Android webview上传图片（调起相册/相机上传）

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);
              }
          });
      }
  
      /**
       * 选择图片弹框
       */
      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("*/*");
                      startActivityForResult(Intent.createChooser(i, "File Browser"), REQUEST_FILE_CHOOSER_CODE);
                  } else {
                      try {
                          Intent intent = fileChooserParams.createIntent();
                          startActivityForResult(intent, REQUEST_SELECT_FILE_CODE);
                      } catch (ActivityNotFoundException e) {
                          mUploadMsgs = null;
                      }
                  }
              }
          });
          camera.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View view) {
                  takeCameraPhoto();
              }
          });
          cancel.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View view) {
                  selectPicDialog.dismiss();
              }
          });
  
          selectPicDialog.setContentView(view);
          selectPicDialog.show();
      }
  
      public void takeCameraPhoto() {
          if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_ANY)) {
              Toast.makeText(this, "设备无摄像头", Toast.LENGTH_SHORT).show();
              return;
          }
  
          String filePath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getAbsolutePath();
          
          Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
          mFileFromCamera = new File(filePath, System.nanoTime() + ".jpg");
  
          if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
              intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(mTakePhotoFile));
              startActivityForResult(intent, REQUEST_FILE_CAMERA_CODE);
          } else {
              try {
                  mTakePhotoFile = File.createTempFile("Zp" + System.nanoTime(), ".jpg", filePath);
                  Uri contentUri = FileProvider.getUriForFile(InnerBrowserActivity.this,
                          "com.zp.demo.ZpFileProvider", mTakePhotoFile);
                  intent.putExtra(MediaStore.EXTRA_OUTPUT, contentUri);
                  intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION
                          | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
                  startActivityForResult(intent, REQUEST_FILE_CAMERA_CODE);
              } catch (IOException e) {
                  
              }
          }
      }
  
      @Override
      protected void onActivityResult(int requestCode, int resultCode, Intent data) {
          super.onActivityResult(requestCode, resultCode, data);
          switch (requestCode) {
              case REQUEST_SELECT_FILE_CODE:
                  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                      if (mUploadMsgs == null) {
                          return;
                      }
                      mUploadMsgs.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, data));
                      mUploadMsgs = null;
                  }
                  break;
              case REQUEST_FILE_CHOOSER_CODE:
                  if (mUploadMsg == null) {
                      return;
                  }
                  Uri result = data == null || resultCode != RESULT_OK ? null : data.getData();
                  mUploadMsg.onReceiveValue(result);
                  mUploadMsg = null;
                  break;
              case REQUEST_FILE_CAMERA_CODE:
                  takePictureFromCamera();
                  break;
          }
      }
  
      /**
       * 处理相机返回的图片
       */
      @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。