文章目录
1、单个权限动态申请
以SD 卡读写 权限 为例
1)文件结构
2） 在 AndroidManifest.xml 添加权限
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
3）在代码里进行权限检查 和 申请
package com.example.lum.myapplicationpermission;
import android.Manifest;
import android.content.pm.PackageManager;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
public class MainActivity extends AppCompatActivity {
private String TAG = "MainActivity: ";
private final int REQUESTCODE = 100;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
checkPermission();
}
//sd 卡权限检查
private void checkPermission() {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) {
Log.i(TAG,"没有权限进行申请");
ActivityCompat.requestPermissions(this, new String[]
{Manifest.permission.WRITE_EXTERNAL_STORAGE},REQUESTCODE);
} else {
Log.i(TAG,"已经有权限");
}
}
//sd 卡权限申请
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
if(requestCode == REQUESTCODE){
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Log.i(TAG,"用户同意权限申请");
} else {
Log.i(TAG,"用户不同意权限申请");
}
}
}
}
2、多个权限 动态申请
1) 在 AndroidManifest.xml 添加权限
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.INTERNET"/>
2)、MainActivity 文件
package com.example.lum.myapplicationpermission;
import android.Manifest;
import android.app.Activity;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.provider.Settings;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private String TAG = "MainActivity: ";
private List<String> unPermissionList = new ArrayList<String>(); //申请未得到授权的权限列表
private final int RequestCode = 100;//权限请求码
private AlertDialog mPermissionDialog;
private String mPackName ; //获取 a'p'k 包名
private String[] permissionList = new String[]{ //申请的权限列表
Manifest.permission.CAMERA,
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE,
Manifest.permission.INTERNET
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
checkPermission();
mPackName = getPackageName();
}
//权限判断和申请
public void checkPermission() {
unPermissionList.clear();//清空申请的没有通过的权限
//逐个判断是否还有未通过的权限
for (int i = 0; i < permissionList.length; i++) {
if (ContextCompat.checkSelfPermission(this, permissionList[i]) !=
PackageManager.PERMISSION_GRANTED) {
unPermissionList.add(permissionList[i]);//添加还未授予的权限到unPermissionList中
}
}
//有权限没有通过，需要申请
if (unPermissionList.size() > 0) {
ActivityCompat.requestPermissions( this,permissionList, 100);
Log.i(TAG, "check 有权限未通过");
} else {
//权限已经都通过了，可以将程序继续打开了
Log.i(TAG, "check 权限都已经申请通过");
}
}
/**
* 5.请求权限后回调的方法
*
* @param requestCode 是我们自己定义的权限请求码
* @param permissions 是我们请求的权限名称数组
* @param grantResults 是我们在弹出页面后是否允许权限的标识数组，数组的长度对应的是权限
* 名称数组的长度，数组的数据0表示允许权限，-1表示我们点击了禁止权限
*/
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions,
int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
Log.i(TAG,"申请结果反馈");
boolean hasPermissionDismiss = false;
if (100 == requestCode) {
for (int i = 0; i < grantResults.length; i++) {
if (grantResults[i] == -1) {
hasPermissionDismiss = true; //有权限没有通过
Log.i(TAG,"有权限没有被通过");
break;
}
}
}
if (hasPermissionDismiss) {//如果有没有被允许的权限
showPermissionDialog();
} else {
//权限已经都通过了，可以将程序继续打开了
Log.i(TAG, "onRequestPermissionsResult 权限都已经申请通过");
}
}
/**
* 不再提示权限时的展示对话框
*/
private void showPermissionDialog() {
Log.i(TAG,"mPackName: " + mPackName);
if (mPermissionDialog == null) {
mPermissionDialog = new AlertDialog.Builder(this)
.setMessage("已禁用权限，请手动授予")
.setPositiveButton("设置", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
cancelPermissionDialog();
Uri packageURI = Uri.parse("package:" + mPackName); //去设置里面设置
Intent intent = new Intent(Settings.
ACTION_APPLICATION_DETAILS_SETTINGS, packageURI);
startActivity(intent);
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//关闭页面或者做其他操作
cancelPermissionDialog();
}
})
.create();
}
mPermissionDialog.show();
}
private void cancelPermissionDialog() {
mPermissionDialog.cancel();
}
}
想尝试定义一个单独的 permissionUtils 类来实现 权限申请，没有成功。。。。。
权限 回调函数 不执行
文章参考：
每日一记—Android动态申请多个权限
https://blog.csdn.net/weixin_39657438/article/details/82588576
Android PermissionUtils：运行时权限工具类及申请权限的正确姿势
https://blog.csdn.net/ifadai/article/details/73333940