fix:修复安卓手机focus软键盘不会自动弹出的bug，软键盘弹出位置修正

src/core/view/components/input/index.vue

 <template>
-  <uni-input
-    @change.stop
+  <uni-input
+    @change.stop
     v-on="$listeners">
     <div
       ref="wrapper"
@@ -33,13 +33,13 @@
 </template>
 <script>
 import {
-  emitter
+  emitter, keyboard
 } from 'uni-mixins'
 const INPUT_TYPES = ['text', 'number', 'idcard', 'digit', 'password']
 const NUMBER_TYPES = ['number', 'digit']
 export default {
   name: 'Input',
-  mixins: [emitter],
+  mixins: [emitter, keyboard],
   model: {
     prop: 'value',
     event: 'update:value'
@@ -166,6 +166,8 @@ export default {
     }
 
     this.focus && this._focusInput()
+
+    this.initKeyboard(this.$refs.input)
   },
   beforeDestroy () {
     this.$dispatch('Form', 'uni-form-group-update', {
@@ -225,6 +227,10 @@ export default {
     },
     _focusInput () {
       setTimeout(() => {
+        this.plusReady(() => {
+          plus.key.showSoftKeybord()
+        })
+
         this.$refs.input.focus()
       }, 350)
     },
@@ -308,7 +314,7 @@ uni-input[hidden] {
   height: 100%;
   background: none;
   color: inherit;
-  opacity: 1;
+  opacity: 1;
   -webkit-text-fill-color: currentcolor;
   font: inherit;
   line-height: inherit;

src/core/view/mixins/index.js

@@ -16,4 +16,9 @@ export {
 export {
   default as subscriber
 }
-  from './subscriber'
+  from './subscriber'
+
+export {
+  default as keyboard
+}
+  from './keyboard'

src/core/view/mixins/keyboard.js

+export default {
+  name: 'Keyboard',
+  props: {
+    cursorSpacing: {
+      type: Number,
+      default: 0
+    },
+    adjustPosition: {
+      type: Boolean,
+      default: true
+    }
+  },
+  methods: {
+    plusReady (callback) {
+      if (!callback) {
+        return
+      }
+      if (window.plus) {
+        return callback()
+      }
+      document.addEventListener('plusready', callback)
+    },
+    initKeyboard (el) {
+      el.addEventListener('focus', () => {
+        this.plusReady(() => {
+          var currentWebview = plus.webview.currentWebview()
+          var style = currentWebview.getStyle() || {}
+          if (style.softinputMode === 'adjustResize') {
+            return
+          }
+          var rect = this.$el.getBoundingClientRect()
+          currentWebview.setSoftinputTemporary && currentWebview.setSoftinputTemporary({
+            mode: this.adjustPosition ? 'adjustPan' : 'nothing',
+            position: {
+              top: rect.top,
+              height: rect.height + this.cursorSpacing
+            }
+          })
+        })
+      })
+    }
+  }
+}