diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..eba61b5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+.idea/
+
+
diff --git a/Camera/CameraV2/app/src/main/java/com/lb377463323/camera2/MainActivity.java b/Camera/CameraV2/app/src/main/java/com/lb377463323/camera2/MainActivity.java
index 8368b43..23bdc11 100644
--- a/Camera/CameraV2/app/src/main/java/com/lb377463323/camera2/MainActivity.java
+++ b/Camera/CameraV2/app/src/main/java/com/lb377463323/camera2/MainActivity.java
@@ -23,6 +23,7 @@
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.support.v4.app.ActivityCompat;
+import android.support.v7.app.AppCompatActivity;
 import android.util.Size;
 import android.util.SparseIntArray;
 import android.view.Surface;
@@ -44,7 +45,7 @@
 import java.util.Date;
 import java.util.List;
 
-public class MainActivity extends Activity {
+public class MainActivity extends AppCompatActivity {
     private static final SparseIntArray ORIENTATION = new SparseIntArray();
 
     static {
@@ -75,17 +76,18 @@ protected void onCreate(Bundle savedInstanceState) {
         requestWindowFeature(Window.FEATURE_NO_TITLE);
 
         setContentView(R.layout.activity_main);
-        mTextureView = (TextureView) findViewById(R.id.textureView);
+        this.mTextureView = (TextureView) findViewById(R.id.textureView);
     }
 
     @Override
     protected void onResume() {
         super.onResume();
-        startCameraThread();
-        if (!mTextureView.isAvailable()) {
-            mTextureView.setSurfaceTextureListener(mTextureListener);
+        this.startCameraThread();
+        if (!this.mTextureView.isAvailable()) {
+            // 设置监听SurefaceTexture的事件
+            this.mTextureView.setSurfaceTextureListener(this.mTextureListener);
         } else {
-            startPreview();
+           this.startPreview();
         }
     }
 
@@ -182,9 +184,12 @@ private void openCamera() {
         CameraManager manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
         try {
             if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
-                return;
+//                return;
+                ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CALL_PHONE}, 1);
+            } else {
+                manager.openCamera(mCameraId, mStateCallback, mCameraHandler);
             }
-            manager.openCamera(mCameraId, mStateCallback, mCameraHandler);
+//            manager.openCamera(mCameraId, mStateCallback, mCameraHandler);
         } catch (CameraAccessException e) {
             e.printStackTrace();
         }
@@ -361,4 +366,22 @@ public void run() {
             }
         }
     }
+
+
+
+    // 向用户申请授权， 授权的结果封装在grantResults中。
+    @Override
+    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
+        switch (requestCode) {
+            case 1:
+                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                    this.openCamera();
+                } else {
+                    Toast.makeText(this, "You denied the permission", Toast.LENGTH_SHORT).show();
+                }
+                break;
+            default:
+                break;
+        }
+    }
 }
diff --git a/Camera/CameraV2/build.gradle b/Camera/CameraV2/build.gradle
index 1ea4bd0..7487467 100644
--- a/Camera/CameraV2/build.gradle
+++ b/Camera/CameraV2/build.gradle
@@ -3,9 +3,10 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.0'
+        classpath 'com.android.tools.build:gradle:3.4.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -15,6 +16,7 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
+        google()
     }
 }
 
diff --git a/Camera/CameraV2/gradle/wrapper/gradle-wrapper.properties b/Camera/CameraV2/gradle/wrapper/gradle-wrapper.properties
index 9550717..838deb9 100644
--- a/Camera/CameraV2/gradle/wrapper/gradle-wrapper.properties
+++ b/Camera/CameraV2/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Wed Oct 21 11:34:03 PDT 2015
+#Mon May 13 18:03:22 CST 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip