添加导入、导出身份功能，目前导入到默认文件、从默认文件中读取

app/src/main/java/com/pkusz/min_vpn_client/activity/login/LoginActivity.java

@@ -42,6 +42,8 @@ import cn.qjm253.quick_android_easy_bar.EasyBar;
 import cn.qjm253.quick_android_easy_bar.EasyBarExtensionsKt;
 import kotlin.Unit;
 import kotlin.jvm.functions.Function1;
+import com.pkusz.min_vpn_client.utils.IdentityDump;
+
 
 public class LoginActivity extends MINVpnBaseActivity<LoginActivityPresenter>
     implements LoginActivityContract.View{
@@ -140,6 +142,26 @@ public class LoginActivity extends MINVpnBaseActivity<LoginActivityPresenter>
             etPassword.setText(MINVpnSettingAPI.INSTANCE.getPassword());
         }
 
+        //导出按钮
+        export_identity.setBackgroundResource(R.drawable.button_shape_default);
+        export_identity.setOnClickListener(v->{
+            ContextExtensionKt.hideSoftKeyboard(this,export_identity);
+            export_identity.startAnimation();
+            export_identity.revertAnimation();
+            new IdentityDump().exportIdentity();
+            Toast.makeText(this, "You clicked export identity button", Toast.LENGTH_SHORT).show();
+        });
+
+        //导入按钮
+        import_identity.setBackgroundResource(R.drawable.button_shape_default);
+        import_identity.setOnClickListener(v->{
+            ContextExtensionKt.hideSoftKeyboard(this,import_identity);
+            import_identity.startAnimation();
+            import_identity.revertAnimation();
+            new IdentityDump().importIdentity();
+            Toast.makeText(this, "You clicked import identity button", Toast.LENGTH_SHORT).show();
+        });
+
         // 登录按钮
         btnLogin.setBackgroundResource(R.drawable.button_shape_default);
         btnLogin.setOnClickListener(v->{
@@ -189,6 +211,10 @@ public class LoginActivity extends MINVpnBaseActivity<LoginActivityPresenter>
                         ViewExtensionKt.transYAnimation(etPassword,
                                 0f, -DisplayUtils.dp2px(this, 90)),
                         ViewExtensionKt.transYAnimation(btnLogin,
+                                0f, -DisplayUtils.dp2px(this, 90)),
+                        ViewExtensionKt.transYAnimation(export_identity,
+                                0f, -DisplayUtils.dp2px(this, 90)),
+                        ViewExtensionKt.transYAnimation(import_identity,
                                 0f, -DisplayUtils.dp2px(this, 90)));
             }else{
                 ViewExtensionKt.animer200(imageView_imgLogo,
@@ -201,6 +227,10 @@ public class LoginActivity extends MINVpnBaseActivity<LoginActivityPresenter>
                         ViewExtensionKt.transYAnimation(etPassword,
                                 0f, -DisplayUtils.dp2px(this, 90),0f),
                         ViewExtensionKt.transYAnimation(btnLogin,
+                                0f, -DisplayUtils.dp2px(this, 90),0f),
+                        ViewExtensionKt.transYAnimation(export_identity,
+                                0f, -DisplayUtils.dp2px(this, 90),0f),
+                        ViewExtensionKt.transYAnimation(import_identity,
                                 0f, -DisplayUtils.dp2px(this, 90),0f));
             }
             return null;

