相机
public static boolean isCameraUseable() {
boolean canUse =true;
Camera mCamera =null;
try{
mCamera = Camera.open();
// setParameters 是针对魅族MX5。MX5通过Camera.open()拿到的Camera对象不为null
Camera.Parameters mParameters = mCamera.getParameters();
mCamera.setParameters(mParameters);
}catch(Exception e) {
canUse =false;
}
if(mCamera !=null) {
mCamera.release();
}
return canUse;
}
//另一种方法
@TargetApi(Build.VERSION_CODES.M)
private void getPermission() {
if (ContextCompat.checkSelfPermission(UploadPicActivity.this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
//申请CAMERA的权限
requestPermissions(new String[]{Manifest.permission.CAMERA}, MY_PERMISSIONS_REQUEST_READ_CONTACTS);
} else {
photo();
pop.dismiss();
ll_popup.clearAnimation();
}
}
权限返回结果
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_READ_CONTACTS:
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
photo();
} else {
Toast.makeText(UploadPicActivity.this, "请打开相机权限", Toast.LENGTH_LONG).show();
}
break;
}
}
//一个工具类
import android.Manifest;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Build;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.Fragment;
import android.support.v4.content.ContextCompat;
import android.util.Log;
import java.util.ArrayList;
import java.util.List;
/**
* Created by lzq on 2016/6/30.
*/
public class PermissionUtils {
static Activity context;
public PermissionUtils(Activity context) {
this.context=context;
}
public static final int MY_PERMISSIONS_REQUEST_CALL_PHONE=200;
public static void needPermission(int requestCode)
{
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M){
return;
}
requestAllPermissions(requestCode);
}
private static void requestAllPermissions( int requestCode)
{
ActivityCompat.requestPermissions(context,
new String[]{Manifest.permission.CALL_PHONE, Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.CAMERA, Manifest.permission.READ_CONTACTS, Manifest.permission.GET_ACCOUNTS, Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_CALL_PHONE);
}
private static boolean requesCallPhonePermissions( int requestCode)
{
if (ContextCompat.checkSelfPermission(context,
Manifest.permission.CALL_PHONE)
!= PackageManager.PERMISSION_GRANTED)
{//没有权限
ActivityCompat.requestPermissions(context,
new String[]{Manifest.permission.CALL_PHONE},
MY_PERMISSIONS_REQUEST_CALL_PHONE);
return false;
} else
{
return true;
}
}
private static boolean requestReadSDCardPermissions( int requestCode)
{
if (ContextCompat.checkSelfPermission(context,
Manifest.permission.READ_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED)
{//没有权限
ActivityCompat.requestPermissions(context,
new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
MY_PERMISSIONS_REQUEST_CALL_PHONE);
return false;
} else
{
return true;
}
}
private static boolean requestCamerPermissions( int requestCode)
{
if (ContextCompat.checkSelfPermission(context,
Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED)
{//没有权限
ActivityCompat.requestPermissions(context,
new String[]{Manifest.permission.CAMERA},
MY_PERMISSIONS_REQUEST_CALL_PHONE);
return false;
} else
{
return true;
}
}
private static boolean requestReadConstantPermissions( int requestCode)
{
if (ContextCompat.checkSelfPermission(context,
Manifest.permission.READ_CONTACTS)
!= PackageManager.PERMISSION_GRANTED)
{//没有权限
ActivityCompat.requestPermissions(context,
new String[]{Manifest.permission.READ_CONTACTS},
MY_PERMISSIONS_REQUEST_CALL_PHONE);
return false;
} else
{
return true;
}
}
private static boolean requestGET_ACCOUNTSPermissions( int requestCode)
{
if (ContextCompat.checkSelfPermission(context,
Manifest.permission.GET_ACCOUNTS)
!= PackageManager.PERMISSION_GRANTED)
{//没有权限
ActivityCompat.requestPermissions(context,
new String[]{Manifest.permission.GET_ACCOUNTS},
MY_PERMISSIONS_REQUEST_CALL_PHONE);
return false;
} else
{
return true;
}
}
private static boolean requestLocationPermissions( int requestCode)
{
if (ContextCompat.checkSelfPermission(context,
Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED)
{//没有权限
ActivityCompat.requestPermissions(context,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_CALL_PHONE);
return false;
} else
{
return true;
}
}
}
我是在app第一次进入的时候，先判断android的版本，如果大于6.0，不管用户是否给与权限，都调用申请常用权限，防止因为用户不给于权限而导致崩溃，如:
存储，电话，相机，通讯录，位置等。防止用户
if (Build.VERSION.SDK_INT>= Build.VERSION_CODES.M){
new PermissionUtils(this).needPermission(200);
}
然后在接下来的需要调用这些权限时调用相对应的方法，如打电话时调用
requesCallPhonePermissions（200），参数随便传入。注意：此处的200 要与onRequestPermissionsResult中的参数requestCode一致。
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case 200: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// contacts-related task you need to do.
//同意给与权限 可以再此处调用拍照
Log.i("用户同意权限", "user granted the permission!");
} else {
// permission denied, boo! Disable the
// f用户不同意 可以给一些友好的提示
Log.i("用户不同意权限", "user denied the permission!");
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
} 
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