Activity.class
或 AppCompatActivity.class
中似乎没有我可以实现的 onRequestPermissionsResult
方法。
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:
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'
}
最佳答案
首先,onRequestPermissionsResult
仅可从支持库24.1.0
under ActivityCompat.OnRequestPermissionsResultCallback.获取
因此,您需要将 build.gradle
修改为最低 targetSdkVersion 24
,然后添加 implementation 'com.android.support:appcompat-v7:24.1.0 '
到您的依赖项。
第二,这是不正确的:
@Override
protected void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
}
这是正确的:
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
}
请注意,您需要 public
访问修饰符,而不是 protected
。
关于java - onRequestPermissionsResult 方法不会覆盖其父类(super class)中的方法吗?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55233694/