Android webview上传图片（调起相册/相机上传）

概述

默认情况

WebView 不支持，WebView 点击没有反应。

兼容

重写 webview 的 webchromeClient 中的 openFileChooser 方法。Android 版本的多样性，就理所当然的各种兼容。

  // For Android < 3.0
    public void openFileChooser(ValueCallback uploadMsg) {
        openFileChooser(uploadMsg, "");
    }

    //For Android 3.0 - 4.0
    public void openFileChooser(ValueCallback uploadMsg, String acceptType) {
    }

    // For Android 4.0 - 5.0
    public void openFileChooser(ValueCallback uploadMsg, String acceptType, String capture) {
        openFileChooser(uploadMsg, acceptType);
    }

    // For Android > 5.0
    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public boolean onShowFileChooser(WebView webView, ValueCallback filePathCallback, FileChooserParams fileChooserParams) {
        return true;
    }

具体代码实现

网上也有很多实现方式，这边记录一下自己用到的一种
webview 调用时，弹出本地弹框，选择（相册/相机/取消），选择相册跳转到文件选择页面、选择相机注意权限配置，返回照片要做压缩、选择取消注意给webview一个空回应，要不点击没有反应。

• ZpWebChromeClient

• public class ZpWebChromeClient extends WebChromeClient {
  
      private OpenFileChooserCallBack mOpenFileChooserCallBack;
  
      // For Android < 3.0
      public void openFileChooser(ValueCallback uploadMsg) {
          openFileChooser(uploadMsg, "");
      }
  
      //For Android 3.0 - 4.0
      public void openFileChooser(ValueCallback uploadMsg, String acceptType) {
          if (mOpenFileChooserCallBack != null) {
              mOpenFileChooserCallBack.openFileChooserCallBack(uploadMsg, acceptType);
          }
      }
  
      // For Android 4.0 - 5.0
      public void openFileChooser(ValueCallback uploadMsg, String acceptType, String capture) {
          openFileChooser(uploadMsg, acceptType);
      }
  
      // For Android > 5.0
      @TargetApi(Build.VERSION_CODES.LOLLIPOP)
      public boolean onShowFileChooser(WebView webView, ValueCallback filePathCallback, FileChooserParams fileChooserParams) {
          if (mOpenFileChooserCallBack != null) {
              mOpenFileChooserCallBack.showFileChooserCallBack(filePathCallback, fileChooserParams);
          }
          return true;
      }
  
      public void setOpenFileChooserCallBack(OpenFileChooserCallBack callBack) {
          mOpenFileChooserCallBack = callBack;
      }
  
      public interface OpenFileChooserCallBack {
  
          void openFileChooserCallBack(ValueCallback uploadMsg, String acceptType);
  
          void showFileChooserCallBack(ValueCallback filePathCallback, FileChooserParams fileChooserParams);
      }
  
  }

• ZpWebView

• public class ZpWebView extends WebView {
  
      private ZpWebChromeClient webChromeClient;
  
      public ZpWebView(Context context) {
          super(context);
          initWebView();
      }
  
      public ZpWebView(Context context, AttributeSet attrs) {
          super(context, attrs);
          initWebView();
      }
  
      public ZpWebView(Context context, AttributeSet attrs, int defStyleAttr) {
          super(context, attrs, defStyleAttr);
          initWebView();
      }
  
      private void initWebView() {
          webChromeClient = new ZpWebChromeClient();
          setWebChromeClient(webChromeClient);
  
          WebSettings webviewSettings = getSettings();
          // 不支持缩放
          webviewSettings.setSupportZoom(false);
          // 自适应屏幕大小
          webviewSettings.setUseWideViewPort(true);
          webviewSettings.setLoadWithOverviewMode(true);
          String cacheDirPath = getContext().getFilesDir().getAbsolutePath() + "cache/";
          webviewSettings.setAppCachePath(cacheDirPath);
          webviewSettings.setAppCacheEnabled(true);
          webviewSettings.setDomStorageEnabled(true);
          webviewSettings.setAllowFileAccess(true);
          webviewSettings.setAppCacheMaxSize(1024 * 1024 * 8);
          webviewSettings.setCacheMode(WebSettings.LOAD_NO_CACHE);
      }
  
      public void setOpenFileChooserCallBack(ZpWebChromeClient.OpenFileChooserCallBack callBack) {
          webChromeClient.setOpenFileChooserCallBack(callBack);
      }
  }

