update README.md

Author: GitHubZJY

README.md

@@ -33,7 +33,24 @@ allprojects {
 implementation 'com.github.GitHubZJY:AudioVisualizeView:v1.0.0'
 ```
 
-### 1.在xml中引用
+### 1.申请录音权限和读写权限
+```xml
+<uses-permission android:name="android.permission.RECORD_AUDIO" />
+<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+```
+由于需要读取音频数据和音频文件，需要先动态申请所需的权限，例：
+```java
+if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+    int checkCallPhonePermission = ContextCompat.checkSelfPermission(activity, Manifest.permission.RECORD_AUDIO);
+    if (checkCallPhonePermission != PackageManager.PERMISSION_GRANTED) {
+        ActivityCompat.requestPermissions(activity, new String[]{permission}, requestCode);
+    }
+}
+```
+详情可参考本项目demo
+
+### 2.在xml中引用
 
 ```xml
 <com.zjy.audiovisualize.view.SingleVisualizeView
@@ -43,7 +60,7 @@ implementation 'com.github.GitHubZJY:AudioVisualizeView:v1.0.0'
         android:layout_height="wrap_content" />
 ```
 
-### 2.在代码中初始化
+### 3.在代码中初始化
 ```java
 public class SingleVisualizeActivity extends AppCompatActivity {
 

audiovisualize/src/main/AndroidManifest.xml

@@ -2,7 +2,6 @@
     package="com.zjy.audiovisualize">
 
     <uses-permission android:name="android.permission.RECORD_AUDIO" />
-    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 </manifest>