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; } } 第二个是PermissionsActivity: 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
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> </LinearLayout>strings.xml文件添加代码 <string name="help">帮助</string> <string name="string_help_text">当前缺少必要权限,请点击“设置”-“权限”打开所有权限。</string> <string name="quit">退出</string> <string name="settings">设置</string> 在baseapplication中我使用了统一管理所有activity的用法,大家可以借鉴也可以用自己的一套处理方法 //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); }