no,min Sdk(API 21)> device Sdk(API 1)

android studio 真机调试，出现这个
android {
compileSdkVersion 23
buildToolsVersion '19.1.0'
defaultConfig {
applicationId "com.example.loney.myapplication"
minSdkVersion 19
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.4.0'
}