Android总结

Android总结

原文的作者写的很好，推荐前往阅读，本片记录纯粹是为了方便自己之后复习的时候使用观看

目录

一、修改阿里云仓库

外层build.gradle
buildscript {
    repositories {
        google()
        mavenCentral()
        maven {url 'https://developer.huawei.com/repo/'}
        maven { url 'https://maven.aliyun.com/repository/public' }
        maven { url 'https://maven.aliyun.com/repository/google' }
        maven { url 'https://maven.aliyun.com/repository/gradle-plugin' }
    }
    dependencies {
        classpath "com.android.tools.build:gradle:7.0.4"

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

二、Android引用XUI

1.官网地址
https://github.com/xuexiangjys/XUI/wiki
2. 整合方法
2.1 根目录settings.gradle的dependencyResolutionManagement
dependencyResolutionManagement {
    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
    repositories {
        google()
        mavenCentral()
        maven { url "https://jitpack.io" }
    }
}
2.2 androidx项目中添加依赖
implementation 'com.github.xuexiangjys:XUI:1.1.9'
implementation 'androidx.appcompat:appcompat:1.3.1'
implementation 'androidx.recyclerview:recyclerview:1.2.1'
implementation 'com.google.android.material:material:1.4.0'
implementation 'com.github.bumptech.glide:glide:4.12.0'
2.3 修改values中的themes.xml
<resources xmlns:tools="http://schemas.android.com/tools">
    <!-- Base application theme. -->
    <style name="Theme.IT_Application" parent="XUITheme.Phone">//将此处修改为所需的类型
        <!-- Primary brand color. -->
        <item name="colorPrimary">@color/purple_500</item>
        <item name="colorPrimaryVariant">@color/purple_700</item>
        <item name="colorOnPrimary">@color/white</item>
        <!-- Secondary brand color. -->
        <item name="colorSecondary">@color/teal_200</item>
        <item name="colorSecondaryVariant">@color/teal_700</item>
        <item name="colorOnSecondary">@color/black</item>
        <!-- Status bar color. -->
        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
        <!-- Customize your theme here. -->
    </style>
</resources>
2.4 创建MyApplication类
public class MyApplication extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        XUI.init(this); //初始化UI框架
        XUI.debug(true);  //开启UI框架调试日志
    }
}
2.5 AndroidManifest.xml中注册
<application
        android:name=".MyApplication" //添加到此处
        android:allowBackup="true"
        android:icon="@mipmap/logo"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.IT_Application">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

三、自定义可左右及上下滑动的表格

1. 自定义SyncHorizontalScrollView
public class SyncHorizontalScrollView extends HorizontalScrollView {
    private View mView;
    public SyncHorizontalScrollView(Context context) {
        super(context);
    }
    public SyncHorizontalScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
    public SyncHorizontalScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
        super.onScrollChanged(l, t, oldl, oldt);
        if (mView != null) {
            mView.scrollTo(l, t);
        }
    }
    public void setScrollView(View view) {
        mView = view;
    }
}
2. 自定义NoscrollListView
public class NoscrollListView extends ListView {
    public NoscrollListView(Context context) {
        super(context);
    }
    public NoscrollListView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
    public NoscrollListView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);
    }
}
3. 页面Activity
public class ListActivity extends AppCompatActivity {

    private NoscrollListView mLeft;
    private LeftAdapter mLeftAdapter;

    private NoscrollListView mData;
    private DataAdapter mDataAdapter;

    private SyncHorizontalScrollView mHeaderHorizontal;
    private SyncHorizontalScrollView mDataHorizontal;

    private List<Label> mListData;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_list);
        TitleBar mTitleBar= findViewById(R.id.listTitle);
        //监听返回按键
        mTitleBar.setLeftClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                finish();
                if (mListData!=null){
                    mListData.clear();
                }
            }
        });

