Android Environment 获取各种路径的方法

来源：互联网发布：深圳最好的java培训编辑：程序博客网时间：2024/06/01 18:20

<pre name="code" class="java">package com.deepoon.beyond.environment;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.os.Environment;import android.widget.TextView;import com.deepoon.beyond.R;public class EnvironmentActivity extends Activity {    private Context mContext;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        mContext = this;        setContentView(R.layout.activity_environment);        TextView textViewDataDirectory = (TextView) findViewById(R.id.textview_data_directory);        textViewDataDirectory.setText(Environment.getDataDirectory().getPath());        TextView textViewRootDirectory = (TextView) findViewById(R.id.textview_root_directory);        textViewRootDirectory.setText(Environment.getRootDirectory().getPath());        TextView textViewExternalStorageState = (TextView) findViewById(R.id.textview_external_storage_state);        textViewExternalStorageState.setText(Environment.getExternalStorageState().toString());        TextView textViewDownloadCacheDirectory = (TextView) findViewById(R.id.textview_download_cache_directory);        textViewDownloadCacheDirectory.setText(Environment.getDownloadCacheDirectory().getPath());        TextView textViewExternalStorageDirectory = (TextView) findViewById(R.id.textview_external_storage_directory);        textViewExternalStorageDirectory.setText(Environment.getExternalStorageDirectory().getPath());        TextView textViewExternalStorageEmulated = (TextView) findViewById(R.id.textview_external_storage_emulated);        textViewExternalStorageEmulated.setText("设备的外存是否是用内存模拟的: " + Environment.isExternalStorageEmulated());        TextView textViewExternalStorageRemovable = (TextView) findViewById(R.id.textview_external_storage_removable);        textViewExternalStorageRemovable.setText("设备的外存是否是可以拆卸的: " + Environment.isExternalStorageRemovable());        TextView textViewDirectoryAlarms = (TextView) findViewById(R.id.textview_directory_alarms);        textViewDirectoryAlarms.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_ALARMS).getPath());        TextView textViewDirectoryDCIM = (TextView) findViewById(R.id.textview_directory_dcim);        textViewDirectoryDCIM.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getPath());        TextView textViewDirectoryDocuments = (TextView) findViewById(R.id.textview_directory_documents);        textViewDirectoryDocuments.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS).getPath());        TextView textViewDirectoryDownloads = (TextView) findViewById(R.id.textview_directory_downloads);        textViewDirectoryDownloads.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).getPath());        TextView textViewDirectoryMovies = (TextView) findViewById(R.id.textview_directory_movies);        textViewDirectoryMovies.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES).getPath());        TextView textViewDirectoryMusic = (TextView) findViewById(R.id.textview_directory_music);        textViewDirectoryMusic.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC).getPath());        TextView textViewDirectoryNotifications = (TextView) findViewById(R.id.textview_directory_notifications);        textViewDirectoryNotifications.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_NOTIFICATIONS).getPath());        TextView textViewDirectoryPictures = (TextView) findViewById(R.id.textview_directory_pictures);        textViewDirectoryPictures.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getPath());        TextView textViewDirectoryPodcasts = (TextView) findViewById(R.id.textview_directory_podcasts);        textViewDirectoryPodcasts.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PODCASTS).getPath());        TextView textViewDirectoryRingtones = (TextView) findViewById(R.id.textview_directory_ringtones);        textViewDirectoryRingtones.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_RINGTONES).getPath());        TextView textViewFilesDir = (TextView) findViewById(R.id.textview_files_dir);        textViewFilesDir.setText(mContext.getFilesDir().getPath());        TextView textViewCacheDir = (TextView) findViewById(R.id.textview_cache_dir);        textViewCacheDir.setText(mContext.getCacheDir().getPath());        TextView textViewExternalFilesDir = (TextView) findViewById(R.id.textview_external_files_dir);        textViewExternalFilesDir.setText(mContext.getExternalFilesDir(Environment.DIRECTORY_MOVIES).getPath());        TextView textViewExternalCacheDir = (TextView) findViewById(R.id.textview_external_cache_dir);        textViewExternalCacheDir.setText(mContext.getExternalCacheDir().getPath());    }}

</pre><pre name="code" class="html"><?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"    >    <ScrollView        android:layout_width="match_parent"        android:layout_height="match_parent">        <LinearLayout            android:layout_width="match_parent"            android:layout_height="match_parent"            android:gravity="center"            android:orientation="vertical">            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="------------------Environment API-----------------------"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_root_directory"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Environment.getRootDirectory()"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_data_directory"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Environment.getDataDirectory()"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_external_storage_state"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Environment.getExternalStorageState()"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_download_cache_directory"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Environment.getDownloadCacheDirectory()"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_external_storage_directory"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Environment.getExternalStorageDirectory()"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_external_storage_emulated"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Environment.isExternalStorageEmulated()"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_external_storage_removable"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Environment.isExternalStorageRemovable()"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:text="注意：传入的类型参数不能是null，返回的目录路径有可能不存在，所以必须在使用之前确认一下，比如使用File.mkdirs创建该路径"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_directory_alarms"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="系统提醒铃声: Environment.DIRECTORY_ALARMS"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_directory_dcim"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="相机拍摄照片和视频: Environment.DIRECTORY_DCIM"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_directory_documents"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="文档: Environment.DIRECTORY_DOCUMENTS"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_directory_downloads"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="下载: Environment.DIRECTORY_DOWNLOADS"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_directory_movies"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="电影: Environment.DIRECTORY_MOVIES"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_directory_music"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="音乐: Environment.DIRECTORY_MUSIC"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_directory_notifications"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="系统通知铃声: Environment.DIRECTORY_NOTIFICATIONS"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_directory_pictures"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="图片: Environment.DIRECTORY_PICTURES"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_directory_podcasts"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="系统广播: Environment.DIRECTORY_PODCASTS"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_directory_ringtones"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="系统铃声: Environment.DIRECTORY_RINGTONES"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="--------------------Context API------------------------"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_files_dir"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="应用的在系统内部Files: Context.getFilesDir()"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_cache_dir"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="应用的在系统内部Cache: Context.getCacheDir()"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_external_files_dir"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="应用的在SDCard Files: Context.getExternalFilesDir()"                android:textSize="14sp"/>            <TextView                android:id="@+id/textview_external_cache_dir"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="10dp"                android:textSize="14sp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="应用的在SDCard Files: Context.getExternalCacheDir()"                android:textSize="14sp"/>        </LinearLayout>    </ScrollView></LinearLayout>

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