Android中WebView網頁上傳文件設置

功能

在webView加載的網頁中選擇文件可以正常調用原生的選擇文件功能

webView#setWebChromeClient

public class MainActivity extends AppCompatActivity {

    private WebView webView;
    private ValueCallback<Uri> uploadFile;
    private ValueCallback<Uri[]> uploadFiles;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        webView = findViewById(R.id.webview);
        webView.setWebChromeClient(new WebChromeClient() {
            // For Android 3.0+
            public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
                Log.i("test", "openFileChooser 1");
                uploadFile = uploadFile;
                openFileChooseProcess();
            }

            // For Android < 3.0
            public void openFileChooser(ValueCallback<Uri> uploadMsgs) {
                Log.i("test", "openFileChooser 2");
                uploadFile = uploadFile;
                openFileChooseProcess();
            }

            // For Android  > 4.1.1
            public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
                Log.i("test", "openFileChooser 3");
                uploadFile = uploadFile;
                openFileChooseProcess();
            }

            // For Android  >= 5.0
            public boolean onShowFileChooser(WebView webView,
                                             ValueCallback<Uri[]> filePathCallback,
                                             WebChromeClient.FileChooserParams fileChooserParams) {
                Log.i("test", "openFileChooser 4:" + filePathCallback.toString());
                uploadFiles = filePathCallback;
                openFileChooseProcess();
                return true;
            }
        });
        webView.loadUrl("file:///android_asset/fileChooser.html");
    }

    private void openFileChooseProcess() {
        Intent i = new Intent(Intent.ACTION_GET_CONTENT);
        i.addCategory(Intent.CATEGORY_OPENABLE);
        i.setType("*/*");
        startActivityForResult(Intent.createChooser(i, "選擇文件"), 0);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK) {
            switch (requestCode) {
                case 0:
                    if (uploadFile != null) {
                        Uri result = data == null || resultCode != RESULT_OK ? null
                                : data.getData();
                        uploadFile.onReceiveValue(result);
                        uploadFile = null;
                    }
                    if (uploadFiles != null) {
                        Uri result = data == null || resultCode != RESULT_OK ? null
                                : data.getData();
                        uploadFiles.onReceiveValue(new Uri[]{result});
                        uploadFiles = null;
                    }
                    break;
                default:
                    break;
            }
        } else if (resultCode == RESULT_CANCELED) {
            if (uploadFile != null) {
                uploadFile.onReceiveValue(null);
                uploadFile = null;
            }
            if (uploadFiles != null) {
                uploadFiles.onReceiveValue(null);
                uploadFiles = null;
            }
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        webView.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
        webView.onPause();
    }

    /**
     * 確保註銷配置能夠被釋放
     */
    @Override
    protected void onDestroy() {
        if (webView != null) {
            webView.destroy();
        }
        super.onDestroy();
    }
}

demo下載