我有Activity（ListView），它打开了包含WebView的子活动。然后我从WebView打开共享对话框。但是当我按下“返回”按钮时，它会关闭共享对话框和子活动。如何使“后退”按钮仅关闭共享对话框？
非常感谢！
public class Journal extends Activity {
private ViewFlow viewFlow;
int page = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.circle_layout);
page = getIntent().getExtras().getInt("new_page");
viewFlow = (ViewFlow) findViewById(R.id.viewflow);
viewFlow.setAdapter(new JournalAdapter(this, page), 0);
CircleFlowIndicator indic = (CircleFlowIndicator) findViewById(R.id.viewflowindic);
viewFlow.setFlowIndicator(indic);
}
}
public class JournalAdapter extends BaseAdapter {
...
@Override
public View getView(int position, View convertView, ViewGroup parent) {
int _id = 0, rid = 0;
int N = num;
String url = "http://lookuper.ru/LookuperServer/journal/URL/index.html";
if (position == 0) {
_id = R.id.wv1;
rid = R.layout.webview_1;
}
url = url.replace("URL", String.valueOf(num - position));
Tools.messageToLog(" =~= getView() :: num = " + (num + position) + "; pos = " + position + "; URL = " + url);
convertView = mInflater.inflate(rid, null);
final WebView wv = (WebView) convertView.findViewById(_id);
wv.setWebChromeClient(new WebChromeClient());
wv.setPadding(0, 0, 0, 0);
wv.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
wv.requestFocus(View.FOCUS_DOWN|View.FOCUS_UP);
wv.getSettings().setLightTouchEnabled(true);
// wv.getSettings().setLayoutAlgorithm(LayoutAlgorithm.NORMAL);
wv.getSettings().setUseWideViewPort(true);
wv.getSettings().setLoadWithOverviewMode(true);
wv.getSettings().setJavaScriptEnabled(true);
wv.addJavascriptInterface(new Object() {
public void performClick() {
showShare("Product", "http://product.com");
}
}, "share");
wv.addJavascriptInterface(new Object() {
public void performClick() {
((Activity) context).finish();
}
}, "closeActivity");
wv.loadUrl(url);
final Activity MyActivity = (Activity) context;
final ProgressBar v = (ProgressBar) MyActivity.findViewById(R.id.ProgressBar01);
wv.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
v.setProgress(progress * 100);
if (progress == 100)
v.setVisibility(ProgressBar.GONE);
}
});
wv.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_UP:
if (!v.hasFocus()) {
v.requestFocus();
}
break;
}
return false;
}
});
return convertView;
}
private void showShare(String subject, String URL) {
List<Intent> targetedShareIntents = new ArrayList<Intent>();
Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND);
shareIntent.setType("text/plain");
shareIntent.setFlags(Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED | Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
Intent vk = null, tw = null, wa = null, gm = null, mms = null, mail = null, fb = null;
List<ResolveInfo> resInfo = context.getPackageManager().queryIntentActivities(shareIntent, 0);
if (!resInfo.isEmpty()) {
for (ResolveInfo resolveInfo : resInfo) {
String packageName = resolveInfo.activityInfo.packageName;
Intent targetedShareIntent = new Intent(android.content.Intent.ACTION_SEND);
targetedShareIntent.setType("text/plain");
targetedShareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, subject);
if (packageName.contains("com.facebook.katana")) {
targetedShareIntent.putExtra(android.content.Intent.EXTRA_TEXT, URL);
targetedShareIntent.setPackage(packageName);
fb = targetedShareIntent;
} else if (packageName.contains("com.vkontakte.android")) {
targetedShareIntent.putExtra(android.content.Intent.EXTRA_TEXT, URL);
targetedShareIntent.setPackage(packageName);
vk = targetedShareIntent;
} else if (packageName.equalsIgnoreCase("com.google.android.gm")) {
targetedShareIntent.putExtra(android.content.Intent.EXTRA_TEXT, URL);
targetedShareIntent.setPackage(packageName);
gm = targetedShareIntent;
} else if (packageName.contains("com.whatsapp")) {
targetedShareIntent.putExtra(android.content.Intent.EXTRA_TEXT, URL);
targetedShareIntent.setPackage(packageName);
wa = targetedShareIntent;
} else if (packageName.contains("mail")) {
targetedShareIntent.putExtra(android.content.Intent.EXTRA_TEXT, URL);
targetedShareIntent.setPackage(packageName);
mail = targetedShareIntent;
} else if (packageName.contains("com.android.mms")) {
targetedShareIntent.putExtra(android.content.Intent.EXTRA_TEXT, URL);
targetedShareIntent.setPackage(packageName);
mms = targetedShareIntent;
} else if (packageName.contains("com.twitter.android")) {
targetedShareIntent.putExtra(android.content.Intent.EXTRA_TEXT, URL);
targetedShareIntent.setPackage(packageName);
tw = targetedShareIntent;
}
}
Intent chooserIntent = Intent.createChooser(mms, "VK");
Parcelable [] parcelable = new Parcelable [6];
parcelable[0] = new LabeledIntent(vk, "com.vkontakte.android", "VK", 0);
parcelable[1] = fb;
parcelable[2] = tw;
parcelable[3] = wa;
parcelable[4] = gm;
parcelable[5] = mail;
Parcelable p [] = targetedShareIntents.toArray(new Parcelable[] {});
for (int i = 0; i < p.length; i++) {
Tools.messageToLog(" >=< PN = " + p[i].toString());
}
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, parcelable);
chooserIntent.setAction("android.intent.action.MAIN");
((Activity) context).startActivityForResult(shareIntent, 0);
// context.startActivity(shareIntent);
}
}
}
XML：
cyrcle_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ProgressBar
android:id="@+id/ProgressBar01"
android:layout_width="fill_parent"
android:layout_height="3dp"
android:indeterminateDrawable="@android:drawable/progress_indeterminate_horizontal"
android:indeterminateOnly="false"
android:maxHeight="20dip"
android:minHeight="20dip"
android:progressDrawable="@android:drawable/progress_horizontal" >
</ProgressBar>
<com.postuchat.lookuper.UI.custom.viewflow.CircleFlowIndicator
android:id="@+id/viewflowindic"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:paddingTop="10dp" />
<com.postuchat.lookuper.UI.custom.viewflow.ViewFlow
android:id="@+id/viewflow"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
<ImageButton
android:id="@+id/ib1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:paddingTop="10dp"
android:src="@drawable/smiley_button"
android:contentDescription="tests"
/>
</FrameLayout>
web_view1.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingTop="20dp" >
<WebView
android:id="@+id/wv1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animationCache="false"
android:soundEffectsEnabled="false"
/>
</LinearLayout>
答案 0 :(得分：1)
在您的活动类中覆盖onKeyDown事件并执行您想要的操作。
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK)) {
// close dialoge here
return true;
}
return super.onKeyDown(keyCode, event);
}