mValue); 126 } 127 128 @Override onSaveInstanceState()129 protected Parcelable onSaveInstanceState() { 130 return new SavedState(super.onSaveInstanceState(), getCertificate()); 131 } 132 133 public static class SavedState extends BaseSavedState { 134 final String mValue; 135 SavedState(Parcelable superState, String value)136 SavedState(Parcelable superState, String value) { 137 super(superState); 138 mValue = value; 139 } 140 141 @Override writeToParcel(Parcel out, int flags)142 public void writeToParcel(Parcel out, int flags) { 143 super.writeToParcel(out, flags); 144 out.writeString(mValue); 145 } 146 147 @SuppressWarnings("hiding") 148 public static final Parcelable.Creator<SavedState> CREATOR 149 = new Parcelable.Creator<SavedState>() { 150 @Override 151 public SavedState createFromParcel(Parcel in) { 152 return new SavedState(in); 153 } 154 155 @Override 156 public SavedState[] newArray(int size) { 157 return new SavedState[size]; 158 } 159 }; 160 SavedState(Parcel in)161 private SavedState(Parcel in) { 162 super(in); 163 mValue = in.readString(); 164 } 165 } 166 } 167