Android Webview实现图片、文件上传及启动相机功能

webView.setWebChromeClient(webChromeClient);

private String mCameraFilePath = null;
private ValueCallback<Uri> mUploadMessage;// 表单的数据信息
private final static int FILECHOOSER_RESULTCODE = 1;// 表单的结果回调</span>

private WebChromeClient webChromeClient = new WebChromeClient() {
// For Android 3.0+
public void openFileChooser(ValueCallback<Uri> uploadMsg) {
if (uploadMsg == null) {
return;
}

mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
activity.startActivityForResult(
Intent.createChooser(i, "File Chooser"),
FILECHOOSER_RESULTCODE);

}

// For Android 3.0+
public void openFileChooser(ValueCallback uploadMsg, String acceptType) {
if (uploadMsg == null) {
return;
}

mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("*/*");
activity.startActivityForResult(
Intent.createChooser(i, "File Browser"),
FILECHOOSER_RESULTCODE);
}

// For Android 4.1
public void openFileChooser(ValueCallback<Uri> uploadMsg,
String acceptType, String capture) {
if (uploadMsg == null) {
return;
}

mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
activity.startActivityForResult(
Intent.createChooser(i, "File Chooser"),
FILECHOOSER_RESULTCODE);

}

private Intent createDefaultOpenableIntent() {
// Create and return a chooser with the default OPENABLE
// actions including the camera, camcorder and sound
// recorder where available.
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("*/*");

Intent chooser = createChooserIntent(createCameraIntent(),
createCamcorderIntent(), createSoundRecorderIntent());
chooser.putExtra(Intent.EXTRA_INTENT, i);
return chooser;
}

private Intent createChooserIntent(Intent... intents) {
Intent chooser = new Intent(Intent.ACTION_CHOOSER);
chooser.putExtra(Intent.EXTRA_INITIAL_INTENTS, intents);
chooser.putExtra(Intent.EXTRA_TITLE, "File Chooser");
return chooser;
}

private Intent createCameraIntent() {
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

File externalDataDir = Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
System.out.println("externalDataDir:" + externalDataDir);
File cameraDataDir = new File(externalDataDir.getAbsolutePath()
+ File.separator + "browser-photo");
cameraDataDir.mkdirs();
mCameraFilePath = cameraDataDir.getAbsolutePath() + File.separator
+ System.currentTimeMillis() + ".jpg";
System.out.println("mcamerafilepath:" + mCameraFilePath);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(new File(mCameraFilePath)));

return cameraIntent;
}

private Intent createCamcorderIntent() {
return new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
}

private Intent createSoundRecorderIntent() {
return new Intent(MediaStore.Audio.Media.RECORD_SOUND_ACTION);
}
};

public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == FILECHOOSER_RESULTCODE) {
if (null == mUploadMessage)
return;
Uri result = intent == null || resultCode != Activity.RESULT_OK ? null
: intent.getData();

if (result == null && intent == null
&& resultCode == Activity.RESULT_OK) {
File cameraFile = new File(mCameraFilePath);

if (cameraFile.exists()) {
result = Uri.fromFile(cameraFile);
activity.sendBroadcast(new Intent(
Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, result));
}
}

mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
}