java - Android 联系人权限无需在运行时询问即可授予

Question

我正在尝试请求在应用程序中读取联系人的功能，并且已经遵循了几个教程。所有这些都在此过程中使用几乎相同的代码。下面是我的 MainActivity.java 文件中的代码，应该请求权限。

private void checkContactPermissions()
    {
        if(ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) == PackageManager.PERMISSION_GRANTED) {
            Log.i(TAG, "Contacts permission NOT granted");
            ActivityCompat.requestPermissions(MainActivity.this,
                    new String[]{Manifest.permission.READ_CONTACTS}, MY_PERMISSIONS_REQUEST_READ_CONTACTS);
        }
        else
        {
            Log.i(TAG, "Contacts permission granted");
            readContacts();
        }
    }

我的manifest.xml还包含以下行:

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

当应用程序在模拟器或物理调试设备上运行时，它不会请求权限，但日志会指出已授予权限。我已通过转到设置并检查权限已关闭来确认权限已关闭。还有什么会导致应用程序像授予了权限一样执行。

Answer 1

试试这个，

private Context mContext=YourActivity.this;

private static final int REQUEST = 112;

if (Build.VERSION.SDK_INT >= 23) {
    String[] PERMISSIONS = {android.Manifest.permission.READ_CONTACTS};
    if (!hasPermissions(mContext, PERMISSIONS)) {
        ActivityCompat.requestPermissions((Activity) mContext, PERMISSIONS, REQUEST );
    } else {
        readContacts();
    }
} else {
    readContacts();
}

获取权限结果

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    switch (requestCode) {
        case REQUEST: {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    readContacts();
            } else {
                Toast.makeText(mContext, "The app was not allowed to read your contact", Toast.LENGTH_LONG).show();
            }
        }
    }
}

检查棉花糖的权限

private static boolean hasPermissions(Context context, String... permissions) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && context != null && permissions != null) {
        for (String permission : permissions) {
            if (ActivityCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {
                return false;
            }
        }
    }
    return true;
}

list

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