Question

我正在制作一个简单的应用。以下是代码：

Main xml：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >

<Button
    android:id="@+id/goButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true"
    android:background="@drawable/layout1"
    android:text="@string/go" />

<EditText
    android:id="@+id/urlField"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_toLeftOf="@+id/goButton"
    android:background="@drawable/layout1"
    android:ems="10" android:inputType="textUri"
    android:hint="@string/enter_school_name"> 

    <requestFocus />
</EditText>

<ProgressBar
    android:id="@+id/progressBar"
    style="?android:attr/progressBarStyleHorizontal"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentRight="true"
    android:layout_below="@+id/urlField" />

<WebView
    android:id="@+id/webView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentLeft="true"
    android:layout_below="@+id/progressBar" />

主Java：

    package com.nextgenintl.plusportals;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;

@SuppressLint("SetJavaScriptEnabled")
public class MainActivity extends Activity {
    private WebView webView;
    private EditText urlEditText;
    private ProgressBar progress;

    @Override
    public void onBackPressed() {
        if (webView.copyBackForwardList().getCurrentIndex() > 0) {
            webView.goBack();
        }
        else {
            // Your exit alert code, or alternatively line below to finish
            super.onBackPressed(); // finishes activity
        }
    }

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

        urlEditText = (EditText) findViewById(R.id.urlField);
        webView = (WebView) findViewById(R.id.webView);
        webView.setWebChromeClient(new MyWebViewClient());

        progress = (ProgressBar) findViewById(R.id.progressBar);
        progress.setMax(100);

        Button openUrl = (Button) findViewById(R.id.goButton);
        openUrl.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View view) {
                String url = urlEditText.getText().toString();
                String urlSchool = "https://www.plusportals.com/"+url;
                urlSchool = urlSchool.replace(" ", "");
                if (validateUrl(url)) {
                    webView.getSettings().setJavaScriptEnabled(true);
                    webView.loadUrl(urlSchool);

                    MainActivity.this.progress.setProgress(0);
                }
            }

            private boolean validateUrl(String url) {
                return true;
            }
        });

    }

    private class MyWebViewClient extends WebChromeClient {
        @Override
        public void onProgressChanged(WebView view, int newProgress) {         
            MainActivity.this.setValue(newProgress);
            super.onProgressChanged(view, newProgress);
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    public void setValue(int progress) {
        this.progress.setProgress(progress);       
    }
}

所以，我想保存用户输入 - 学校名称，所以你不必每次都输入它。但我无法弄明白 - 你能帮我吗？谢谢，如果你发给我完整的java文件。

Answer 1

您可以使用以下内容：

SharedPreferences sp = getSharedPreferences("your_prefs", Activity.MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
editor.putString("clever_title", urlEditText.getText().toString());
editor.commit();

然后当您下次打开应用时：

 SharedPreferences sp = getSharedPreferences("your_prefs", Activity.MODE_PRIVATE);
 urlEditText.text(sp.getString("clever_title", null);

保存edittext的状态

1 个答案: