Java tutorial
package android.app.assist; import android.annotation.UnsupportedAppUsage; import android.content.ClipData; import android.content.Intent; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.os.Parcel; import android.os.Parcelable; /** * Holds information about the content an application is viewing, to hand to an * assistant at the user's request. This is filled in by * {@link android.app.Activity#onProvideAssistContent Activity.onProvideAssistContent}. */ public class AssistContent implements Parcelable { @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private boolean mIsAppProvidedIntent = false; private boolean mIsAppProvidedWebUri = false; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private Intent mIntent; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private String mStructuredData; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private ClipData mClipData; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private Uri mUri; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private final Bundle mExtras; public AssistContent() { mExtras = new Bundle(); } /** * @hide * Called by {@link android.app.ActivityThread} to set the default Intent based on * {@link android.app.Activity#getIntent Activity.getIntent}. * * <p>Automatically populates {@link #mUri} if that Intent is an {@link Intent#ACTION_VIEW} * of a web (http or https scheme) URI.</p> */ public void setDefaultIntent(Intent intent) { mIntent = intent; mIsAppProvidedIntent = false; mIsAppProvidedWebUri = false; mUri = null; if (intent != null && Intent.ACTION_VIEW.equals(intent.getAction())) { Uri uri = intent.getData(); if (uri != null) { if ("http".equals(uri.getScheme()) || "https".equals(uri.getScheme())) { mUri = uri; } } } } /** * Sets the Intent associated with the content, describing the current top-level context of * the activity. If this contains a reference to a piece of data related to the activity, * be sure to set {@link Intent#FLAG_GRANT_READ_URI_PERMISSION} so the accessibility * service can access it. */ public void setIntent(Intent intent) { mIsAppProvidedIntent = true; mIntent = intent; } /** * Returns the current {@link #setIntent} if one is set, else the default Intent obtained from * {@link android.app.Activity#getIntent Activity.getIntent}. Can be modified in-place. */ public Intent getIntent() { return mIntent; } /** * Returns whether or not the current Intent was explicitly provided in * {@link android.app.Activity#onProvideAssistContent Activity.onProvideAssistContent}. If not, * the Intent was automatically set based on * {@link android.app.Activity#getIntent Activity.getIntent}. */ public boolean isAppProvidedIntent() { return mIsAppProvidedIntent; } /** * Optional additional content items that are involved with * the current UI. Access to this content will be granted to the assistant as if you * are sending it through an Intent with {@link Intent#FLAG_GRANT_READ_URI_PERMISSION}. */ public void setClipData(ClipData clip) { mClipData = clip; } /** * Return the current {@link #setClipData}, which you can modify in-place. */ public ClipData getClipData() { return mClipData; } /** * Sets optional structured data regarding the content being viewed. The provided data * must be a string represented with <a href="http://json-ld.org/">JSON-LD</a> using the * <a href="http://schema.org/">schema.org</a> vocabulary. */ public void setStructuredData(String structuredData) { mStructuredData = structuredData; } /** * Returns the current {@link #setStructuredData}. */ public String getStructuredData() { return mStructuredData; } /** * Set a web URI associated with the current data being shown to the user. * This URI could be opened in a web browser, or in the app as an * {@link Intent#ACTION_VIEW} Intent, to show the same data that is currently * being displayed by it. The URI here should be something that is transportable * off the device into other environments to acesss the same data as is currently * being shown in the app; if the app does not have such a representation, it should * leave the null and only report the local intent and clip data. */ public void setWebUri(Uri uri) { mIsAppProvidedWebUri = true; mUri = uri; } /** * Return the content's web URI as per {@link #setWebUri(android.net.Uri)}, or null if * there is none. */ public Uri getWebUri() { return mUri; } /** * Returns whether or not the current {@link #getWebUri} was explicitly provided in * {@link android.app.Activity#onProvideAssistContent Activity.onProvideAssistContent}. If not, * the Intent was automatically set based on * {@link android.app.Activity#getIntent Activity.getIntent}. */ public boolean isAppProvidedWebUri() { return mIsAppProvidedWebUri; } /** * Return Bundle for extra vendor-specific data that can be modified and examined. */ public Bundle getExtras() { return mExtras; } @UnsupportedAppUsage AssistContent(Parcel in) { if (in.readInt() != 0) { mIntent = Intent.CREATOR.createFromParcel(in); } if (in.readInt() != 0) { mClipData = ClipData.CREATOR.createFromParcel(in); } if (in.readInt() != 0) { mUri = Uri.CREATOR.createFromParcel(in); } if (in.readInt() != 0) { mStructuredData = in.readString(); } mIsAppProvidedIntent = in.readInt() == 1; mExtras = in.readBundle(); mIsAppProvidedWebUri = in.readInt() == 1; } @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) void writeToParcelInternal(Parcel dest, int flags) { if (mIntent != null) { dest.writeInt(1); mIntent.writeToParcel(dest, flags); } else { dest.writeInt(0); } if (mClipData != null) { dest.writeInt(1); mClipData.writeToParcel(dest, flags); } else { dest.writeInt(0); } if (mUri != null) { dest.writeInt(1); mUri.writeToParcel(dest, flags); } else { dest.writeInt(0); } if (mStructuredData != null) { dest.writeInt(1); dest.writeString(mStructuredData); } else { dest.writeInt(0); } dest.writeInt(mIsAppProvidedIntent ? 1 : 0); dest.writeBundle(mExtras); dest.writeInt(mIsAppProvidedWebUri ? 1 : 0); } @Override public int describeContents() { return 0; } @Override public void writeToParcel(Parcel dest, int flags) { writeToParcelInternal(dest, flags); } public static final Parcelable.Creator<AssistContent> CREATOR = new Parcelable.Creator<AssistContent>() { public AssistContent createFromParcel(Parcel in) { return new AssistContent(in); } public AssistContent[] newArray(int size) { return new AssistContent[size]; } }; }