        initView();
    }

    private void initView(){
        mLeft = (NoscrollListView) findViewById(R.id.lv_left);
        mData = (NoscrollListView) findViewById(R.id.lv_data);
        mDataHorizontal = (SyncHorizontalScrollView) findViewById(R.id.data_horizontal);
        mHeaderHorizontal = (SyncHorizontalScrollView) findViewById(R.id.header_horizontal);

        mDataHorizontal.setScrollView(mHeaderHorizontal);
        mHeaderHorizontal.setScrollView(mDataHorizontal);
        //获取数据
        LabelService LabelService = new LabelService();
        mListData = LabelService.queryAll();

        mLeftAdapter= new LeftAdapter();
        mLeft.setAdapter(mLeftAdapter);

        mDataAdapter = new DataAdapter();
        mData.setAdapter(mDataAdapter);
    }

    class LeftAdapter extends BaseAdapter {

        @Override
        public int getCount() {
            if (mListData!=null){
                return mListData.size();
            }
            return 0;
        }

        @Override
        public Object getItem(int position) {
            return mListData.get(position);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder = null;
            if (convertView == null) {
                holder = new ViewHolder();
                convertView = LayoutInflater.from(ListActivity.this).inflate(R.layout.item_left, null);
                holder.tvLeft = (TextView) convertView.findViewById(R.id.tv_left);
                convertView.setTag(holder);
            } else {
                holder = (ViewHolder) convertView.getTag();
            }

            holder.tvLeft.setText("第" + (position+1)+ "行");

            return convertView;
        }

        class ViewHolder {
            TextView tvLeft;
        }
    }

    class DataAdapter extends BaseAdapter {

        @Override
        public int getCount() {
            if (mListData!=null){
                return mListData.size();
            }
            return 0;
        }

        @Override
        public Object getItem(int position) {
            return mListData.get(position);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder = null;
            if(convertView == null){
                holder = new ViewHolder();
                convertView = LayoutInflater.from(ListActivity.this).inflate(R.layout.item_data, null);
                holder.equipment = convertView.findViewById(R.id.tv_data_equipmentName);
                holder.equipment.setText(mListData.get(position).getEquipment());

                holder.dept = convertView.findViewById(R.id.tv_data_dept);
                holder.dept.setText(mListData.get(position).getDept());

                holder.person = convertView.findViewById(R.id.tv_data_person);
                holder.person.setText(mListData.get(position).getPerson());

                holder.assetNumber = convertView.findViewById(R.id.tv_data_assetNumber);
                holder.assetNumber.setText(mListData.get(position).getAssetNumber());

                holder.assetModel = convertView.findViewById(R.id.tv_data_assetModel);
                holder.assetModel.setText(mListData.get(position).getAssetModel());

                holder.secretLevel = convertView.findViewById(R.id.tv_data_secretLevel);
                holder.secretLevel.setText(mListData.get(position).getSecretLevel());

                holder.purpose = convertView.findViewById(R.id.tv_data_purpose);
                holder.purpose.setText(mListData.get(position).getPurpose());

                holder.mac = convertView.findViewById(R.id.tv_data_mac);
                holder.mac.setText(mListData.get(position).getMac());

                holder.s_n = convertView.findViewById(R.id.tv_data_s_n);
                holder.s_n.setText(mListData.get(position).getS_n());

                holder.phone = convertView.findViewById(R.id.tv_data_phone);
                holder.phone.setText(mListData.get(position).getPhone());

                convertView.setTag(holder);
            }else{
                holder = (ViewHolder) convertView.getTag();
            }

            return convertView;
        }

        class ViewHolder {
            TextView equipment;
            TextView dept;
            TextView person;
            TextView assetNumber;
            TextView assetModel;
            TextView purpose;
            TextView secretLevel;
            TextView mac;
            TextView s_n;
            TextView phone;
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
    }

}
4. activity.xml
<LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:background="@color/blue_start"
        android:orientation="horizontal">

        <LinearLayout
            android:layout_width="0dp"
            android:layout_height="50dp"
            android:layout_weight="1"
            android:orientation="vertical"></LinearLayout>

