您好，您可以在清单文件中使用这些权限以及其他权限，
<uses-feature
android:name="android.hardware.camera.any"
android:required="true" />
<uses-feature
android:name="android.hardware.camera.autofocus"
android:required="false" />
如果仍然无法正常工作，那么可能是您使用的是 android M，因此您需要以编程方式添加权限。
这是示例
嗨，这里是为 android M 设置权限的几个步骤，请记住，您也应该在清单文件中声明相同的权限。
步骤 1. 声明全局变量：
public final int REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS = 1;
//requests for runtime time permissions
String CAMERA_PERMISSION = android.Manifest.permission.CAMERA;
String READ_EXTERNAL_STORAGE_PERMISSION = android.Manifest.permission.READ_EXTERNAL_STORAGE;
String WRITE_EXTERNAL_STORAGE_PERMISSION = android.Manifest.permission.WRITE_EXTERNAL_STORAGE;
// for security permissions
@DialogType
private int mDialogType;
private String mRequestPermissions = "We are requesting the camera and Gallery permission as it is absolutely necessary for the app to perform it\'s functionality.\nPlease select \"Grant Permission\" to try again and \"Cancel \" to exit the application.";
private String mRequsetSettings = "You have rejected the camera and Gallery permission for the application. As it is absolutely necessary for the app to perform you need to enable it in the settings of your device.\nPlease select \"Go to settings\" to go to application settings in your device and \"Cancel \" to exit the application.";
private String mGrantPermissions = "Grant Permissions";
private String mCancel = "Cancel";
private String mGoToSettings = "Go To Settings";
private String mPermissionRejectWarning = "Cannot Proceed Without Permissions</string>
<string name="explanation_permission_location_request">We are requesting the location permission as it is necessary for the app to perform search functionality properly.\nPlease select \"Grant Permission\" to try again and \"Cancel \" to deny permission.";
// 像这样创建对话框。
// type of dialog opened in MainActivity
@IntDef({DialogType.DIALOG_DENY, DialogType.DIALOG_NEVER_ASK})
@Retention(RetentionPolicy.SOURCE)
@interface DialogType {
int DIALOG_DENY = 0, DIALOG_NEVER_ASK = 1;
}
第 2 步。在您的主要活动中使用此代码
@TargetApi(Build.VERSION_CODES.M)
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode) {
case REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS:
if (grantResults[0] == PackageManager.PERMISSION_GRANTED && grantResults[1] == PackageManager.PERMISSION_GRANTED && grantResults[2] == PackageManager.PERMISSION_GRANTED) {
// Call your camera here.
} else {
boolean showRationale1 = shouldShowRequestPermissionRationale(CAMERA_PERMISSION);
boolean showRationale2 = shouldShowRequestPermissionRationale(READ_EXTERNAL_STORAGE_PERMISSION);
boolean showRationale3 = shouldShowRequestPermissionRationale(WRITE_EXTERNAL_STORAGE_PERMISSION);
if (showRationale1 && showRationale2 && showRationale3) {
//explain to user why we need the permissions
mDialogType = ValueConstants.DialogType.DIALOG_DENY;
// Show dialog with
openAlertDialog(mRequestPermissions, mGrantPermissions, mCancel, this, MyActivity.this);
} else {
//explain to user why we need the permissions and ask him to go to settings to enable it
mDialogType = ValueConstants.DialogType.DIALOG_NEVER_ASK;
openAlertDialog(mRequsetSettings, mGoToSettings, mCancel, this, MyActivity.this);
}
}
break;
default:
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
//check for camera and storage access permissions
@TargetApi(Build.VERSION_CODES.M)
private void checkMultiplePermissions(int permissionCode, Context context) {
String[] PERMISSIONS = {CAMERA_PERMISSION, READ_EXTERNAL_STORAGE_PERMISSION, WRITE_EXTERNAL_STORAGE_PERMISSION};
if (!hasPermissions(context, PERMISSIONS)) {
ActivityCompat.requestPermissions((Activity) context, PERMISSIONS, permissionCode);
} else {
// Open your camera here.
}
}
private boolean hasPermissions(Context context, String... permissions) {
if (android.os.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;
}
步骤 3. 在您的 oncreate 方法中调用此方法，
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
checkMultiplePermissions(REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS, MyActivity.this);
} else {
// Open your camera here.
}
步骤 4. 权限拒绝对话框
public static void openAlertDialog(String message, String positiveBtnText, String negativeBtnText,
final OnDialogButtonClickListener listener,Context mContext) {
AlertDialog.Builder builder = new AlertDialog.Builder(mContext, R.style.AlertDialogCustom);
builder.setPositiveButton(positiveBtnText, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
listener.onPositiveButtonClicked();
}
});
builder.setPositiveButton(positiveBtnText, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
listener.onNegativeButtonClicked();
}
});
builder.setTitle(mContext.getResources().getString(R.string.app_name));
builder.setMessage(message);
builder.setIcon(android.R.drawable.ic_dialog_alert);
builder.setCancelable(false);
builder.create().show();
}
// 创建这个接口
public interface OnDialogButtonClickListener {
void onPositiveButtonClicked();
void onNegativeButtonClicked();
}
并在您需要添加权限的活动中实现此功能。
@Override
public void onPositiveButtonClicked() {
switch (mDialogType) {
case ValueConstants.DialogType.DIALOG_DENY:
checkMultiplePermissions(REQUEST_CODE_ASK_MULTIPLE_PERMISSIONS, MyActivity.this);
break;
case ValueConstants.DialogType.DIALOG_NEVER_ASK:
redirectToAppSettings(MyActivity.this);
break;
}
}
@Override
public void onNegativeButtonClicked() {
}
以及您可以从此处调用的任何权限以及您可以在覆盖方法 onRequestPermissionsResult 中获得的每个结果。
谢谢你
希望这会帮助你（Y）。
