在Facebook上分享的问题在于它只接受 EXTRA_TEXT 中的URL。原生FB应用程序将从该URL获取文本和图像来组成帖子。这不是“bug”,而是他们给官方应用程序的预期行为:-/
请注意,Twitter只接受纯文本格式,没有任何标记,并且最多可以有144个字符。
我自己制作了一个“分享”对话框来拦截所有不同的行为,并向每个目标意图提供它们所接受的内容:HTML、纯文本、FB URL和Twitter短文本。
以下是代码:
public class ShareHelper implements AdapterView.OnItemClickListener {
private static final String TAG = ShareHelper.class.getSimpleName();
private Activity mContext;
private Dialog mDialog;
private LayoutInflater mInflater;
private GridView mGrid;
private ShareIntentAdapter mAdapter;
private int mMaxColumns;
private List<ResolveInfo> plainTextActivities;
private Set<String> htmlActivitiesPackages;
private String subject;
private String textbody;
private CharSequence htmlbody;
private String twitterBody;
private String facebookBody;
public ShareHelper(Activity context, String subject, String textbody, CharSequence htmlbody, String twitterBody, String facebookBody) {
this.mContext = context;
this.subject = subject;
this.textbody = textbody;
this.htmlbody = htmlbody;
this.twitterBody = twitterBody;
this.facebookBody = facebookBody;
}
@SuppressLint("NewApi")
public void share() {
this.mInflater = LayoutInflater.from(mContext);
final Intent sendIntent = new Intent(android.content.Intent.ACTION_SEND);
sendIntent.setType(HTTP.PLAIN_TEXT_TYPE);
plainTextActivities = mContext.getPackageManager().queryIntentActivities(sendIntent, 0);
if (plainTextActivities.size() > 0) {
htmlActivitiesPackages = new HashSet<String>();
sendIntent.setType("text/html");
final List<ResolveInfo> htmlActivities = mContext.getPackageManager().queryIntentActivities(sendIntent, 0);
for (ResolveInfo resolveInfo : htmlActivities) {
htmlActivitiesPackages.add(resolveInfo.activityInfo.packageName);
}
mAdapter = new ShareIntentAdapter();
final View chooserView = mInflater.inflate(R.layout.dialog_share_us_chooser, null);
mGrid = (GridView) chooserView.findViewById(R.id.resolver_grid);
mGrid.setAdapter(mAdapter);
mGrid.setOnItemClickListener(this);
mMaxColumns = mContext.getResources().getInteger(R.integer.maxResolverActivityColumns);
mGrid.setNumColumns(Math.min(plainTextActivities.size(), mMaxColumns));
AlertDialog.Builder builder;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
builder = new AlertDialog.Builder(mContext, AlertDialog.THEME_DEVICE_DEFAULT_LIGHT);
} else {
builder = new AlertDialog.Builder(mContext);
}
builder.setTitle(R.string.text_share_us_title);
builder.setView(chooserView);
mDialog = builder.create();
mDialog.show();
} else {
Toast.makeText(mContext, "No social apps installed to share ChurchLink!", Toast.LENGTH_LONG).show();
}
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
ResolveInfo info = (ResolveInfo) mAdapter.getItem(position);
Intent intent = new Intent(android.content.Intent.ACTION_SEND);
intent.setClassName(info.activityInfo.packageName, info.activityInfo.name);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_TITLE, subject);
intent.putExtra(Intent.EXTRA_SUBJECT, subject);
if (info.activityInfo.packageName.contains("facebook")) {
intent.putExtra(Intent.EXTRA_TEXT, facebookBody);
} else if (info.activityInfo.packageName.contains("twitter")) {
intent.putExtra(Intent.EXTRA_TEXT, twitterBody);
} else if (htmlActivitiesPackages.contains(info.activityInfo.packageName)) {
intent.putExtra(Intent.EXTRA_TEXT, htmlbody);
} else {
intent.putExtra(Intent.EXTRA_TEXT, textbody);
}
Log.d(TAG, info.activityInfo.packageName);
((Activity) mContext).startActivity(intent);
mDialog.dismiss();
}
public class ShareIntentAdapter extends BaseAdapter {
public ShareIntentAdapter() {
super();
}
@Override
public int getCount() {
return plainTextActivities != null? plainTextActivities.size() : 0;
}
@Override
public ResolveInfo getItem(int position) {
return plainTextActivities.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view;
if (convertView == null) {
view = mInflater.inflate(R.layout.griditem_share_us, parent, false);
} else {
view = convertView;
}
bindView(view, plainTextActivities.get(position));
return view;
}
private final void bindView(View view, ResolveInfo info) {
TextView text = (TextView)view.findViewById(android.R.id.text1);
ImageView icon = (ImageView)view.findViewById(android.R.id.icon);
text.setText(info.activityInfo.applicationInfo.loadLabel(mContext.getPackageManager()).toString());
icon.setImageDrawable(info.activityInfo.applicationInfo.loadIcon(mContext.getPackageManager()));
}
}
}
看起来有些人也想要布局文件。以下是它们:
dialog_share_us_chooser.xml
<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/resolver_grid"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="center"
android:clipToPadding="false"
android:columnWidth="128dp"
android:numColumns="4"
android:padding="16dp"
android:scrollbarStyle="outsideOverlay" />
griditem_share_us.xml(来自自己的AOSP项目):
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:gravity="center"
android:orientation="vertical"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:padding="16dp">
<ImageView android:id="@android:id/icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scaleType="fitCenter" />
<TextView android:id="@android:id/text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:minLines="2"
android:maxLines="2"
android:paddingLeft="4dip"
android:paddingRight="4dip" />
</LinearLayout>