Create AppAssetsUtils.java

2026-05-12 11:20:47 -07:00 · 2020-08-27 12:38:47 +08:00
parent 9cc206cc95
commit 8be2b3d3ea
1 changed files with 99 additions and 0 deletions
@@ -0,0 +1,99 @@
+package com.proxgrind.chameleon.utils.system;
+
+import android.content.Context;
+import android.content.res.AssetManager;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+/*
+ * 针对Assets进行操作的类!
+ * */
+public class AppAssetsUtils {
+
+    private Context context;
+
+    public AppAssetsUtils(Context context) {
+        this.context = context;
+    }
+
+    //判断assets文件是否存在!
+    public boolean isFileExists(String fileName) {
+        InputStream is = null;
+        boolean ret = false;
+        try {
+            is = context.getResources().getAssets().open(fileName);
+            ret = true;
+        } catch (IOException e) {
+            e.printStackTrace();
+        } finally {
+            try {
+                if (is != null)
+                    is.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+        return ret;
+    }
+
+    //得到assets指定目录下的所有文件!
+    public String[] getFiles(String root) {
+        String[] files = new String[0];
+        try {
+            files = context.getAssets().list(root);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        if (files == null || files.length == 0) return null;
+        return files;
+    }
+
+    //移动assets中的文件到指定目录
+    public boolean moveFile(String asFile, String targetPath) {
+        File file = new File(targetPath);
+        if (!file.exists() || !file.isFile()) {
+            try {
+                if (!file.createNewFile()) {
+                    return false;
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+                return false;
+            }
+        }
+        boolean ret = false;
+        //移动默认key文件
+        AssetManager am = context.getResources().getAssets();
+        InputStream is = null;
+        FileOutputStream fos = null;
+        try {
+            is = am.open(asFile);
+            fos = new FileOutputStream(file);
+            int len = is.available();
+            for (int i = 0; i < len; ++i) {
+                fos.write((byte) is.read());
+            }
+            ret = true;
+        } catch (IOException e) {
+            e.printStackTrace();
+            try {
+                if (is != null) is.close();
+                if (fos != null) fos.close();
+                ret = false;
+            } catch (IOException e1) {
+                e1.printStackTrace();
+            }
+        } finally {
+            try {
+                if (is != null) is.close();
+                if (fos != null) fos.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+        return ret;
+    }
+}