Android开发之6.0动态权限工具类(高德地图官方扣出来的)附源码

感觉这个权限申请类写的比较好。

使用方法：activity直接继承就可以了。

看下mainactivity.java

package com.qfy.permissiondemo;

import android.os.Bundle;

public class MainActivity extends CheckPermissionsActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

 

再来看下申请权限的CheckPermissionsActivity.java

 

/**
 *
 */
package com.qfy.xiayiyemap;

import android.Manifest;
import android.annotation.TargetApi;
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.Build;
import android.provider.Settings;
import android.view.KeyEvent;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

/**
 * 继承了Activity，实现Android6.0的运行时权限检测
 * 需要进行运行时权限检测的Activity可以继承这个类
 *
 * @author hongming.wang
 * @创建时间：2016年5月27日 下午3:01:31
 * @项目名称： AMapLocationDemo
 * @文件名称：PermissionsChecker.java
 * @类型名称：PermissionsChecker
 * @since 2.5.0
 */
public class CheckPermissionsActivity extends Activity {
    /**
     * 需要进行检测的权限数组
     */
    protected String[] needPermissions = {
            Manifest.permission.ACCESS_COARSE_LOCATION,
            Manifest.permission.ACCESS_FINE_LOCATION,
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
            Manifest.permission.READ_EXTERNAL_STORAGE,
            Manifest.permission.READ_PHONE_STATE
    };

    private static final int PERMISSON_REQUESTCODE = 0;

    /**
     * 判断是否需要检测，防止不停的弹框
     */
    private boolean isNeedCheck = true;

    @Override
    protected void onResume() {
        super.onResume();
        if (Build.VERSION.SDK_INT >= 23
                && getApplicationInfo().targetSdkVersion >= 23) {
            if (isNeedCheck) {
                checkPermissions(needPermissions);
            }
        }
    }

    /**
     * @param permissions
     * @since 2.5.0
     */
    private void checkPermissions(String... permissions) {
        try {
            if (Build.VERSION.SDK_INT >= 23
                    && getApplicationInfo().targetSdkVersion >= 23) {
                List<String> needRequestPermissonList = findDeniedPermissions(permissions);
                if (null != needRequestPermissonList
                        && needRequestPermissonList.size() > 0) {
                    String[] array = needRequestPermissonList.toArray(new String[needRequestPermissonList.size()]);
                    Method method = getClass().getMethod("requestPermissions", new Class[]{String[].class, int.class});

                    method.invoke(this, array, PERMISSON_REQUESTCODE);
                }
            }
        } catch (Throwable e) {
        }
    }

    /**
     * 获取权限集中需要申请权限的列表
     *
     * @param permissions
     * @return
     * @since 2.5.0
     */
    private List<String> findDeniedPermissions(String[] permissions) {
        List<String> needRequestPermissonList = new ArrayList<String>();
        if (Build.VERSION.SDK_INT >= 23
                && getApplicationInfo().targetSdkVersion >= 23) {
            try {
                for (String perm : permissions) {
                    Method checkSelfMethod = getClass().getMethod("checkSelfPermission", String.class);
                    Method shouldShowRequestPermissionRationaleMethod = getClass().getMethod("shouldShowRequestPermissionRationale",
                            String.class);
                    if ((Integer) checkSelfMethod.invoke(this, perm) != PackageManager.PERMISSION_GRANTED
                            || (Boolean) shouldShowRequestPermissionRationaleMethod.invoke(this, perm)) {
                        needRequestPermissonList.add(perm);
                    }
                }
            } catch (Throwable e) {

            }
        }
        return needRequestPermissonList;
    }

    /**
     * 检测是否所有的权限都已经授权
     *
     * @param grantResults
     * @return
     * @since 2.5.0
     */
    private boolean verifyPermissions(int[] grantResults) {
        for (int result : grantResults) {
            if (result != PackageManager.PERMISSION_GRANTED) {
                return false;
            }
        }
        return true;
    }

    @TargetApi(23)
    public void onRequestPermissionsResult(int requestCode,
                                           String[] permissions, int[] paramArrayOfInt) {
        if (requestCode == PERMISSON_REQUESTCODE) {
            if (!verifyPermissions(paramArrayOfInt)) {
                showMissingPermissionDialog();
                isNeedCheck = false;
            }
        }
    }

    /**
     * 显示提示信息
     *
     * @since 2.5.0
     */
    private void showMissingPermissionDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(R.string.notifyTitle);
        builder.setMessage(R.string.notifyMsg);

        // 拒绝, 退出应用
        builder.setNegativeButton(R.string.cancel,
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        finish();
                    }
                });

        builder.setPositiveButton(R.string.setting,
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        startAppSettings();
                    }
                });

        builder.setCancelable(false);

        builder.show();
    }

    /**
     * 启动应用的设置
     *
     * @since 2.5.0
     */
    private void startAppSettings() {
        Intent intent = new Intent(
                Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
        intent.setData(Uri.parse("package:" + getPackageName()));
        startActivity(intent);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            this.finish();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

}

这个类还有个好处，就是不需要继承appcompatActivity，如果写demo用到权限申请这个类无疑是最好的选择！因为不需要继承appcompatActivity类可以让apk包非常小。如下图；

如果看不懂，我直接提供一份源码。大佬勿喷。

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