我正在尝试将GestureDetectorCompat.class
导入Android Studio,但是不起作用。
我尝试在活动的类定义上方添加import androidx.core.view.GestureDetectorCompat;
和import android.support.v4.view.GestureDetectorCompat;
,但显示为Cannot resolve symbol 'GestureDetectorCompat'
错误。
将鼠标悬停在代码中的GestureDetectorCompat
上,我可以看到将库添加到类路径的选项,但是单击它不会执行任何操作,仍然无法解析该符号。
我试图将其添加到ExoPlayer演示应用程序PlayerActivity类中。
private void initGesture()
{
GestureDetectorCompat mDetector = new GestureDetectorCompat(this, this);
}
build.gradle(模块:应用)
// Copyright (C) 2016 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
apply from: '../../constants.gradle'
apply plugin: 'com.android.application'
android {
compileSdkVersion project.ext.compileSdkVersion
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
defaultConfig {
versionName project.ext.releaseVersion
versionCode project.ext.releaseVersionCode
minSdkVersion 16
targetSdkVersion project.ext.targetSdkVersion
}
buildTypes {
release {
shrinkResources true
minifyEnabled true
proguardFiles = [
"proguard-rules.txt",
getDefaultProguardFile('proguard-android.txt')
]
}
debug {
jniDebuggable = true
}
}
lintOptions {
// The demo app does not have translations.
disable 'MissingTranslation'
}
flavorDimensions "extensions"
productFlavors {
noExtensions {
dimension "extensions"
}
withExtensions {
dimension "extensions"
}
}
}
dependencies {
implementation 'com.android.support:support-annotations:' + supportLibraryVersion
implementation project(modulePrefix + 'library-core')
implementation project(modulePrefix + 'library-dash')
implementation project(modulePrefix + 'library-hls')
implementation project(modulePrefix + 'library-smoothstreaming')
implementation project(modulePrefix + 'library-ui')
withExtensionsImplementation project(path: modulePrefix + 'extension-ffmpeg')
withExtensionsImplementation project(path: modulePrefix + 'extension-flac')
withExtensionsImplementation project(path: modulePrefix + 'extension-ima')
withExtensionsImplementation project(path: modulePrefix + 'extension-opus')
withExtensionsImplementation project(path: modulePrefix + 'extension-vp9')
withExtensionsImplementation project(path: modulePrefix + 'extension-rtmp')
}
apply plugin: 'com.google.android.gms.strict-version-matcher-plugin'
我希望可以添加该类并使其正常工作,但是遇到了以上问题。
答案 0 :(得分:1)
我为有此问题的任何人添加以下答案:(上一个不适用于我)
我不得不替换以下导入
\'"
与此:
import android.support.v4.view.GestureDetectorCompat;
使用它。
我认为原因是'android.support.v4'中的某些子包已被弃用,我们应该从'androidx'中使用它们
答案 1 :(得分:0)
解决方案:GestureDetectorCompat属于com.android.support:support-compat
依赖项。您必须将其添加到gradle文件的依赖项中。
dependencies {
// Your dependencies here.
// ...
// Add this line.
implementation 'com.android.support:support-compat:28.0.0'
}
然后在代码中使用。
import android.support.v4.view.GestureDetectorCompat;
private void initGesture() {
GestureDetectorCompat mDetector = new GestureDetectorCompat(this, this);
}
答案 2 :(得分:0)
新版本的Android v4软件包已从其中删除了视图。因此,在上面的代码行中使用GestureDetactorCompat
。