アクティビティの背景に画像を追加して、インターネット接続がない場合に全画面画像も表示されるようにしようとしています。画像はありますが、表示できません。これは私のコードです。
public class MainActivity extends Activity {
private WebView webView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView = (WebView) findViewById(R.id.webview);
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
android.net.NetworkInfo wifi = cm
.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
android.net.NetworkInfo datac = cm
.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
if ((wifi != null & datac != null)
&& (wifi.isConnected() | datac.isConnected())) {
CookieManager cookieManager = CookieManager.getInstance();
cookieManager.setAcceptCookie(true);
webView = (WebView) findViewById(R.id.webview);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
MainActivity.this.setProgress(progress * 1000);
}
});
webView.setWebViewClient(new MyWebViewClient() {
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
Toast.makeText(MainActivity.this, "An error occurred " + description, Toast.LENGTH_LONG).show();
}
});
webView.loadUrl("http://mysite.com/?ma=1");
}
else{
this -----> ImageView iv = new ImageView(this);
iv.setImageResource(R.drawable.noconnect);
iv.setAdjustViewBounds(true);
Toast toast = Toast.makeText(MainActivity.this, "No Internet Connection", Toast.LENGTH_LONG);
toast.show();
}
}
private class MyWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (Uri.parse(url).getHost().equals("mysite.com")) {
return false;
}
// Otherwise, the link is not for a page on my site, so launch another Activity that handles URLs
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {
webView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case R.id.logout:
finish();
return true;
}
return false;
}
}
編集: これが XML です。このようにすると、読み込み時にクラッシュします。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/pmlayout" >
<ImageView
android:id="@+id/noconn"
android:background="@drawable/noconnect"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scaleType="matrix"
android:visibility="visible" >
</ImageView>
<WebView android:id="@+id/webview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</LinearLayout>
編集2：
これは、現在取得しているクラッシュ エラーです。
04-07 18:51:17.920: E/AndroidRuntime(8113): FATAL EXCEPTION: main
04-07 18:51:17.920: E/AndroidRuntime(8113): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.site.testapp/com.site.testapp.MainActivity}: java.lang.ClassCastException: android.widget.ImageView cannot be cast to android.webkit.WebView
04-07 18:51:17.920: E/AndroidRuntime(8113): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2088)
04-07 18:51:17.920: E/AndroidRuntime(8113): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2113)
04-07 18:51:17.920: E/AndroidRuntime(8113): at android.app.ActivityThread.access$700(ActivityThread.java:139)
04-07 18:51:17.920: E/AndroidRuntime(8113): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1224)
04-07 18:51:17.920: E/AndroidRuntime(8113): at android.os.Handler.dispatchMessage(Handler.java:99)
04-07 18:51:17.920: E/AndroidRuntime(8113): at android.os.Looper.loop(Looper.java:137)
04-07 18:51:17.920: E/AndroidRuntime(8113): at android.app.ActivityThread.main(ActivityThread.java:4918)
04-07 18:51:17.920: E/AndroidRuntime(8113): at java.lang.reflect.Method.invokeNative(Native Method)
04-07 18:51:17.920: E/AndroidRuntime(8113): at java.lang.reflect.Method.invoke(Method.java:511)
04-07 18:51:17.920: E/AndroidRuntime(8113): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
04-07 18:51:17.920: E/AndroidRuntime(8113): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
04-07 18:51:17.920: E/AndroidRuntime(8113): at dalvik.system.NativeStart.main(Native Method)
04-07 18:51:17.920: E/AndroidRuntime(8113): Caused by: java.lang.ClassCastException: android.widget.ImageView cannot be cast to android.webkit.WebView
04-07 18:51:17.920: E/AndroidRuntime(8113): at me.publicize.testapp.MainActivity.onCreate(MainActivity.java:30)
04-07 18:51:17.920: E/AndroidRuntime(8113): at android.app.Activity.performCreate(Activity.java:5048)
04-07 18:51:17.920: E/AndroidRuntime(8113): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
04-07 18:51:17.920: E/AndroidRuntime(8113): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2052)
04-07 18:51:17.920: E/AndroidRuntime(8113): ... 11 more