如何从Recycler View onClick缓存WebView活动的多个URL

Question

I have setup a WebViewActivity which gets the URL from the intent. I have setup an onClickListener for my Recyclerview which opens the WebViewActivity and loads the URL. However the WebView does not cache each an every page it opens. What changes should i make in the code?

WebViewActivity.java

public class WebViewActivity extends AppCompatActivity {

    WebView myWebView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_web_view);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        toolbar.setTitle("Search");

        toolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(getApplicationContext(), MainActivity.class));
            }
        });

        Intent intent = getIntent();
        String url = intent.getStringExtra("url");
        myWebView = (WebView) findViewById(R.id.webview);
        myWebView.setWebViewClient(new WebViewClient());
        WebSettings webSettings = myWebView.getSettings();
        myWebView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
        webSettings.setJavaScriptEnabled(true);
        myWebView.loadUrl(url);
    }

    @Override
    public void onBackPressed() {
        if(myWebView.canGoBack()){
            myWebView.goBack();
        }else{
            super.onBackPressed();
            finish();
        }
    }
}

ArticleAdapter.java

public class ArticleAdapter extends RecyclerView.Adapter<ArticleAdapter.ArticleViewHolder> {
    private static final String TAG = "ArticleAdapter";
    private Context mContext;
    private ArrayList<String> mlist;
    private String url;
    public ArticleAdapter(Context context, ArrayList<String> list) {
        mContext = context;
        mlist = list;
    }



    @Override
    public ArticleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        Log.d(TAG, "onCreateViewHolder: called");
        Log.d(TAG, "onCreateViewHolder: GOT REQUEST CALLED===================");
        LayoutInflater layoutInflater = LayoutInflater.from(mContext);
        View view = layoutInflater.inflate(R.layout.article_list, parent, false);
        return new ArticleViewHolder(view);

    }

    @Override
    public void onBindViewHolder(@NonNull final ArticleViewHolder articleViewHolder, int i) {
        if(mlist.size()!=0){
           url = mlist.get(articleViewHolder.getAdapterPosition());
           articleViewHolder.name.setText(url);
           articleViewHolder.name.setOnClickListener(new View.OnClickListener() {
               @Override
               public void onClick(View v) {
                    Intent intent = new Intent(mContext, WebViewActivity.class);
                    intent.putExtra("url", articleViewHolder.name.getText());
                    mContext.startActivity(intent);
               }
           });
        }
    }

    class ArticleViewHolder extends RecyclerView.ViewHolder {

        TextView name;

        public ArticleViewHolder(View itemView) {
            super(itemView);
            name = itemView.findViewById(R.id.tv_title);
        }

    }

    @Override
    public int getItemCount() {
        return mlist.size();
    }
}

Answer 1

You can write URL to the shared preference or file (with append mode), then whenever you need history just read the contents from the location

If you want cache web URLs then there is an option for WebView

Java code

webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
websettings.setAppCachePath(getContext().getCacheDir().toString());
websettings.setAppCacheEnabled(true);
websettings.setCacheMode(WebSettings.LOAD_DEFAULT);

this and this I have found useful, please refer these