        <View
            android:layout_width="1px"
            android:layout_height="50dp"
            android:background="#cccccc"/>

        <LinearLayout
            android:id="@+id/lin_header_content"
            android:layout_width="0dp"
            android:layout_height="50dp"
            android:layout_weight="3"
            android:background="@color/blue_start"
            android:orientation="vertical">

            <com.example.it_application.SyncHorizontalScrollView
                android:id="@+id/header_horizontal"
                android:layout_width="match_parent"
                android:layout_height="50dp"
                android:overScrollMode="never"
                android:scrollbars="none">

                <LinearLayout
                    android:id="@+id/lin_year_title"
                    android:layout_width="match_parent"
                    android:layout_height="50dp"
                    android:orientation="horizontal">

                    <TextView
                        android:layout_width="100dp"
                        android:layout_height="50dp"
                        android:layout_gravity="center"
                        android:gravity="center"
                        android:text="@string/equipmentName"/>

                    <View
                        android:layout_width="1px"
                        android:layout_height="50dp"
                        android:background="#cccccc"/>

                    <TextView
                        android:layout_width="100dp"
                        android:layout_height="50dp"
                        android:layout_gravity="center"
                        android:gravity="center"
                        android:text="@string/dept"/>

                    <View
                        android:layout_width="1px"
                        android:layout_height="50dp"
                        android:background="#cccccc"/>

                    <TextView
                        android:layout_width="100dp"
                        android:layout_height="50dp"
                        android:layout_gravity="center"
                        android:gravity="center"
                        android:text="@string/person"/>

                    <View
                        android:layout_width="1px"
                        android:layout_height="50dp"
                        android:background="#cccccc"/>

                    <TextView
                        android:layout_width="100dp"
                        android:layout_height="50dp"
                        android:layout_gravity="center"
                        android:gravity="center"
                        android:text="@string/assetNumber"/>

                    <View
                        android:layout_width="1px"
                        android:layout_height="50dp"
                        android:background="#cccccc"/>

                    <TextView
                        android:layout_width="100dp"
                        android:layout_height="50dp"
                        android:layout_gravity="center"
                        android:gravity="center"
                        android:text="@string/assetModel"/>

                    <View
                        android:layout_width="1px"
                        android:layout_height="50dp"
                        android:background="#cccccc"/>

                    <TextView
                        android:layout_width="100dp"
                        android:layout_height="50dp"
                        android:layout_gravity="center"
                        android:gravity="center"
                        android:text="@string/secretLevel"/>

                    <View
                        android:layout_width="1px"
                        android:layout_height="50dp"
                        android:background="#cccccc"/>

                    <TextView
                        android:layout_width="100dp"
                        android:layout_height="50dp"
                        android:layout_gravity="center"
                        android:gravity="center"
                        android:text="@string/purpose"/>

                    <View
                        android:layout_width="1px"
                        android:layout_height="50dp"
                        android:background="#cccccc"/>

                    <TextView
                        android:layout_width="100dp"
                        android:layout_height="50dp"
                        android:layout_gravity="center"
                        android:gravity="center"
                        android:text="@string/mac"/>

                    <View
                        android:layout_width="1px"
                        android:layout_height="50dp"
                        android:background="#cccccc"/>

                    <TextView
                        android:layout_width="100dp"
                        android:layout_height="50dp"
                        android:layout_gravity="center"
                        android:gravity="center"
                        android:text="@string/s_n"/>

                    <View
                        android:layout_width="1px"
                        android:layout_height="50dp"
                        android:background="#cccccc"/>

                    <TextView
                        android:layout_width="100dp"
                        android:layout_height="50dp"
                        android:layout_gravity="center"
                        android:gravity="center"
                        android:text="@string/phone"/>
                    <View
                        android:layout_width="1px"
                        android:layout_height="50dp"
                        android:background="#cccccc"/>
                </LinearLayout>
            </com.example.it_application.SyncHorizontalScrollView>
        </LinearLayout>
    </LinearLayout>

    <View
        android:layout_width="match_parent"
        android:layout_height="1px"
        android:background="#cccccc"/>

