我是Android Studio新手。我的项目正在运行并执行,但每当我点击activity_main.xml
时,我都会看到我不理解的错误。错误是
Rendering Problems The following classes could not be found:
- android.support.v7.widget.AppCompatTextView (Fix Build Path, Edit XML, Create Class)
我的activity_main.xml
是:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:background="#5b9bd5">
<ImageButton
android:id="@+id/regiterbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/registerbutton"
android:layout_marginBottom="67dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
<ImageButton
android:id="@+id/loginbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/loginbutton"
android:layout_above="@+id/regiterbutton"
android:layout_alignLeft="@+id/regiterbutton"
android:layout_alignStart="@+id/regiterbutton"
android:layout_marginBottom="50dp" />
</RelativeLayout>
我的AndroidManifest.xml是:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.jawadrauf.ratingapp" >
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="16"
tools:overrideLibrary="com.facebook" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<!-- Connect to Internet Permissions -->
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>
我的build.gradle是:
apply plugin: 'com.android.application'
android {
compileSdkVersion 17
buildToolsVersion '19.1.0'
defaultConfig {
applicationId "com.example.jawadrauf.ratingapp"
minSdkVersion 8
targetSdkVersion 19
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt')
, 'proguard-rules.pro'
}
}
}
repositories {
// You can also use jcenter if you prefer
mavenCentral()
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.facebook.android:facebook-android-sdk:4.5.0'
compile 'com.android.support:appcompat-v7:20.0.0'
}
答案 0 :(得分:3)
AppCompatTextView
中添加了 appcompat-v7:22.1.0
,appcompat-v7
的最新版本为24.0.0
。您在gradle文件中使用了非常旧的版本20.0.0
。
您必须使用
更新您的gradle文件compile 'com.android.support:appcompat-v7:24.0.0'
并确保在SKD Manager中安装了所有更新,包括最新版本的支持库。