[英]onRequestPermissionsResult method does not override method from its superclass?
There doesn't seem to be a onRequestPermissionsResult
method in Activity.class
or AppCompatActivity.class
that I can implement. 我可以实现的
Activity.class
或AppCompatActivity.class
中似乎没有onRequestPermissionsResult
方法。
MainActivity.java : MainActivity.java :
package com.example.ccccccc;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import java.io.File;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
protected void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
}
}
build.gradle : build.gradle :
apply plugin: 'com.android.application'
android {
compileSdkVersion 22
defaultConfig {
applicationId "com.example.ccccccc"
minSdkVersion 22
targetSdkVersion 22
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:22.2.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'com.android.support:design:22.2.0'
implementation 'com.google.zxing:core:3.3.0'
implementation 'com.google.zxing:javase:3.3.0'
}
First , onRequestPermissionsResult
is only available from support library 24.1.0
under ActivityCompat.OnRequestPermissionsResultCallback. 首先 ,
onRequestPermissionsResult
仅可从ActivityCompat.OnRequestPermissionsResultCallback下的支持库24.1.0
。
So you need to modify your build.gradle
with minimum targetSdkVersion 24
then add implementation 'com.android.support:appcompat-v7:24.1.0'
to your dependencies. 因此,您需要使用最低
targetSdkVersion 24
修改build.gradle
,然后将implementation 'com.android.support:appcompat-v7:24.1.0'
添加到您的依赖项中。
Second , this is incorrect: 其次 ,这是不正确的:
@Override
protected void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
}
this is correct: 这是对的:
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
}
Notice that you need public
access modifier instead protected
. 请注意,您需要
public
访问修饰符而不是protected
。
The method was added to the support library with version 24.1. 该方法已添加到版本24.1的支持库中。 You are using version 22.
您正在使用版本22。
Please update your support library > 24.1.0
, because of onRequestPermissionsResult
method available from 24.1.0
onwards 由于
onRequestPermissionsResult
方法从24.1.0
开始可用,因此请更新您的支持库> 24.1.0
so you have to update your build.gradle 所以你必须更新build.gradle
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.example.ccccccc"
minSdkVersion 22
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'com.android.support:design:28.0.0'
implementation 'com.google.zxing:core:3.3.0'
implementation 'com.google.zxing:javase:3.3.0'
}
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