Android动态获取运行时权限RxPermissions

比眉伴天荒 2023-10-17 13:01 137阅读 0赞

**Android动态获取运行时权限RxPermissions**

新版的Android权限控制更加严格，一般需要在APP的运行时动态获取，如果按照谷歌官方的方法比葫芦画瓢获取动态运行时权限，代码比较繁琐，如果和业务逻辑再搅和在一起，代码的可读性变得比较差，因此一些第三方的运行时权限获取库因运而生。  
RxPermissions基于RxJava2，实现了一种更为灵活和简洁的Android动态获取运行时权限的解决方案。其在github上的项目地址：[https://github.com/tbruyelle/RxPermissions][https_github.com_tbruyelle_RxPermissions]

首先需要在app的build.gradle文件引入RxPermissions以及RxJava2：

compile 'io.reactivex.rxjava2:rxjava:2.0.1'
        compile 'com.tbruyelle.rxpermissions2:rxpermissions:0.9.4@aar'

RxPermissions需要Java1.8，同时需要开启jackOptions，写好的app的build.gradle文件例如：

apply plugin: 'com.android.application'
    
    android {
        compileSdkVersion 25
        buildToolsVersion '25.0.2'
        defaultConfig {
            applicationId "zhangfei.demo"
            minSdkVersion 21
            targetSdkVersion 25
            versionCode 1
            versionName "1.0"
            testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    
            jackOptions {
                enabled true
            }
        }
    
        buildTypes {
            release {
                minifyEnabled false
                proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            }
        }
    
        compileOptions {
            sourceCompatibility JavaVersion.VERSION_1_8
            targetCompatibility JavaVersion.VERSION_1_8
        }
    }
    
    dependencies {
        compile fileTree(include: ['*.jar'], dir: 'libs')
        androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
            exclude group: 'com.android.support', module: 'support-annotations'
        })
        compile 'com.android.support:appcompat-v7:25.3.1'
        testCompile 'junit:junit:4.12'
    
    
        compile 'io.reactivex.rxjava2:rxjava:2.0.1'
        compile 'com.tbruyelle.rxpermissions2:rxpermissions:0.9.4@aar'
    }

假设在Androidmanifest.xml申请两个读写权限：

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
        <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

上层Java代码：

package zhangfei.demo;
    
    import android.Manifest;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Toast;
    
    import com.tbruyelle.rxpermissions2.RxPermissions;
    
    public class MainActivity extends AppCompatActivity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    getPermissions();
                }
            });
        }
    
        private void getPermissions() {
            RxPermissions rxPermissions = new RxPermissions(this);
            rxPermissions.request(Manifest.permission.READ_EXTERNAL_STORAGE,
                    Manifest.permission.WRITE_EXTERNAL_STORAGE)
                    .subscribe(granted -> {
                        if (granted) {
                            Toast.makeText(getApplicationContext(), "已经获取所需权限", Toast.LENGTH_SHORT)
                                    .show();
                        } else {
                            Toast.makeText(getApplicationContext(), "未能获取所需权限", Toast.LENGTH_SHORT)
                                    .show();
                        }
                    });
        }
    }

假设在APP运行时候拒绝，那么点击获取按钮，调用getPermissions后：

![Center][]

[https_github.com_tbruyelle_RxPermissions]: https://github.com/tbruyelle/RxPermissions
[Center]: https://img-blog.csdn.net/20170509152634933?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvemhhbmdwaGls/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center