Android动态获取运行时权限RxPermissions

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

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:[email protected]'

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:[email protected]'
}

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：

Android动态获取运行时权限RxPermissions

Android动态获取运行时权限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:[email protected]'

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:[email protected]'
}

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：

Android动态获取运行时权限RxPermissions

Android动态获取运行时权限RxPermissions

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