我正在尝试在我的网络浏览器中添加书签并添加它但是，它只保存1个链接。例如，如果我在https://www.wikipedia.org/并保存此书签 然后我浏览维基百科并登陆此链接https://en.wikipedia.org/wiki/Portal:Featured_content 书签将在小吃店中显示删除，只保存1个链接并删除1个链接 我想保存两个链接。
public static final String PREFERENCES = "PREFERENCES_NAME";
public static final String WEB_LINKS = "links";
public static final String WEB_TITLE = "title";
String murl;
//
CoordinatorLayout coordinatorLayout;
private ProgressBar progressBar;
//
android.webkit.WebView webView;
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (event.getAction() == KeyEvent.ACTION_DOWN) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
if (webView.canGoBack()) {
webView.goBack();
} else {
finish();
}
return true;
}
}
return super.onKeyDown(keyCode, event);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_web_view);
webView = (android.webkit.WebView) findViewById(R.id.webview);
progressBar = findViewById(R.id.progressBar);
initWebview();
WebSettings settings = webView.getSettings();
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("");
toolbar.setNavigationIcon(R.drawable.ic_arrow_back);
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onBackPressed();
}
});
murl = getIntent().getExtras().getString("url");
coordinatorLayout = findViewById(R.id.main_content);
settings.setJavaScriptEnabled(true);
settings.setLoadWithOverviewMode(true);
settings.setUseWideViewPort(true);
settings.setSupportZoom(true);
// zoom
settings.setBuiltInZoomControls(true);
// zoom
settings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN);
settings.setDomStorageEnabled(true);
webView.setScrollBarStyle(webView.SCROLLBARS_OUTSIDE_OVERLAY);
webView.setScrollbarFadingEnabled(true);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
} else {
webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
webView.setWebViewClient(new WebViewClient());
webView.loadUrl(murl);
webView.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH);
webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
webView.getSettings().setAppCacheEnabled(true);
// webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
settings.setDomStorageEnabled(true);
// settings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
settings.setSaveFormData(true);
settings.setEnableSmoothTransition(true);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.saved, menu);
SharedPreferences sharedPreferences = getSharedPreferences(PREFERENCES, Context.MODE_PRIVATE);
String links = sharedPreferences.getString(WEB_LINKS, null);
if (links != null) {
Gson gson = new Gson();
ArrayList<String> linkList = gson.fromJson(links, new TypeToken<ArrayList<String>>() {
}.getType());
if (linkList.contains(murl)) {
menu.getItem(0).setIcon(R.drawable.bookmark);
} else {
menu.getItem(0).setIcon(R.drawable.bookmark);
}
} else {
menu.getItem(0).setIcon(R.drawable.bookmark);
}
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.action_bookmark) {
String message;
SharedPreferences sharedPreferences = getSharedPreferences(PREFERENCES, Context.MODE_PRIVATE);
String jsonLink = sharedPreferences.getString(WEB_LINKS, null);
String jsonTitle = sharedPreferences.getString(WEB_TITLE, null);
if (jsonLink != null && jsonTitle != null) {
Gson gson = new Gson();
ArrayList<String> linkList = gson.fromJson(jsonLink, new TypeToken<ArrayList<String>>() {
}.getType());
ArrayList<String> titleList = gson.fromJson(jsonTitle, new TypeToken<ArrayList<String>>() {
}.getType());
if (linkList.contains(murl)) {
linkList.remove(murl);
titleList.remove(webView.getTitle().trim());
Editor editor = sharedPreferences.edit();
editor.putString(WEB_LINKS, new Gson().toJson(linkList));
editor.putString(WEB_TITLE, new Gson().toJson(titleList));
editor.apply();
message = "removed";
} else {
linkList.add(murl);
titleList.add(webView.getTitle().trim());
Editor editor = sharedPreferences.edit();
editor.putString(WEB_LINKS, new Gson().toJson(linkList));
editor.putString(WEB_TITLE, new Gson().toJson(titleList));
editor.apply();
message = "Saved";
}
} else {
ArrayList<String> linkList = new ArrayList<>();
ArrayList<String> titleList = new ArrayList<>();
linkList.add(murl);
titleList.add(webView.getTitle());
Editor editor = sharedPreferences.edit();
editor.putString(WEB_LINKS, new Gson().toJson(linkList));
editor.putString(WEB_TITLE, new Gson().toJson(titleList));
editor.apply();
message = "Saved";
}
Snackbar snackbar = Snackbar.make(coordinatorLayout, message, Snackbar.LENGTH_LONG);
snackbar.show();
invalidateOptionsMenu();
}
return super.onOptionsItemSelected(item);
}
private void initWebview() {
webView.setWebViewClient(new WebViewClient() {
@Override
public void onPageStarted(android.webkit.WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
progressBar.setVisibility(View.VISIBLE);
murl = url;
invalidateOptionsMenu();
}
@Override
public boolean shouldOverrideUrlLoading(android.webkit.WebView view, String url) {
webView.loadUrl(url);
return true;
}
@Override
public boolean shouldOverrideUrlLoading(android.webkit.WebView view, WebResourceRequest request) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
webView.loadUrl(request.getUrl().toString());
}
return true;
}
@Override
public void onPageFinished(android.webkit.WebView view, String url) {
super.onPageFinished(view, url);
progressBar.setVisibility(View.GONE);
invalidateOptionsMenu();
}
@Override
public void onReceivedError(android.webkit.WebView view, WebResourceRequest request, WebResourceError error) {
super.onReceivedError(view, request, error);
progressBar.setVisibility(View.GONE);
invalidateOptionsMenu();
}
});
}
}
xml file :
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<WebView
android:id="@+id/webview"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<ProgressBar
android:id="@+id/progressBar"
style="@style/Widget.AppCompat.ProgressBar.Horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="-7dp"
android:indeterminate="true"
android:visibility="gone"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>