Android app-cache-Path的 緩存圖片、緩存文件的路徑包名路徑 和外路徑比較

代碼對應的路徑：

                    //判斷手機是否掛在sd卡
                    String externalStorageState= Environment.getExternalStorageState();
                    File downloadCacheDirectory= Environment.getDownloadCacheDirectory();
                    File rootDirectory= Environment.getRootDirectory();
                    File dataDirectory= Environment.getDataDirectory();
                    File externalStorageDirectory= Environment.getExternalStorageDirectory();
                    File externalStoragePublicDirectory= Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC);

                        String externalObbDir = getApplication().getObbDir().toString();

                        //獲取該程序的安裝包路徑
                        String appResourcePath=getApplicationContext().getPackageResourcePath();
                        String appCodePath = getApplication().getPackageCodePath();

                        //獲取當前程序路徑
                        String packageAbsolutePath = getApplicationContext().getFilesDir().getAbsolutePath();
                        //獲取程序默認數據庫路徑
                        String packageDatabasePath=getApplicationContext().getDatabasePath("com.tencent.mobileapp").getPath();
                        String packageCacheApp = getApplication().getCacheDir().toString();
                        String packagePath = getApplicationContext().getFilesDir().getParentFile().getPath();

                        String s= "externalStorageState = mounted;" +
                                "downloadCacheDirectory = /cache;" +
                                "rootDirectory = /system;" +
                                "dataDirectory = /data;" +
                                "externalStorageDirectory = /storage/emulated/0;" +
                                "externalStoragePublicDirectory = /storage/emulated/0/Music;" +

                                "externalObbDir = /storage/emulated/0/Android/obb/com.dxiang.demoproguard;" +

                                "appResourcePath = /data/app/com.dxiang.demoproguard-1.apk" +
                                "appCodePath = /data/app/com.dxiang.demoproguard-2.apk" +

                                "packageAbsolutePath = /data/data/com.dxiang.demoproguard/files" +
                                "packageDatabasePath = /data/data/com.dxiang.demoproguard/databases/com.tencent.mobileapp"+
                                "packageCacheApp = /data/data/com.dxiang.demoproguard/cache;" +
                                "packagePath = /data/data/com.dxiang.demoproguard;";

1.清除緩存：只是從/data/data/com.dxiang.demoproguard 這路徑裏面的文件都不見了，但是文件夾還是存在的；

2.清除數據：是將    /data/data/com.dxiang.demoproguard 裏面的【文件】+【文件夾】都刪除掉；

3. /data/data/com.dxiang.demoproguard 裏面的數據   緩存==文件大小+？？？不知道