com.vv.androidreview.ui.activites.PermissionsActivity.java Source code

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Here is the source code for com.vv.androidreview.ui.activites.PermissionsActivity.java

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/*
 * Copyright (c) 2016. Vv <envyfan@qq.com><http://www.v-sounds.com/>
 *
 * This file is part of AndroidReview (Android??)
 *
 * AndroidReview is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 *  AndroidReview is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 * along with AndroidReview.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.vv.androidreview.ui.activites;

import android.app.Activity;
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 android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;

import com.vv.androidreview.R;
import com.vv.androidreview.utils.PermissionsChecker;

/**
 * ????
 * <p/>
 * Created by wangchenlong on 16/1/26.
 */
public class PermissionsActivity extends AppCompatActivity {

    public static final int PERMISSIONS_GRANTED = 0; // ???
    public static final int PERMISSIONS_DENIED = 1; // ???

    private static final int PERMISSION_REQUEST_CODE = 0; // ?????
    private static final String EXTRA_PERMISSIONS = "extra_permission"; // ???
    private static final String PACKAGE_URL_SCHEME = "package:"; // 

    private PermissionsChecker mChecker; // ??
    private boolean isRequireCheck; // ????, ????

    // ??????
    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???startActivityForResult?!");
        }
        View view = new View(this);
        view.setBackgroundColor(getResources().getColor(R.color.theme_color_level2));
        ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.MATCH_PARENT);
        view.setLayoutParams(lp);
        setContentView(view);

        mChecker = new PermissionsChecker(this);
        isRequireCheck = true;
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (isRequireCheck) {
            String[] permissions = getPermissions();
            if (mChecker.lacksPermissions(permissions)) {
                requestPermissions(permissions); // ??
            } else {
                allPermissionsGranted(); // ???
            }
        } else {
            isRequireCheck = true;
        }
    }

    // ???
    private String[] getPermissions() {
        return getIntent().getStringArrayExtra(EXTRA_PERMISSIONS);
    }

    // ??
    private void requestPermissions(String... permissions) {
        ActivityCompat.requestPermissions(this, permissions, PERMISSION_REQUEST_CODE);
    }

    // ????
    private void allPermissionsGranted() {
        setResult(PERMISSIONS_GRANTED);
        finish();
    }

    /**
     * ???,
     * ?, .
     * ??, ??Dialog.
     *
     * @param requestCode  ?
     * @param permissions  ??
     * @param grantResults 
     */
    @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();
        }
    }

    // ???
    private boolean hasAllPermissionsGranted(@NonNull int[] grantResults) {
        for (int grantResult : grantResults) {
            if (grantResult == PackageManager.PERMISSION_DENIED) {
                return false;
            }
        }
        return true;
    }

    // ????
    private void showMissingPermissionDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(PermissionsActivity.this);
        builder.setTitle(R.string.help);
        builder.setMessage(R.string.string_help_text);

        // ?, 
        builder.setNegativeButton(R.string.quit, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                setResult(PERMISSIONS_DENIED);
                finish();
            }
        });

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

        builder.setCancelable(false);

        builder.show();
    }

    // ?
    private void startAppSettings() {
        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
        intent.setData(Uri.parse(PACKAGE_URL_SCHEME + getPackageName()));
        startActivity(intent);
    }
}