完善调用相机提示

imageselector/src/main/java/com/donkingliang/imageselector/ImageSelectorActivity.java

@@ -38,6 +38,7 @@ import android.view.Window;
 import android.view.WindowManager;
 import android.widget.FrameLayout;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import com.donkingliang.imageselector.adapter.FolderAdapter;
 import com.donkingliang.imageselector.adapter.ImageAdapter;
@@ -712,6 +713,9 @@ public class ImageSelectorActivity extends AppCompatActivity {
                 startActivityForResult(captureIntent, CAMERA_REQUEST_CODE);
                 mTakeTime = System.currentTimeMillis();
             }
+        }else{
+            // 没有应用可以处理这个Intent，显示错误消息或采取其他措施
+            Toast.makeText(this, "没有可用的相机应用", Toast.LENGTH_SHORT).show();
         }
     }