Settings - add support for Launch by Default

- implement UX spec

Change-Id: I7ee8962f83983273d809e0ef6fc81b0eb2df15dd

src/com/android/settings/applications/ClearDefaultsPreference.java

@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.applications;
+
+import android.appwidget.AppWidgetManager;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.hardware.usb.IUsbManager;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.os.UserHandle;
+import android.preference.Preference;
+import android.text.SpannableString;
+import android.text.TextUtils;
+import android.text.style.BulletSpan;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.android.settings.R;
+import com.android.settings.Utils;
+
+public class ClearDefaultsPreference extends Preference {
+
+    protected static final String TAG = ClearDefaultsPreference.class.getSimpleName();
+
+    private View mRootView;
+    private Button mActivitiesButton;
+
+    private AppWidgetManager mAppWidgetManager;
+    private IUsbManager mUsbManager;
+    private PackageManager mPm;
+    private String mPackageName;
+    protected ApplicationsState.AppEntry mAppEntry;
+
+    public ClearDefaultsPreference(Context context, AttributeSet attrs, int defStyleAttr,
+            int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+
+        setLayoutResource(R.layout.app_preferred_settings);
+
+        mAppWidgetManager = AppWidgetManager.getInstance(context);
+        mPm = context.getPackageManager();
+        IBinder b = ServiceManager.getService(Context.USB_SERVICE);
+        mUsbManager = IUsbManager.Stub.asInterface(b);
+    }
+
+    public ClearDefaultsPreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        this(context, attrs, defStyleAttr, 0);
+    }
+
+    public ClearDefaultsPreference(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public ClearDefaultsPreference(Context context) {
+        this(context, null);
+    }
+
+    public void setPackageName(String packageName) {
+        mPackageName = packageName;
+    }
+
+    public void setAppEntry(ApplicationsState.AppEntry entry) {
+        mAppEntry = entry;
+    }
+
+    @Override
+    protected View onCreateView(ViewGroup parent) {
+        mRootView = super.onCreateView(parent);
+
+        mActivitiesButton = (Button) mRootView.findViewById(R.id.clear_activities_button);
+        mActivitiesButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (mUsbManager != null) {
+                    mPm.clearPackagePreferredActivities(mPackageName);
+                    try {
+                        mUsbManager.clearDefaults(mPackageName, UserHandle.myUserId());
+                    } catch (RemoteException e) {
+                        Log.e(TAG, "mUsbManager.clearDefaults", e);
+                    }
+                    mAppWidgetManager.setBindAppWidgetPermission(mPackageName, false);
+                    TextView autoLaunchView = (TextView) mRootView.findViewById(R.id.auto_launch);
+                    resetLaunchDefaultsUi(autoLaunchView);
+                }
+            }
+        });
+
+        return mRootView;
+    }
+
+    @Override
+    protected void onBindView(View view) {
+        super.onBindView(view);
+
+        updateUI();
+    }
+
+    public boolean updateUI() {
+        boolean hasBindAppWidgetPermission =
+                mAppWidgetManager.hasBindAppWidgetPermission(mAppEntry.info.packageName);
+
+        TextView autoLaunchView = (TextView) mRootView.findViewById(R.id.auto_launch);
+        boolean autoLaunchEnabled = Utils.hasPreferredActivities(mPm, mPackageName)
+                || Utils.hasUsbDefaults(mUsbManager, mPackageName);
+        if (!autoLaunchEnabled && !hasBindAppWidgetPermission) {
+            resetLaunchDefaultsUi(autoLaunchView);
+        } else {
+            boolean useBullets = hasBindAppWidgetPermission && autoLaunchEnabled;
+
+            if (hasBindAppWidgetPermission) {
+                autoLaunchView.setText(R.string.auto_launch_label_generic);
+            } else {
+                autoLaunchView.setText(R.string.auto_launch_label);
+            }
+
+            Context context = getContext();
+            CharSequence text = null;
+            int bulletIndent = context.getResources().getDimensionPixelSize(
+                    R.dimen.installed_app_details_bullet_offset);
+            if (autoLaunchEnabled) {
+                CharSequence autoLaunchEnableText = context.getText(
+                        R.string.auto_launch_enable_text);
+                SpannableString s = new SpannableString(autoLaunchEnableText);
+                if (useBullets) {
+                    s.setSpan(new BulletSpan(bulletIndent), 0, autoLaunchEnableText.length(), 0);
+                }
+                text = (text == null) ?
+                        TextUtils.concat(s, "\n") : TextUtils.concat(text, "\n", s, "\n");
+            }
+            if (hasBindAppWidgetPermission) {
+                CharSequence alwaysAllowBindAppWidgetsText =
+                        context.getText(R.string.always_allow_bind_appwidgets_text);
+                SpannableString s = new SpannableString(alwaysAllowBindAppWidgetsText);
+                if (useBullets) {
+                    s.setSpan(new BulletSpan(bulletIndent),
+                            0, alwaysAllowBindAppWidgetsText.length(), 0);
+                }
+                text = (text == null) ?
+                        TextUtils.concat(s, "\n") : TextUtils.concat(text, "\n", s, "\n");
+            }
+            autoLaunchView.setText(text);
+            mActivitiesButton.setEnabled(true);
+        }
+        return true;
+    }
+
+    private void resetLaunchDefaultsUi(TextView autoLaunchView) {
+        autoLaunchView.setText(R.string.auto_launch_disable_text);
+        // Disable clear activities button
+        mActivitiesButton.setEnabled(false);
+    }
+}