仓廪实则知礼节,衣食足则知荣辱。这篇文章主要讲述Android 扫描枪开发相关的知识,希望能为你提供帮助。
最近公司需要,准备开发扫描枪。
话不多说,直接开始
创建新项目
1 如果遇到
Error:Execution failed for task \':app:preDebugandroidTestBuild\'.
>
Conflict with dependency \'com.android.support:support-annotations\' in project \':app\'. Resolved versions for app (26.1.0) and test app (27.1.1) differ. See https://d.android.com/r/tools/test-apk-dependency-conflicts.html for details.
参见:https://www.cnblogs.com/hanjun0612/p/10141393.html
2 使用更加美观的android material design
在build.gradle中,增加如下
dependencies { compile \'com.github.navasmdc:MaterialDesign:1.5@aar\' }
如果遇到错误:
文章图片
注释build.gradle中的design
dependencies { //implementation \'com.android.support:design:26.1.0\'compile \'com.github.navasmdc:MaterialDesign:1.5@aar\' }
3 在res/layout/activity_main.xml中添加如下代码:
< ?xml version="1.0" encoding="utf-8"?> < android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.tyler.scangun_kps.MainActivity"> < TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!111" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> < com.gc.materialdesign.views.ButtonRectangle android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="#1E88E5" android:text="Button" /> < /android.support.constraint.ConstraintLayout>
4 显示效果
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【Android 扫描枪开发】
android material design帮助:https://android-arsenal.com/details/1/1156
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