Launcher modification-Get Application List launcher source code parsing

On the home page, when we click the intermediate button, we will jump to one,

How is it implemented in the code? Let's look at it:

mHandleView = (HandleView) findViewById(R.id.all_apps_button);        mHandleView.setLauncher(this);        mHandleView.setOnClickListener(this);        mHandleView.setOnLongClickListener(this);

Let's look at the onclick () method: In The onclick method, there is a code

else if (v == mHandleView) {            if (isAllAppsVisible()) {                closeAllApps(true);            } else {                showAllApps(true);            }

Let's look at the showallapps () method.

void showAllApps(boolean animated) {        mAllAppsGrid.zoom(1.0f, animated);        ((View) mAllAppsGrid).setFocusable(true);        ((View) mAllAppsGrid).requestFocus();                // TODO: fade these two too        mDeleteZone.setVisibility(View.GONE);        mHandleView.setVisibility(View.GONE);        mPreviousView.setVisibility(View.GONE);        mNextView.setVisibility(View.GONE);hotseatLeft.setVisibility(View.GONE);hotseatRight.setVisibility(View.GONE);    }

Mall1_grid is used above. Let's look for this control:

    private AllAppsView mAllAppsGrid;        mAllAppsGrid = (AllAppsView)dragLayer.findViewById(R.id.all_apps_view);        mAllAppsGrid.setLauncher(this);        mAllAppsGrid.setDragController(dragController);        ((View) mAllAppsGrid).setWillNotDraw(false); // We don't want a hole punched in our window.        // Manage focusability manually since this thing is always visible        ((View) mAllAppsGrid).setFocusable(false);

The above code is defined in the setupview () method in launcher. java.
All_apps_view is defined in all_app_2d.xml.

In allapp2d. Java, you can find the methods used by mallappsgrid, such as addapps, removeapps, and zoom:

public void addApps(ArrayList<ApplicationInfo> list) {//        Log.d(TAG, "addApps: " + list.size() + " apps: " + list.toString());        final int N = list.size();        for (int i=0; i<N; i++) {            final ApplicationInfo item = list.get(i);            int index = Collections.binarySearch(mAllAppsList, item,                    LauncherModel.APP_NAME_COMPARATOR);            if (index < 0) {                index = -(index+1);            }            mAllAppsList.add(index, item);        }        mAppsAdapter.notifyDataSetChanged();    }    public void removeApps(ArrayList<ApplicationInfo> list) {        final int N = list.size();        for (int i=0; i<N; i++) {            final ApplicationInfo item = list.get(i);            int index = findAppByComponent(mAllAppsList, item);            if (index >= 0) {                mAllAppsList.remove(index);            } else {                Log.w(TAG, "couldn't find a match for item \"" + item + "\"");                // Try to recover.  This should keep us from crashing for now.            }        }        mAppsAdapter.notifyDataSetChanged();    }     public void zoom(float zoom, boolean animate) {//        Log.d(TAG, "zooming " + ((zoom == 1.0) ? "open" : "closed"));        cancelLongPress();        mZoom = zoom;        if (isVisible()) {            getParent().bringChildToFront(this);            setVisibility(View.VISIBLE);            mGrid.setAdapter(mAppsAdapter);            if (animate) {                startAnimation(AnimationUtils.loadAnimation(getContext(), R.anim.all_apps_2d_fade_in));            } else {                onAnimationEnd();            }        } else {            if (animate) {                startAnimation(AnimationUtils.loadAnimation(getContext(), R.anim.all_apps_2d_fade_out));            } else {                onAnimationEnd();            }        }    }

The zoom () method contains mgrid. setadapter (mappsadapter). In the constructor, assign a value to the adapter.

public AllApps2D(Context context, AttributeSet attrs) {        super(context, attrs);        setVisibility(View.GONE);        setSoundEffectsEnabled(false);        mAppsAdapter = new AppsAdapter(getContext(), mAllAppsList);        mAppsAdapter.setNotifyOnChange(false);    }

How does one obtain the Application List? Let's go back to launcher. Java, in loadhotseats:

