权限检查一般放在APP的入口,比如说闪屏页splashactivity中或者baseapplication中。
其中需要两个类,一个是PermissionChecker,一个是PermissionsActivity。第一个是用来检测当前是否已经获取到了申请的权限,如果没有则跳转到权限申请类PermissionsActivity中进行开启所需权限。
直接上代码吧,第一个PermissionChecker
package tv.talkweb.daddygowhere.util.permissioncheck;
import android.content.Context;
import android.content.pm.PackageManager;
import android.support.v4.content.ContextCompat;
/**
* 检查权限的工具类
* Created by su on 2017/1/22.
*/
public class PermissionsChecker {
private final Context mContext;
public PermissionsChecker(Context context) {
mContext = context.getApplicationContext();
}
// 判断权限集合
public boolean lacksPermissions(String... permissions) {
for (String permission : permissions) {
if (lacksPermission(permission)) {
return true;
}
}
return false;
}
// 判断是否缺少权限
private boolean lacksPermission(String permission) {
return ContextCompat.checkSelfPermission(mContext, permission) ==
PackageManager.PERMISSION_DENIED;
}
}
package tv.talkweb.daddygowhere.util.permissioncheck;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Settings;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import tv.talkweb.daddygowhere.base.BaseActivity;
import tv.talkweb.daddygowhere.base.BaseApplication;
import tv.talkweb.dadwheregoing.R;
/**
* 权限获取页面
* Created by su on 2017/1/22.
*/
public class PermissionsActivity extends BaseActivity {
public static final int PERMISSIONS_GRANTED = 0; // 权限授权
public static final int PERMISSIONS_DENIED = 1; // 权限拒绝
private static final int PERMISSION_REQUEST_CODE = 0; // 系统权限管理页面的参数
private static final String EXTRA_PERMISSIONS =
"me.chunyu.clwang.permission.extra_permission"; // 权限参数
private static final String PACKAGE_URL_SCHEME = "package:"; // 方案
private PermissionsChecker mChecker; // 权限检测器
private boolean isRequireCheck; // 是否需要系统权限检测
// 启动当前权限页面的公开接口
public static void startActivityForResult(Activity activity, int requestCode, String... permissions) {
Intent intent = new Intent(activity, PermissionsActivity.class);
intent.putExtra(EXTRA_PERMISSIONS, permissions);
ActivityCompat.startActivityForResult(activity, intent, requestCode, null);
}
@Override protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getIntent() == null || !getIntent().hasExtra(EXTRA_PERMISSIONS)) {
throw new RuntimeException("PermissionsActivity需要使用静态startActivityForResult方法启动!");
}
setContentView(R.layout.activity_permissions);
mChecker = new PermissionsChecker(this);
isRequireCheck = true;
}
@Override protected void onResume() {
super.onResume();
if (isRequireCheck) {
String[] permissions = getPermissions();
if (mChecker.lacksPermissions(permissions)) {
requestPermissions(permissions); // 请求权限
} else {
allPermissionsGranted(); // 全部权限都已获取
}
} else {
isRequireCheck = true;
}
}
// 返回传递的权限参数
private String[] getPermissions() {
return getIntent().getStringArrayExtra(EXTRA_PERMISSIONS);
}
// 请求权限兼容低版本
private void requestPermissions(String... permissions) {
ActivityCompat.requestPermissions(this, permissions, PERMISSION_REQUEST_CODE);
}
// 全部权限均已获取
private void allPermissionsGranted() {
setResult(PERMISSIONS_GRANTED);
finish();
}
/**
* 用户权限处理,
* 如果全部获取, 则直接过.
* 如果权限缺失, 则提示Dialog.
*
* @param requestCode 请求码
* @param permissions 权限
* @param grantResults 结果
*/
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
if (requestCode == PERMISSION_REQUEST_CODE && hasAllPermissionsGranted(grantResults)) {
isRequireCheck = true;
allPermissionsGranted();
} else {
isRequireCheck = false;
showMissingPermissionDialog();
}
}
// 含有全部的权限
private boolean hasAllPermissionsGranted(@NonNull int[] grantResults) {
for (int grantResult : grantResults) {
if (grantResult == PackageManager.PERMISSION_DENIED) {
return false;
}
}
return true;
}
// 显示缺失权限提示
private void showMissingPermissionDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(PermissionsActivity.this);
builder.setTitle(R.string.help);
builder.setMessage(R.string.string_help_text);
// 拒绝, 退出应用
builder.setNegativeButton(R.string.quit, new DialogInterface.OnClickListener() {
@Override public void onClick(DialogInterface dialog, int which) {
setResult(PERMISSIONS_DENIED);
BaseApplication.getInstance().exit();
}
});
builder.setPositiveButton(R.string.settings, new DialogInterface.OnClickListener() {
@Override public void onClick(DialogInterface dialog, int which) {
startAppSettings();
}
});
builder.show();
}
// 启动应用的设置
private void startAppSettings() {
Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
intent.setData(Uri.parse(PACKAGE_URL_SCHEME + getPackageName()));
startActivity(intent);
}
}
布局文件activity_permissions
strings.xml文件添加代码
帮助
当前缺少必要权限,请点击“设置”-“权限”打开所有权限。
退出
设置
//添加Activity到容器中
public void addActivity(Activity activity) {
activityList.add(activity);
}
//遍历所有Activity并finish
public void exit() {
for (Activity activity : activityList) {
activity.finish();
}
System.exit(0);
}
//退出单个Activity
public void exit(Activity activity) {
activity.finish();
activityList.remove(activity);
}
具体使用:
列出所有需要启动的权限
创建权限检测器成员变量
在onCreate中初始化成员变量
在onResume中检测并处理缺少的权限
public class ActivitySplash extends BaseActivity implements UmengUtil.MyUmengOnlineConfigListener{
private Context context;
private CountdownView splashCircleView;
// 所需的全部权限
static final String[] PERMISSIONS = new String[]{
Manifest.permission.RECORD_AUDIO,
Manifest.permission.MODIFY_AUDIO_SETTINGS,
Manifest.permission.READ_PHONE_STATE,
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE,
Manifest.permission.ACCESS_NETWORK_STATE,
Manifest.permission.ACCESS_WIFI_STATE,
Manifest.permission.ACCESS_FINE_LOCATION
};
private static final int REQUEST_CODE = 0; // 请求码
private PermissionsChecker mPermissionsChecker; // 权限检测器
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.context = this;
mPermissionsChecker = new PermissionsChecker(this);
protected void onResume() {
super.onResume();
// 缺少权限时, 进入权限配置页面
if (Build.VERSION.SDK_INT > 22){
if (mPermissionsChecker.lacksPermissions(PERMISSIONS)) {
startPermissionsActivity();
}
}
}
private void startPermissionsActivity() {
PermissionsActivity.startActivityForResult(this, REQUEST_CODE, PERMISSIONS);
}