Android WebView加载H5网页通过WebChromeClient选择设备文件

冷不防 2024-02-19 15:31 7阅读 0赞

先写一个web.html作为测试网页文件放到res/assets目录下：

package zhangphil.book;
    
    import android.content.Intent;
    import android.net.Uri;
    import android.os.Bundle;
    import android.support.v7.app.AppCompatActivity;
    import android.webkit.ValueCallback;
    import android.webkit.WebChromeClient;
    import android.webkit.WebSettings;
    import android.webkit.WebView;
    
    public class MainActivity extends AppCompatActivity {
    
        private WebView mWebView;
        private ValueCallback<Uri[]> mValueCallback;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            mWebView = findViewById(R.id.webview);
    
            mWebView.loadUrl("file:///android_asset/web.html");
    
            WebSettings mWebSettings = mWebView.getSettings();
    
            //启用JavaScript。
            mWebSettings.setJavaScriptEnabled(true);
            mWebSettings.setUseWideViewPort(true);
    
            mWebSettings.setJavaScriptCanOpenWindowsAutomatically(true);
    
            mWebView.setWebChromeClient(new WebChromeClient() {
                //title：接收网页的标题。
                @Override
                public void onReceivedTitle(WebView view, String title) {
                    super.onReceivedTitle(view, title);
                    System.out.println(title);
                }
    
                //加载网页的进度。
                @Override
                public void onProgressChanged(WebView view, int newProgress) {
                    super.onProgressChanged(view, newProgress);
                    System.out.println(newProgress);
                }
    
                @Override
                public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
                    super.onShowFileChooser(webView, filePathCallback, fileChooserParams);
    
                    //在H5网页中打开一个原生的文件选择器选择文件。
                    
                    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
                    intent.addCategory(Intent.CATEGORY_OPENABLE);
                    intent.setType("*/*");
                    startActivityForResult(Intent.createChooser(intent, "选择文件"), 2019);
    
                    return true;
                }
            });
        }
    
        @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
            if (requestCode == 2019) {
                
                //选择好的文件路径： data.getData()
                System.out.println(data.getData());
            }
        }
    }