我在Android Studio
上启动了一个新项目,定位API 26
,除了添加以下内容之外什么都没做:
import android.util.MathUtils;
并收到错误:Cannot resolve symbol MathUtils
这是我的MainActivity.java
:
package com.example.HeyJude.test2;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.MathUtils;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
我的build.gradle
:
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
defaultConfig {
applicationId "com.example.HeyJude.test2"
minSdkVersion 26
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}
我尝试使用File > Invalidate Caches
(重启),但没有帮助。还有其他想法吗?
答案 0 :(得分:0)
如果你搜索它,你的意思是这个吗?
android.support.v4.math.MathUtils