• MainActivity

• public class MainActivity extends AppCompatActivity {
  
      public static final int REQUEST_SELECt_FILE_CODE = 100;
      private static final int REQUEST_FILE_CHOOSER_CODE = 101;
      private static final int REQUEST_FILE_CAMERA_CODE = 102;
      // 默认图片压缩大小（单位：K）
      public static final int IMAGE_COMPRESS_SIZE_DEFAULT = 400;
      // 压缩图片最小高度
      public static final int COMPRESS_MIN_HEIGHT = 900;
      // 压缩图片最小宽度
      public static final int COMPRESS_MIN_WIDTH = 675;
  
      private ValueCallback mUploadMsg;
      private ValueCallback mUploadMsgs;
      // 相机拍照返回的图片文件
      private File mFileFromCamera;
      private File mTakePhotoFile;
      private BottomSheetDialog selectPicDialog;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          initView();
      }
  
      private void initView() {
          ZpWebView webView = findViewById(R.id.webview);
          webView.setOpenFileChooserCallBack(new ZpWebChromeClient.OpenFileChooserCallBack() {
              @Override
              public void openFileChooserCallBack(ValueCallback uploadMsg, String acceptType) {
                  mUploadMsg = uploadMsg;
                  showSelectPictrueDialog(0, null);
              }
  
              @Override
              public void showFileChooserCallBack(ValueCallback filePathCallback, WebChromeClient.FileChooserParams fileChooserParams) {
                  if (mUploadMsgs != null) {
                      mUploadMsgs.onReceiveValue(null);
                  }
                  mUploadMsgs = filePathCallback;
                  showSelectPictrueDialog(1, fileChooserParams);
              }
          });
      }
  
      
      private void showSelectPictrueDialog(final int tag, final WebChromeClient.FileChooserParams fileChooserParams) {
          selectPicDialog = new BottomSheetDialog(this, R.style.Dialog_NoTitle);
          selectPicDialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
              @Override
              public void onDismiss(DialogInterface dialogInterface) {
                  if (mUploadMsgs != null) {
                      mUploadMsgs.onReceiveValue(null);
                      mUploadMsgs = null;
                  }
              }
          });
          View view = LayoutInflater.from(this).inflate(R.layout.dialog_bottom_select_pictrue, null);
          // 相册
          TextView album = view.findViewById(R.id.tv_select_pictrue_album);
          // 相机
          TextView camera = view.findViewById(R.id.tv_select_pictrue_camera);
          // 取消
          TextView cancel = view.findViewById(R.id.tv_select_pictrue_cancel);
  
          album.setOnClickListener(new View.OnClickListener() {
              @TargetApi(Build.VERSION_CODES.LOLLIPOP)
              @Override
              public void onClick(View view) {
                  if (tag == 0) {
                      Intent i = new Intent(Intent.ACTION_GET_CONTENT);
                      i.addCategory(Intent.CATEGORY_OPENABLE);
                      i.setType("*
      @TargetApi(Build.VERSION_CODES.LOLLIPOP)
      private void takePictureFromCamera() {
          if (mFileFromCamera != null && mFileFromCamera.exists()) {
              String filePath = mFileFromCamera.getAbsolutePath();
              // 压缩图片到指定大小
              File imgFile = ZpImageUtils.compressImage(this, filePath, COMPRESS_MIN_WIDTH, COMPRESS_MIN_HEIGHT, IMAGE_COMPRESS_SIZE_DEFAULT);
  
              Uri localUri = Uri.fromFile(imgFile);
              Intent localIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, localUri);
              this.sendBroadcast(localIntent);
              Uri result = Uri.fromFile(imgFile);
  
              if (mUploadMsg != null) {
                  mUploadMsg.onReceiveValue(Uri.parse(filePath));
                  mUploadMsg = null;
              }
              if (mUploadMsgs != null) {
                  mUploadMsgs.onReceiveValue(new Uri[]{result});
                  mUploadMsgs = null;
              }
          } else {
              if (mUploadMsg != null) {
                  mUploadMsg.onReceiveValue(null);
                  mUploadMsg = null;
              }
              if (mUploadMsgs != null) {
                  mUploadMsgs.onReceiveValue(null);
                  mUploadMsgs = null;
              }            
          }
      }
  }

  备注：代码不规范的地方，自己抽取一下，这里就不做抽取了。

• Github 地址

• WebViewUploadFileDemo