 private void loadHotseats() {        if (mHotseatConfig == null) {            mHotseatConfig = getResources().getStringArray(R.array.hotseats);            if (mHotseatConfig.length > 0) {                mHotseats = new Intent[mHotseatConfig.length];                mHotseatLabels = new CharSequence[mHotseatConfig.length];                mHotseatIcons = new Drawable[mHotseatConfig.length];            } else {                mHotseats = null;                mHotseatIcons = null;                mHotseatLabels = null;            }            TypedArray hotseatIconDrawables = getResources().obtainTypedArray(R.array.hotseat_icons);            for (int i=0; i<mHotseatConfig.length; i++) {                // load icon for this slot; currently unrelated to the actual activity                try {                    mHotseatIcons[i] = hotseatIconDrawables.getDrawable(i);                } catch (ArrayIndexOutOfBoundsException ex) {                    Log.w(TAG, "Missing hotseat_icons array item #" + i);                    mHotseatIcons[i] = null;                }            }            hotseatIconDrawables.recycle();        }        PackageManager pm = getPackageManager();        for (int i=0; i<mHotseatConfig.length; i++) {            Intent intent = null;            if (mHotseatConfig[i].equals("*BROWSER*")) {                // magic value meaning "launch user's default web browser"                // replace it with a generic web request so we can see if there is indeed a default                String defaultUri = getString(R.string.default_browser_url);                intent = new Intent(                        Intent.ACTION_VIEW,                        ((defaultUri != null)                            ? Uri.parse(defaultUri)                            : getDefaultBrowserUri())                    ).addCategory(Intent.CATEGORY_BROWSABLE);                // note: if the user launches this without a default set, she                // will always be taken to the default URL above; this is                // unavoidable as we must specify a valid URL in order for the                // chooser to appear, and once the user selects something, that                 // URL is unavoidably sent to the chosen app.            } else {                try {                    intent = Intent.parseUri(mHotseatConfig[i], 0);                } catch (java.net.URISyntaxException ex) {                    Log.w(TAG, "Invalid hotseat intent: " + mHotseatConfig[i]);                    // bogus; leave intent=null                }            }                        if (intent == null) {                mHotseats[i] = null;                mHotseatLabels[i] = getText(R.string.activity_not_found);                continue;            }            if (LOGD) {                Log.d(TAG, "loadHotseats: hotseat " + i                     + " initial intent=["                     + intent.toUri(Intent.URI_INTENT_SCHEME)                    + "]");            }            ResolveInfo bestMatch = pm.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);            List<ResolveInfo> allMatches = pm.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);            if (LOGD) {                 Log.d(TAG, "Best match for intent: " + bestMatch);                Log.d(TAG, "All matches: ");                for (ResolveInfo ri : allMatches) {                    Log.d(TAG, "  --> " + ri);                }            }            // did this resolve to a single app, or the resolver?            if (allMatches.size() == 0 || bestMatch == null) {                // can't find any activity to handle this. let's leave the                 // intent as-is and let Launcher show a toast when it fails                 // to launch.                mHotseats[i] = intent;                // set accessibility text to "Not installed"                mHotseatLabels[i] = getText(R.string.activity_not_found);            } else {                boolean found = false;                for (ResolveInfo ri : allMatches) {                    if (bestMatch.activityInfo.name.equals(ri.activityInfo.name)                        && bestMatch.activityInfo.applicationInfo.packageName                            .equals(ri.activityInfo.applicationInfo.packageName)) {                        found = true;                        break;                    }                }                                if (!found) {                    if (LOGD) Log.d(TAG, "Multiple options, no default yet");                    // the bestMatch is probably the ResolveActivity, meaning the                    // user has not yet selected a default                    // so: we'll keep the original intent for now                    mHotseats[i] = intent;                    // set the accessibility text to "Select shortcut"                    mHotseatLabels[i] = getText(R.string.title_select_shortcut);                } else {                    // we have an app!                    // now reconstruct the intent to launch it through the front                    // door                    ComponentName com = new ComponentName(                        bestMatch.activityInfo.applicationInfo.packageName,                        bestMatch.activityInfo.name);                    mHotseats[i] = new Intent(Intent.ACTION_MAIN).setComponent(com);                    // load the app label for accessibility                    mHotseatLabels[i] = bestMatch.activityInfo.loadLabel(pm);                }            }            if (LOGD) {                Log.d(TAG, "loadHotseats: hotseat " + i                     + " final intent=["                     + ((mHotseats[i] == null)                        ? "null"                        : mHotseats[i].toUri(Intent.URI_INTENT_SCHEME))                    + "] label=[" + mHotseatLabels[i]                    + "]"                    );            }        }    }

The main code is as follows:

 PackageManager pm = getPackageManager();ResolveInfo bestMatch = pm.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);List<ResolveInfo> allMatches = pm.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);

This will be obtained. The following is a simple example to get the list of programs installed on the SD card:

private void getSdcardApps(){mSdcardAppsList.clear();ActivityManager am = (ActivityManager)mLauncher.getSystemService(Activity.ACTIVITY_SERVICE);PackageManager pm =mLauncher.getPackageManager();  List<android.content.pm.ApplicationInfo> list = pm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES);for (android.content.pm.ApplicationInfo appInfo : list) {if((appInfo.flags & android.content.pm.ApplicationInfo.FLAG_EXTERNAL_STORAGE) != 0){for (ApplicationInfo applicationInfo : mAllAppsList) {if(appInfo.packageName.equals(applicationInfo.componentName.getPackageName())){mSdcardAppsList.add(applicationInfo);break;}}}}mAppsAdapter = new AppsAdapter(getContext(), mSdcardAppsList);mAppsAdapter.notifyDataSetChanged();mGrid.setAdapter(mAppsAdapter);text.setVisibility(View.VISIBLE);text.setBackgroundResource(R.drawable.tab_mmenu_b3_normal);}