Android:如何在新屏幕中打开WebView

Question

我在 screen1.xml 中有四个图像按钮。 我已经在 screen3.xml 中定义了 webview。 如果我单击 ImageButton1 或其他按钮，相应的 URL(在 Web View 中)应加载到 screen3.xml 中。

我尝试这样做，但它引发了强制关闭错误。但是如果我尝试使用 screen1.xml 中定义的 webview 进行相同的操作，它会起作用。但问题是图像按钮和网页 View 出现在同一页面中，并且它们重叠，看起来很糟糕!

请帮我在新屏幕中打开 WebView 。

顺便说一句，addView 可以用于此目的吗？

public class click extends Activity 
{
 private WebView webView;
    public void onCreate(Bundle savedInstanceState) 
    {
     super.onCreate(savedInstanceState);
        setContentView(R.layout.screen1);

        webView = (WebView) findViewById(R.id.web_view);
        ImageButton i1 = (ImageButton) findViewById(R.id.imagebutton1);
        ImageButton i2 = (ImageButton) findViewById(R.id.imagebutton2);
        ImageButton i3 = (ImageButton) findViewById(R.id.imagebutton3);
        ImageButton i4 = (ImageButton) findViewById(R.id.imagebutton4);
 }
private void openBrowser1() 
     {

      webView.getSettings().setJavaScriptEnabled(true);

      webView.loadUrl("myurl");
     }

public void myClickHandler1(View view) 
        {

         openBrowser1();
        }

Screen1.xml

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

  <WebView
android:id="@+id/web_view"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1.0" />



 <ImageButton android:id="@+id/imagebutton1" android:clickable="true" android:onClick="myClickHandler1" 
 android:layout_width="130dip" android:background="@null" android:layout_height="130dip" android:layout_x="21dip" 
 android:layout_y="61dip" ></ImageButton>

 <ImageButton android:id="@+id/imagebutton2" android:clickable="true" android:onClick="myClickHandler2" 
 android:layout_width="130dip" android:background="@null"  android:layout_height="130dip" android:layout_x="171dip" 
 android:layout_y="61dip" ></ImageButton>

 <ImageButton android:id="@+id/imagebutton3" android:clickable="true" android:onClick="myClickHandler3" 
 android:layout_width="130dip" android:background="@null" android:layout_height="130dip" android:layout_x="21dip" 
 android:layout_y="241dip" ></ImageButton>

 <ImageButton android:id="@+id/imagebutton4" android:clickable="true" android:onClick="myClickHandler4" 
 android:layout_width="130dip" android:background="@null"  android:layout_height="130dip" android:layout_x="171dip" 
 android:layout_y="241dip" ></ImageButton>
</AbsoluteLayout> 

screen3.xml

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >                 

<WebView
android:id="@+id/web_view"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1.0" />

</AbsoluteLayout> 

Answer 1

我认为您需要对代码进行一些修复...

public class click extends Activity {

    private WebView webView;    

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.screen1);

        webView = (WebView) findViewById(R.id.web_view);        
        ImageButton i1 = (ImageButton) findViewById(R.id.imagebutton1);
        ImageButton i2 = (ImageButton) findViewById(R.id.imagebutton2);
        ImageButton i3 = (ImageButton) findViewById(R.id.imagebutton3);
        ImageButton i4 = (ImageButton) findViewById(R.id.imagebutton4);

        WebSettings webSettings = webView.getSettings();
        webSettings.setSavePassword(false);
        webSettings.setSaveFormData(false);
        webSettings.setJavaScriptEnabled(true);
        webSettings.setSupportZoom(false);
        webView.loadUrl("http://www.reforma.com");

        //Add a listener to ImageButton1
        i1.setOnClickListener(new OnClickListener() {                       
            @Override
            public void onClick(View v) {
                openBrowser1();
            }           
        });                             

    }

    private void openBrowser1() 
    {       
       //this intent is used to open other activity wich contains another webView
        Intent intent = new Intent(click.this,SecondActivity.class);
        startActivity(intent); 
    }

}

screen1.xml

  <WebView
android:id="@+id/web_view"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1" />

 <ImageButton android:id="@+id/imagebutton1" android:clickable="true"  
 android:layout_width="130dip" android:layout_height="130dip" android:layout_x="21dip" 
 android:layout_y="61dip" ></ImageButton>

 <ImageButton android:id="@+id/imagebutton2" android:clickable="true"  
 android:layout_width="130dip" android:layout_height="130dip" android:layout_x="171dip" 
 android:layout_y="61dip" ></ImageButton>

 <ImageButton android:id="@+id/imagebutton3" android:clickable="true"  
 android:layout_width="130dip" android:layout_height="130dip" android:layout_x="21dip" 
 android:layout_y="241dip" ></ImageButton>

 <ImageButton android:id="@+id/imagebutton4" android:clickable="true"  
 android:layout_width="130dip"  android:layout_height="130dip" android:layout_x="171dip" 
 android:layout_y="241dip" ></ImageButton>
</AbsoluteLayout> 

添加一个新 Activity ，其中包含应加载网页的网页 View !

public class SecondActivity extends Activity {

    private WebView webView;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.screen3);

        webView = (WebView) findViewById(R.id.web_view);
        WebSettings webSettings = webView.getSettings();
        webSettings.setSavePassword(false);
        webSettings.setSaveFormData(false);
        webSettings.setJavaScriptEnabled(true);
        webSettings.setSupportZoom(false);
        webView.loadUrl("http://www.reforma.com");         

    }

 }

screen3.xml

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >                 

<WebView
android:id="@+id/web_view"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1" />

</AbsoluteLayout> 

将第二个 Activity 添加到 AndroidManifest.xml

   <activity android:name=".SecondActivity"
          android:label="SecondActivity"/> 

并且您必须拥有 Internet 权限才能加载网页...

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

有什么疑问吗？？？

若尔赫西斯