    <ScrollView
        android:id="@+id/scroll_content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:overScrollMode="never"
        android:scrollbars="none">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_alignParentTop="true"
            android:orientation="horizontal">

            <com.example.it_application.NoscrollListView
                android:id="@+id/lv_left"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:overScrollMode="never"
                android:scrollbars="none"/>

            <View
                android:layout_width="1px"
                android:layout_height="match_parent"
                android:background="#cccccc"/>

            <LinearLayout
                android:id="@+id/lin_data_content"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="3"
                android:orientation="vertical">

                <com.example.it_application.SyncHorizontalScrollView
                    android:id="@+id/data_horizontal"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:overScrollMode="never"
                    android:scrollbars="none">

                    <com.example.it_application.NoscrollListView
                        android:id="@+id/lv_data"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:overScrollMode="never"
                        android:scrollbars="none"/>
                </com.example.it_application.SyncHorizontalScrollView>
            </LinearLayout>
        </LinearLayout>

    </ScrollView>
5. 左侧行数列item_left.xml
<?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
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="vertical">

        <TextView
            android:id="@+id/tv_left"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:gravity="center"
            android:background="@color/blue_start"
            android:text="第1行"/>
    </LinearLayout>
</LinearLayout>
6. 内容item_data.xml
<?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
        android:id="@+id/lin_content"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/tv_data_equipmentName"
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:layout_gravity="center"
            android:gravity="center" />

        <View
            android:layout_width="1px"
            android:layout_height="50dp"
            android:background="#cccccc"/>

        <TextView
            android:id="@+id/tv_data_dept"
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:layout_gravity="center"
            android:gravity="center" />

        <View
            android:layout_width="1px"
            android:layout_height="50dp"
            android:background="#cccccc"/>

        <TextView
            android:id="@+id/tv_data_person"
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:layout_gravity="center"
            android:gravity="center" />

        <View
            android:layout_width="1px"
            android:layout_height="50dp"
            android:background="#cccccc"/>

        <TextView
            android:id="@+id/tv_data_assetNumber"
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:layout_gravity="center"
            android:gravity="center" />

        <View
            android:layout_width="1px"
            android:layout_height="50dp"
            android:background="#cccccc"/>

        <TextView
            android:id="@+id/tv_data_assetModel"
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:layout_gravity="center"
            android:gravity="center" />

        <View
            android:layout_width="1px"
            android:layout_height="50dp"
            android:background="#cccccc"/>

        <TextView
            android:id="@+id/tv_data_secretLevel"
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:layout_gravity="center"
            android:gravity="center" />

        <View
            android:layout_width="1px"
            android:layout_height="50dp"
            android:background="#cccccc"/>

        <TextView
            android:id="@+id/tv_data_purpose"
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:layout_gravity="center"
            android:gravity="center" />

        <View
            android:layout_width="1px"
            android:layout_height="50dp"
            android:background="#cccccc"/>

        <TextView
            android:id="@+id/tv_data_mac"
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:layout_gravity="center"
            android:gravity="center" />

        <View
            android:layout_width="1px"
            android:layout_height="50dp"
            android:background="#cccccc"/>

        <TextView
            android:id="@+id/tv_data_s_n"
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:layout_gravity="center"
            android:gravity="center" />


        <View
            android:layout_width="1px"
            android:layout_height="50dp"
            android:background="#cccccc"/>

        <TextView
            android:id="@+id/tv_data_phone"
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:layout_gravity="center"
            android:gravity="center" />


        <View
            android:layout_width="1px"
            android:layout_height="50dp"
            android:background="#cccccc"/>
    </LinearLayout>
</LinearLayout>

此方法借鉴于：https://www.cnblogs.com/begin1949/p/5910785.html

四、子线程中更新UI的方法

 Handler handler = new Handler(Looper.getMainLooper()) {
 	@Override
	public void handleMessage(Message msg) {
		super.handleMessage(msg);
		//执行调用主线程中的方法
       }
};
//开启线程启动导入文件
Thread importThread = new Thread() {
    @Override
    public void run() {
		super.run();
        inventoryService.importInventoryFile(inventoryDao, filePath);
        Message message = new Message();
        handler.sendMessage(message);
        }
   };
importThread.start();

此方法借鉴于 https://www.jianshu.com/p/ce34731f802e

五、调用文件管理器进行选择文件

1、全局对象
//全局intentActivityResultLauncher对象
private ActivityResultLauncher<Intent> intentActivityResultLauncher;
2、开启文件选择器
//点击导入按钮
Uri uri = Uri.parse("content://com.android.externalstorage.documents/document/primary:Download");
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
//限制文件类型
intent.setType("text/plain");
intent.addCategory(Intent.CATEGORY_OPENABLE);
//限制打开文件夹的路径
intent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, uri);
intentActivityResultLauncher.launch(intent);
3、接收返回的URI
/**
* 注册registerForActivityResult
* 选择文件后解析的方法
*/
public void myRegisterForActivityResult() {
        intentActivityResultLauncher = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), new ActivityResultCallback<ActivityResult>() {
        @Override
        public void onActivityResult(ActivityResult result) {
             Intent intent = result.getData();
             Uri uri = intent.getData();
			 //转换的工具类
             String filePath = UriUtil.getPath(getContext(), uri);
     });
}
4、uri转换FilePath工具类
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.DocumentsContract;
import android.provider.MediaStore;

import androidx.annotation.RequiresApi;

/**
 * @description Url工具类
 * @version 1.0.0
 */
public class UriUtil {
    /**
     * 从Uri获取文件路径，存储路径需要获取
     * android.permission.READ_EXTERNAL_STORAGE权限
     * 适用于MediaStore和其他基于文件的内容提供
     *
     * @param context 上下文对象
     * @param uri     Uri
     */
    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    public static String getPath(Context context, Uri uri) {
        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
        // DocumentProvider
        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
            // ExternalStorageProvider
            if (isExternalStorageDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];

                if ("primary".equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + "/" + split[1];
                }
            }
            // DownloadsProvider
            else if (isDownloadsDocument(uri)) {
                final String id = DocumentsContract.getDocumentId(uri);
                final Uri contentUri = ContentUris.withAppendedId(
                        Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));

                return getDataColumn(context, contentUri, null, null);
            }
            // MediaProvider
            else if (isMediaDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];

                Uri contentUri = null;
                if ("image".equals(type)) {
                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                } else if ("video".equals(type)) {
                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                } else if ("audio".equals(type)) {
                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                }

                final String selection = "_id=?";
                final String[] selectionArgs = new String[]{
                        split[1]
                };

                return getDataColumn(context, contentUri, selection, selectionArgs);
            }
        }
        // MediaStore (and general)
        else if ("content".equalsIgnoreCase(uri.getScheme())) {
            return getDataColumn(context, uri, null, null);
        }
        // File
        else if ("file".equalsIgnoreCase(uri.getScheme())) {
            return uri.getPath();
        }

        return null;
    }

    /**
     * Get the value of the data column for this Uri. This is useful for
     * MediaStore Uris, and other file-based ContentProviders.
     *
     * @param context       The context.
     * @param uri           The Uri to query.
     * @param selection     (Optional) Filter used in the query.
     * @param selectionArgs (Optional) Selection arguments used in the query.
     * @return The value of the _data column, which is typically a file path.
     */

    public static String getDataColumn(Context context, Uri uri, String selection,
                                       String[] selectionArgs) {

        Cursor cursor = null;
        final String column = "_data";
        final String[] projection = {
                column
        };
        try {
            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
                    null);
            if (cursor != null && cursor.moveToFirst()) {
                final int column_index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(column_index);
            }
        } finally {
            if (cursor != null)
                cursor.close();
        }
        return null;
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is ExternalStorageProvider.
     */
    public static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is DownloadsProvider.
     */
    public static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is MediaProvider.
     */
    public static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }
}
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