嗨，我最近开始在Rails网站上为我的ruby构建一个android应用程序。我俩都是新手，所以一团糟。 Atm我陷入困境是因为我的应用尝试添加下拉刷新并开始使用Intent后停止显示我的Webview。
这是我的MainActivity.java
package biz.bdtp.bpin;
import android.support.v7.app.AppCompatActivity;
//import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.content.Intent;
import android.net.Uri;
import java.util.ArrayList;
import android.os.AsyncTask;
import android.widget.ProgressBar;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshWebView;
public class MainActivity extends AppCompatActivity {
public WebView webb;
ProgressBar progressBar;
@Override
public void onBackPressed() {
if (webb.canGoBack()) {
webb.goBack();
} else {
super.onBackPressed();
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webb = (WebView) findViewById(R.id.web1);
progressBar = (ProgressBar) findViewById(R.id.progressBar1);
webb.setWebViewClient(new WebViewClient());
webb.getSettings().setJavaScriptEnabled(true);
webb.getSettings().setBuiltInZoomControls(true);
webb.getSettings().setDisplayZoomControls(false);
String url = "http://www.bdtp.biz:3000";
webb.loadUrl(url);
// Get intent, action and MIME type
Intent intent = getIntent();
String action = intent.getAction();
String type = intent.getType();
if (Intent.ACTION_SEND.equals(action) && type != null) {
if ("text/plain".equals(type)) {
handleSendText(intent); // Handle text being sent
} else if (type.startsWith("image/")) {
handleSendImage(intent); // Handle single image being sent
}
} else if (Intent.ACTION_SEND_MULTIPLE.equals(action) && type != null) {
if (type.startsWith("image/")) {
handleSendMultipleImages(intent); // Handle multiple images being sent
}
} else {
// Handle other intents, such as being started from the home screen
}
}
void handleSendText(Intent intent) {
String sharedText = intent.getStringExtra(Intent.EXTRA_TEXT);
if (sharedText != null) {
// Update UI to reflect text being shared
}
}
void handleSendImage(Intent intent) {
Uri imageUri = intent.getParcelableExtra(Intent.EXTRA_STREAM);
if (imageUri != null) {
// Update UI to reflect image being shared
}
}
void handleSendMultipleImages(Intent intent) {
ArrayList<Uri> imageUris = intent.getParcelableArrayListExtra(Intent.EXTRA_STREAM);
if (imageUris != null) {
// Update UI to reflect multiple images being shared
}
// Set a listener to be invoked when the list should be refreshed.
PullToRefreshWebView pullToRefreshView = (PullToRefreshWebView) findViewById(R.id.pull_to_refresh_webview);
pullToRefreshView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener<WebView>() {
@Override
public void onRefresh(PullToRefreshBase<WebView> refreshView) {
// Do work to refresh the list here.
new GetDataTask(refreshView).execute();
}
});
}
private class GetDataTask extends AsyncTask<Void, Void, String[]> {
PullToRefreshBase<?> mRefreshedView;
private GetDataTask(PullToRefreshBase<?> refreshedView) {
mRefreshedView = refreshedView;
}
@Override
protected String[] doInBackground(Void... params) {
// Simulates a background job.
try {
Thread.sleep(4000);
} catch (InterruptedException e) {
}
return null;
}
@Override
protected void onPostExecute(String[] result) {
// Call onRefreshComplete when the list has been refreshed.
mRefreshedView.onRefreshComplete();
super.onPostExecute(result);
}
}
private class MyWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
}
这是我的activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<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="biz.bdtp.bpin.MainActivity">
<ProgressBar
android:layout_centerHorizontal="true"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_gravity="center_vertical|center_horizontal"
android:id="@+id/progressBar1"/>
<WebView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/web1"
android:layout_alignParentEnd="true"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:layout_alignParentBottom="true" />
<com.handmark.pulltorefresh.library.PullToRefreshWebView
android:id="@+id/pull_to_refresh_webview"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:cacheColorHint="#00000000"
android:divider="#19000000"
android:dividerHeight="4dp"
android:fadingEdge="none"
android:fastScrollEnabled="false"
android:footerDividersEnabled="false"
android:headerDividersEnabled="false"
android:scrollbars="none"
android:smoothScrollbar="true"
/>
</RelativeLayout>
这是我的清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="biz.bdtp.bpin">
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name="MainActivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.SEND" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="image/*" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.SEND" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="text/plain" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.SEND_MULTIPLE" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="image/*" />
</intent-filter>
</activity>
</application>
</manifest>
在此先感谢，我很少在任何地方发帖。但有点卡住了，终于摆脱了所有错误，所以我不确定Google还有什么:)
最佳答案
将WebView包裹在PullToRefreshWebView内。创建布局文件结构：
<com.handmark.pulltorefresh.library.PullToRefreshWebView>
<WebView />
</com.handmark.pulltorefresh.library.PullToRefreshWebView>