我是android工作室的新手，我面临的问题是我在原始文件中保存了一个html文件，并使用webview在活动中访问它，当应用程序打开时，它会要求从SD卡打开文件但是当触摸时它没有留在同一页面，我已经在manafist中包含sd卡读取权限。请提前帮助，谢谢。
[我的页面的屏幕截图] [1]
[！[在此处输入图像说明] [1]] [1]
这里按下时浏览你的手机没有做任何事情。
这是我的java
public class MainActivity extends AppCompatActivity {
private WebView webView;
private String myString= "", customHtm="";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView = (WebView) findViewById(R.id.webview1);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setLoadWithOverviewMode(true);
webView.getSettings().setUseWideViewPort(true);
webView.getSettings().setSupportZoom(true);
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setDisplayZoomControls(false);
webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
webView.setScrollbarFadingEnabled(false);
webView.getSettings().setAllowFileAccess(true);
String userAgent = "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.4) Gecko/20100101 Firefox/4.0";
webView.getSettings().setUserAgentString(userAgent);
webView.loadUrl("file:///android_res/raw/simp.html");
}
}
this is what i Intend to happen 只是当按下链接时我希望在构建的动作中发生这种情况，
答案 0 :(得分：0)
以下代码有效：
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="@android:color/white"
android:gravity="center">
<CheckBox
android:id="@+id/ckb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true" />
<TextView
android:id="@+id/tvEduName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="ABC"
android:textSize="17sp" />
</LinearLayout>
在代码中，要求选择一般文件不具体的文件，如jpg，mp3，这样就会打开常规文件选择器。您必须手动选择需要选择的内容。
如果您需要选择图片，请替换
public class MainActivity extends AppCompatActivity {
private WebView webView;
final Activity activity = this;
public Uri imageUri;
private static final int FILECHOOSER_RESULTCODE = 2888;
private ValueCallback<Uri> mUploadMessage;
private Uri mCapturedImageURI = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Get webview
webView = (WebView) findViewById(R.id.webview1);
// Define url that will open in webview
String webViewUrl = "file:///android_res/raw/simp.html";
// Javascript inabled on webview
webView.getSettings().setJavaScriptEnabled(true);
// Other webview options
webView.getSettings().setLoadWithOverviewMode(true);
webView.getSettings().setUseWideViewPort(true);
//webView.getSettings().setUseWideViewPort(true);
//Other webview settings
webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
webView.setScrollbarFadingEnabled(false);
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setPluginState(PluginState.ON);
webView.getSettings().setAllowFileAccess(true);
webView.getSettings().setSupportZoom(true);
webView.getSettings().setDisplayZoomControls(false);
String userAgent = "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.4) Gecko/20100101 Firefox/4.0";
webView.getSettings().setUserAgentString(userAgent);
//Load url in webview
webView.loadUrl(webViewUrl);
// Define Webview manage classes
startWebView();
}
private void startWebView() {
// Create new webview Client to show progress dialog
// Called When opening a url or click on link
// You can create external class extends with WebViewClient
// Taking WebViewClient as inner class
webView.setWebViewClient(new WebViewClient() {
ProgressDialog progressDialog;
//If you will not use this method url links are open in new brower not in webview
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// Check if Url contains ExternalLinks string in url
// then open url in new browser
// else all webview links will open in webview browser
if(url.contains("google")){
// Could be cleverer and use a regex
//Open links in new browser
view.getContext().startActivity(
new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
// Here we can open new activity
return true;
} else {
// Stay within this webview and load url
view.loadUrl(url);
return true;
}
}
//Show loader on url load
public void onLoadResource (WebView view, String url) {
// if url contains string androidexample
// Then show progress Dialog
if (progressDialog == null && url.contains("androidexample")
) {
// in standard case YourActivity.this
progressDialog = new ProgressDialog(MainActivity.this);
progressDialog.setMessage("Loading...");
progressDialog.show();
}
}
// Called when all page resources loaded
public void onPageFinished(WebView view, String url) {
try{
// Close progressDialog
if (progressDialog.isShowing()) {
progressDialog.dismiss();
progressDialog = null;
}
}catch(Exception exception){
exception.printStackTrace();
}
}
});
// You can create external class extends with WebChromeClient
// Taking WebViewClient as inner class
// we will define openFileChooser for select file from camera or sdcard
webView.setWebChromeClient(new WebChromeClient() {
// openFileChooser for Android 3.0+
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType){
// Update message
mUploadMessage = uploadMsg;
try{
// Create AndroidExampleFolder at sdcard
File imageStorageDir = new File(
Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES)
, "AndroidExampleFolder");
if (!imageStorageDir.exists()) {
// Create AndroidExampleFolder at sdcard
imageStorageDir.mkdirs();
}
// Create camera captured image file path and name
File file = new File(
imageStorageDir + File.separator + ""
+ String.valueOf(System.currentTimeMillis())
+ ".stl");
mCapturedImageURI = Uri.fromFile(file);
// Camera capture image intent
final Intent captureIntent = new Intent(
android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
captureIntent.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("*/*");
// Create file chooser intent
Intent chooserIntent = Intent.createChooser(i, "Chooser STL file to view");
// Set camera intent to file chooser
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS
, new Parcelable[] { captureIntent });
// On select image call onActivityResult method of activity
startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);
}
catch(Exception e){
Toast.makeText(getBaseContext(), "Exception:"+e,
Toast.LENGTH_LONG).show();
}
}
// openFileChooser for Android < 3.0
public void openFileChooser(ValueCallback<Uri> uploadMsg){
openFileChooser(uploadMsg, "");
}
//openFileChooser for other Android versions
public void openFileChooser(ValueCallback<Uri> uploadMsg,
String acceptType,
String capture) {
openFileChooser(uploadMsg, acceptType);
}
// The webPage has 2 filechoosers and will send a
// console message informing what action to perform,
// taking a photo or updating the file
public boolean onConsoleMessage(ConsoleMessage cm) {
onConsoleMessage(cm.message(), cm.lineNumber(), cm.sourceId());
return true;
}
public void onConsoleMessage(String message, int lineNumber, String sourceID) {
//Log.d("androidruntime", "Show console messages, Used for debugging: " + message);
}
}); // End setWebChromeClient
}
// Return here when file selected from camera or from SDcard
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
if(requestCode==FILECHOOSER_RESULTCODE)
{
if (null == this.mUploadMessage) {
return;
}
Uri result=null;
try{
if (resultCode != RESULT_OK) {
result = null;
} else {
// retrieve from the private variable if the intent is null
result = intent == null ? mCapturedImageURI : intent.getData();
}
}
catch(Exception e)
{
Toast.makeText(getApplicationContext(), "activity :"+e,
Toast.LENGTH_LONG).show();
}
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
}
// Open previous opened link from history on webview when back button pressed
@Override
// Detect when the back button is pressed
public void onBackPressed() {
if(webView.canGoBack()) {
webView.goBack();
} else {
// Let the system handle the back button
super.onBackPressed();
}
}
}
通过
i.setType("*/*");