Add ProgressBar and ViewGroup through viewgroup of Activity

Add ProgressBar and ViewGroup through viewgroup of Activity

ProgressBar is a common component. we can implement a progressBar in multiple ways. One way is to place a bar through an Activity window, as we all know in android that the link is Activity-> Window-> View [ViewGroup], we can load a progressBar through the window of the current Activity, when we use this Activity as a base class, then its subclass and the Fragment attached above can easily display a progressbar. [We can make a single example of this custom progressbar.]

The specific implementation process is as follows:

1: progressbar layout to be displayed

A linearLayout contains a TextView to be prompted and a progress bar.

<?xml version="1.0" encoding="UTF-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:background="#00000000"    android:gravity="center" >    <LinearLayout        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:background="@color/sdk_semitransparent"        android:gravity="center"        android:padding="15dp" >        <ProgressBar            style="@style/sdk_load_progress_style"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:indeterminateDrawable="@drawable/sdk_load_progressbar" />        <TextView            android:id="@+id/progress_txt"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_marginLeft="5dp"            android:text="@string/sdk_loading" >        </TextView>    </LinearLayout></LinearLayout>

2: Implement custom progressbar

The annotations in the Window are clear, that is, a Window is obtained through the Activity, and a layout that we need to display is added.

Public class ProgressView {// progressbar layout private View mDialogView; // ViewGroup [mFLayout] private ViewGroup mFragmentView obtained from the current Activity; // create a layout, place Our progressbar to set some actual properties private LinearLayout mFLayout; // The singleton object private static ProgressView mInstance; // The text View private TextView mProgressText to be prompted; // set whether to cancel private boolean mCancelable = true; private ProgressView () {} public static synchronized ProgressView getInstance () {if (mInstance = null) {mInstance = new ProgressView ();} return mInstance;} public void showProgressView (Activity act, int loadingTextId, boolean cancelable) {showProgressView (act, ResUtil. getString (loadingTextId), cancelable);} public void showProgressView (Activity act, int loadingTextId) {showProgressView (act, ResUtil. getString (loadingTextId), true);} public void showProgressView (Activity act, String tipStr) {showProgressView (act, tipStr, true);} public void showDilaogProgressView (Activity act, String tipStr) {dialogProgressView (act, tipStr, true );} /***** <one-sentence function description> <br> * <function description> ** @ param act content * @ param loading_text progress: String */public void showProgressView (Activity act, string loading_text, boolean cancelable) {mDialogView = act. getLayoutInflater (). inflate (R. layout. sdk_dialog_progress, null); mProgressText = (TextView) mDialogView. findViewById (R. id. progress_txt );

// This layout_base is the layout of mFragmentView = (ViewGroup) act to be displayed in the Activity. getWindow (). findViewById (R. id. layout_base); mCancelable = cancelable; mFLayout = new LinearLayout (act); if (! TextUtils. isEmpty (loading_text) {mProgressText. setText (loading_text) ;}init ();} /***** <one-sentence function description> <br> * <function description> ** @ param act content * @ param loading_text progress: String */public void dialogProgressView (Activity act, string loading_text, boolean cancelable) {mDialogView = act. getLayoutInflater (). inflate (R. layout. sdk_dialog_progress, null); mProgressText = (TextView) mDialogView. findVie WById (R. id. progress_txt); mFragmentView = (ViewGroup) act. getWindow (). findViewById (R. id. skd2_base_content); mCancelable = cancelable; mFLayout = new LinearLayout (act); if (! TextUtils. isEmpty (loading_text) {mProgressText. setText (loading_text);} init ();} private void init () {RelativeLayout. layoutParams params = new RelativeLayout. layoutParams (LinearLayout. layoutParams. MATCH_PARENT, LinearLayout. layoutParams. MATCH_PARENT); params. addRule (RelativeLayout. CENTER_IN_PARENT); mFLayout. setLayoutParams (params); mFLayout. setBackgroundColor (ResUtil. getColor (R. color. sdk_tran Sparent); LinearLayout. layoutParams layoutParams = new LinearLayout. layoutParams (LinearLayout. layoutParams. MATCH_PARENT, LinearLayout. layoutParams. WRAP_CONTENT); layoutParams. gravity = Gravity. CENTER; layoutParams. setMargins (20, 0, 20, 0); mFLayout. addView (mDialogView, layoutParams); addDialogContentView ();} private void addDialogContentView () {if (mFragmentView! = Null) {mFragmentView. addView (mFLayout, new LinearLayout. layoutParams (LinearLayout. layoutParams. MATCH_PARENT, LinearLayout. layoutParams. MATCH_PARENT);} mFLayout. setOnClickListener (new OnClickListener () {@ Override public void onClick (View v) {// when the progress pop-up intercepts the page Click Event});} public void dismissProgress () {if (mFragmentView! = Null & mFLayout! = Null) {mFragmentView. removeView (mFLayout);} reset ();} public boolean onKeyDown (int keyCode, KeyEvent event) {if (! MCancelable) {reset (); return true;} if (keyCode = KeyEvent. KEYCODE_BACK) {// Monitor/intercept/shield the return key if (mFragmentView = null | mDialogView = null | mFLayout = null) {return true;} dismissProgress (); return false;} return true;} private void reset () {mDialogView = null; mFragmentView = null; mFLayout = null ;}}

3: Usage

// Display ProgressView. getInstance (). showProgressView (avtivityA, ""); // cancel ProgressView. getInstance (). dismissProgress ();