- 先注册。先在 module 下的 src/main/AndroidManifest.xml 注册要申请的权限。举个例子,比如我们要申请写入外部存储的权限 android.permission.WRITE_EXTERNAL_STORAGE,AndroidManifest.xml 权限注册的代码如下所示:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:dataExtractionRules="@xml/data_extraction_rules"
android:fullBackupContent="@xml/backup_rules"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.MyApplication"
tools:targetApi="31">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<meta-data
android:name="android.app.lib_name"
android:value="" />
</activity>
</application>
</manifest>
- 申请权限以及一些细节的处理(比如如果用户拒绝应用获取该权限、下次是否还需继续询问等,如果只需询问一次,则按以下代码处理即可)申请权限的代码如下所示:
package com.example.myapplication;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.core.content.PackageManagerCompat;
import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private static final int MY_PERMISSIONS_READ_SMS_REQ_CODE = 1;
private static final String TAG = "Hello";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
requestPermission();
}
public void requestPermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_SMS) != PackageManager.PERMISSION_GRANTED) {
//检查到未授权该权限信息
//Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.READ_SMS)) {
//上一次用户拒绝了开启此权限!
Log.e(TAG, "requestPermission: 上一次用户拒绝了开启此权限");
//权限申请完成,回调
}else {
Log.e(TAG, "requestPermission: 开始申请权限");
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.READ_SMS},MY_PERMISSIONS_READ_SMS_REQ_CODE);
}
}else {
Log.e(TAG, "requestPermission: 用户已经同意过授权");
//权限申请完成,回调
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_READ_SMS_REQ_CODE: {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this,"申请成功",Toast.LENGTH_SHORT).show();
}else {
Toast.makeText(this,"申请失败",Toast.LENGTH_SHORT).show();
}
//权限申请完成,回调
return;
}
}
}
}
以上,感谢阅读!
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