Inline hippo's all libs

* These dependencies are outdated and lack of maintenance

app/src/main/java/com/hippo/unifile/Contracts.java

@@ -0,0 +1,119 @@
+/*
+ * Copyright 2016 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.unifile;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+
+import androidx.annotation.NonNull;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+final class Contracts {
+    private Contracts() {}
+
+    static String queryForString(Context context, Uri self, String column,
+            String defaultValue) {
+        final ContentResolver resolver = context.getContentResolver();
+
+        Cursor c = null;
+        try {
+            c = resolver.query(self, new String[] { column }, null, null, null);
+            if (c != null && c.moveToFirst() && !c.isNull(0)) {
+                return c.getString(0);
+            } else {
+                return defaultValue;
+            }
+        } catch (Throwable e) {
+            Utils.throwIfFatal(e);
+            return defaultValue;
+        } finally {
+            Utils.closeQuietly(c);
+        }
+    }
+
+    static int queryForInt(Context context, Uri self, String column,
+            int defaultValue) {
+        return (int) queryForLong(context, self, column, defaultValue);
+    }
+
+    static long queryForLong(Context context, Uri self, String column,
+            long defaultValue) {
+        final ContentResolver resolver = context.getContentResolver();
+
+        Cursor c = null;
+        try {
+            c = resolver.query(self, new String[] { column }, null, null, null);
+            if (c != null && c.moveToFirst() && !c.isNull(0)) {
+                return c.getLong(0);
+            } else {
+                return defaultValue;
+            }
+        } catch (Throwable e) {
+            Utils.throwIfFatal(e);
+            return defaultValue;
+        } finally {
+            Utils.closeQuietly(c);
+        }
+    }
+
+    @NonNull
+    static OutputStream openOutputStream(Context context, Uri uri) throws IOException {
+        try {
+            OutputStream os = context.getContentResolver().openOutputStream(uri);
+            if (os == null) {
+                throw new IOException("Can't open OutputStream");
+            }
+            return os;
+        } catch (Throwable e) {
+            Utils.throwIfFatal(e);
+            throw new IOException("Can't open OutputStream", e);
+        }
+    }
+
+    @NonNull
+    static OutputStream openOutputStream(Context context, Uri uri, boolean append) throws IOException {
+        try {
+            OutputStream os = context.getContentResolver().openOutputStream(uri, append ? "wa" : "w");
+            if (os == null) {
+                throw new IOException("Can't open OutputStream");
+            }
+            return os;
+        } catch (Throwable e) {
+            Utils.throwIfFatal(e);
+            throw new IOException("Can't open OutputStream", e);
+        }
+    }
+
+    @NonNull
+    static InputStream openInputStream(Context context, Uri uri) throws IOException {
+        try {
+            InputStream is = context.getContentResolver().openInputStream(uri);
+            if (is == null) {
+                throw new IOException("Can't open InputStream");
+            }
+            return is;
+        } catch (Throwable e) {
+            Utils.throwIfFatal(e);
+            throw new IOException("Can't open InputStream", e);
+        }
+    }
+}