更换二维码扫描库依赖，解决原有依赖在高版本上相机无法启动的问题，添加 API 21 以上使用 Material 主题的配置。添加混淆过滤

Author: twiceyuan

app/build.gradle

@@ -24,27 +24,18 @@ android {
     }
     buildTypes {
         release {
-            minifyEnabled false
+            minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
 }
 
-repositories {
-    mavenCentral()
-
-    maven {
-        url "https://raw.github.com/embarkmobile/zxing-android-minimal/mvn-repo/maven-repository/"
-    }
-}
-
 dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
 
     testCompile 'junit:junit:4.12'
 
-    compile 'com.embarkmobile:zxing-android-minimal:2.0.0@aar'
-    compile 'com.embarkmobile:zxing-android-integration:2.0.0@aar'
+    compile 'com.journeyapps:zxing-android-embedded:3.5.0'
     compile 'com.google.zxing:core:3.0.1'
 
     compile 'org.bouncycastle:bcprov-jdk15on:1.57'

app/proguard-rules.pro

@@ -15,3 +15,5 @@
 #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
 #   public *;
 #}
+-keep class com.journeyapps.barcodescanner.** { *; }
+-dontwarn org.bouncycastle.**

app/src/main/java/com/vm/shadowsocks/ui/MainActivity.java

@@ -170,7 +170,6 @@ public void onClick(DialogInterface dialogInterface, int i) {
 
     private void scanForProxyUrl() {
         new IntentIntegrator(this)
-                .setResultDisplayDuration(0)
                 .setPrompt(getString(R.string.config_url_scan_hint))
                 .initiateScan(IntentIntegrator.QR_CODE_TYPES);
     }

app/src/main/res/values-v21/styles.xml

@@ -0,0 +1,18 @@
+<resources>
+
+    <!--
+        Base application theme for API 14+. This theme completely replaces
+        AppBaseTheme from BOTH res/values/styles.xml and
+        res/values-v11/styles.xml on API 14+ devices.
+    -->
+    <style name="AppBaseTheme" parent="android:Theme.Material.Light.DarkActionBar">
+        <!-- API 14 theme customizations can go here. -->
+    </style>
+
+    <style name="StyledScrollerTextAppearance" parent="@android:style/TextAppearance">
+        <item name="android:textSize">24sp</item>
+        <item name="android:textStyle">bold</item>
+        <item name="android:textColor">@android:color/white</item>
+    </style>
+
+</resources>

app/src/main/res/values/styles.xml

@@ -4,7 +4,7 @@
         Base application theme, dependent on API level. This theme is replaced
         by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
     -->
-    <style name="AppBaseTheme" parent="android:Theme.Black">
+    <style name="AppBaseTheme" parent="android:Theme.DeviceDefault.Light">
         <!--
             Theme customizations available in newer API levels can go in
             res/values-vXX/styles.xml, while customizations related to