app/src/main/java/com/pkusz/min_vpn_client/utils/IdentityDump.java

@@ -0,0 +1,84 @@
+package com.pkusz.min_vpn_client.utils;
+
+
+import security.SafeBag;
+import util.FileUtil;
+import java.io.IOException;
+import java.util.Arrays;
+
+
+public class IdentityDump {
+    // 身份信息保存位置
+    public static String identityPath="/storage/emulated/0/Identity/";
+    // 用户名
+    public static String username="UserName1";
+    // 身份文件保存位置
+    public static String identityFilePath=identityPath+username+".export";
+
+    /**
+     * 生成本地密钥，持久化存储到本地硬盘
+     * @param username
+     * @param identityPath
+     */
+    private void generateForeverIdentity(String username,String identityPath){
+        // identityName是将username前面加上"/"
+        String identityName="/"+username;
+        KeyManager.INSTANCE.initKeyChain(identityName,identityPath);
+    }
+
+    /**
+     * 导出用户身份
+     */
+    public void exportIdentity(){
+        // 生成数据库身份
+        new IdentityDump().generateForeverIdentity(username,identityPath);
+        System.out.println("生成的用户身份: "+KeyManager.INSTANCE
+                .getIdentity("/"+username,identityPath));
+        // 导出数据库身份
+        SafeBag safeBag;
+        try {
+            safeBag=KeyManager.INSTANCE.getKeyChain().exportSafeBag("");
+            System.out.println(Arrays.toString(safeBag.getValue()));
+        } catch (Exception e) {
+            e.printStackTrace();
+            return;
+        }
+        // 将身份数据写入本地文件
+        try {
+            FileUtil.writeFile(identityFilePath,safeBag.getValue());
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * 导入用户身份
+     */
+    public void importIdentity(){
+        // 导入身份前查看是否有该用户身份
+//        System.out.println("试图取出未导入的用户身份: "+KeyManager.INSTANCE
+//                .getIdentity("/"+username,identityPath));
+        // 从本地文件中读取身份数据
+        byte[] identityBytes;
+        try {
+            identityBytes=FileUtil.readFile(identityFilePath);
+        } catch (IOException e) {
+            e.printStackTrace();
+            return;
+        }
+        // 转成SafeBag
+        SafeBag safeBag=new SafeBag(identityBytes);
+        // 导入到本地身份数据库中
+        try {
+            KeyManager.INSTANCE.getKeyChain().importSafeBag(safeBag,"",true);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        // 导入身份后查看是否有该用户身份
+        System.out.println("查看是否成功导入用户身份: "+KeyManager.INSTANCE
+                .getIdentity("/"+username,identityPath));
+    }
+
+
+
+}

app/src/main/res/layout/activity_login.xml

@@ -94,12 +94,50 @@
     <!--        app:layout_constraintEnd_toEndOf="parent" />-->
 
 
+    <br.com.simplepass.loadingbutton.customViews.CircularProgressButton
+        android:id="@+id/export_identity"
+        android:layout_width="match_parent"
+        android:layout_height="35dp"
+        android:layout_marginStart="40dp"
+        android:layout_marginTop="25dp"
+        android:layout_marginEnd="200dp"
+        android:background="@drawable/button_shape_default"
+        android:textColor="@color/white"
+        android:text="导出身份"
+        app:layout_constraintLeft_toLeftOf="@id/etPassword"
+        app:layout_constraintRight_toRightOf="@id/etPassword"
+        app:layout_constraintTop_toBottomOf="@id/etPassword"
+        app:spinning_bar_color="#FFFFFF"
+        app:spinning_bar_padding="4dp"
+        app:spinning_bar_width="3dp"
+        app:finalCornerAngle="40dp"
+        app:initialCornerAngle="0dp" />
+
+    <br.com.simplepass.loadingbutton.customViews.CircularProgressButton
+        android:id="@+id/import_identity"
+        android:layout_width="match_parent"
+        android:layout_height="35dp"
+        android:layout_marginStart="200dp"
+        android:layout_marginTop="25dp"
+        android:layout_marginEnd="40dp"
+        android:background="@drawable/button_shape_default"
+        android:text="导入身份"
+        android:textColor="@color/white"
+        app:finalCornerAngle="40dp"
+        app:initialCornerAngle="0dp"
+        app:layout_constraintLeft_toLeftOf="@id/etPassword"
+        app:layout_constraintRight_toRightOf="@id/etPassword"
+        app:layout_constraintTop_toBottomOf="@id/etPassword"
+        app:spinning_bar_color="#FFFFFF"
+        app:spinning_bar_padding="4dp"
+        app:spinning_bar_width="3dp" />
+
     <br.com.simplepass.loadingbutton.customViews.CircularProgressButton
         android:id="@+id/btnLogin"
         android:layout_width="match_parent"
         android:layout_height="40dp"
         android:layout_marginStart="40dp"
-        android:layout_marginTop="40dp"
+        android:layout_marginTop="75dp"
         android:layout_marginEnd="40dp"
         android:background="@drawable/button_shape_default"
         android:text="@string/login"