Android Display empty Page tool class

Do the project will certainly encounter such a requirement, the data load is empty or the data load exception when displaying an empty page to the user:

This blog is to implement such a simple package

1. First define a linear layout
2. Then use a tool class to manage such a view

First look at the custom linear layout

 Public  class emptylayout extends linearlayout{    /** * Empty page picture * *    PrivateImageView emptyimg;/** * Empty page text * /    PrivateTextView Emptytv;/** * Empty text * *    PrivateString Emptytext;/** * Empty text color * /    Private intEmptytextcolor;/** * Empty Text Size * /    Private floatEmptytextsize;/** * Empty picture * *    PrivateDrawable emptydrawable;/** * Picture width * /    Private intImgWidth;/** * Picture Height * /    Private intImgHeight; Public Emptylayout(Context context) { This(Context,NULL); } Public Emptylayout(context context, AttributeSet attrs) { This(Context, Attrs,0); } Public Emptylayout(context context, AttributeSet attrs,intDEFSTYLEATTR) {Super(Context, attrs, defstyleattr);//Initialize layoutInitview ();//Initialization ParametersInitdatas (); }/** * Initializing layouts * /    Private void Initview() {View view= layoutinflater.from (GetContext ()). Inflate (R.layout.empty_layout, This);//Note the parent incoming linearlayout of the inflate methodEmptyimg= (ImageView) View.findviewbyid (R.ID.COMMON_IV);    emptytv= (TextView) View.findviewbyid (R.ID.COMMON_TV); }/** * Set text * *     Public void Setemptytext(String Emptytext) { This. Emptytext=emptytext;if(emptytext!=NULL) Emptytv.settext (Emptytext); }/** * Set Text color * /     Public void Setemptytextcolor(intEmptytextcolor) { This. Emptytextcolor=emptytextcolor;    Emptytv.settextcolor (Emptytextcolor); }/** * Set empty text font size * * @param emptytextsize Unit is SP */     Public void setemptytextsize(floatEmptytextsize) { This. emptytextsize=emptytextsize;    Emptytv.settextsize (typedvalue.complex_unit_px,emptytextsize); }/** * Setting picture * /    @TargetApi(Build.version_codes. Jelly_bean) Public void setemptydrawable(drawable drawable) { This. emptydrawable=drawable;    Emptyimg.setbackground (drawable); }/** * Set the width and height of the picture */     Public void Setimgwh(intImgWidth,intImgHeight) { This. imgheight=imgheight; This. imgwidth=imgwidth;        Viewgroup.layoutparams Lp=emptyimg.getlayoutparams ();        Lp.width=imgwidth;        Lp.height=imgheight;    EMPTYIMG.SETLAYOUTPARAMS (LP); }/** * Initialization parameters * /     Public void Initdatas() {setemptytext (emptytext);        Setemptytextcolor (Emptytextcolor);        Setemptytextsize (emptytextsize);        Setemptydrawable (emptydrawable);    Setimgwh (Imgwidth,imgheight); }}

The code is very simple, simple I do not know what to say, the comments are more clear.

The layout is then initialized with a tool class:

public class Viewutil {public static emptylayout Getemptylayout (context context, String text) {emptylayout Layo Ut=new emptylayout (context);Layout. Setemptytext(text);Layout. Setemptytextsize(commonutils. Dip2PX (Context, the));Layout. Setemptytextcolor(Context. Getresources(). GetColor(R. Color. Coloraccent));Layout. Setemptydrawable(Context. Getresources(). Getdrawable(R. Mipmap. NoData));Layout. Setimgwh(commonutils. Dip2PX (Context, the), Commonutils. Dip2PX (Context, -));It controls the Abslistview.. Layoutparamsparams = new Abslistview. Layoutparams(Abslistview. Layoutparams. MATCH_parent, Commonutils. Dip2PX (Context, -));Layout. Setlayoutparams(params);return layout;}}

There is no difficulty in using a DP-to-PX approach, which is common:

/**     * dp转px     */    publicstaticintdip2px(Context context ,float dpValue){        float density=context.getResources().getDisplayMetrics().density;        return (int)(dpValue*density+0.5);    }

Finally see how to use:

publicclass MainActivity extends AppCompatActivity {    @Override    protectedvoidonCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(ViewUtil.getEmptyLayout(this,"暂无数据"));    }}

Just call where you want to use the view.

ViewUtil.getEmptyLayout(this,"暂无数据")

The same can be similar to the implementation of the Web-free condition of the page, page loading failed pages and so on. Instead of having to write the layout file in the layout of the corresponding page.

PS: In the end, put a way to the login or not package

/** * Prompt login * @param context * @param clazz */     Public  Static void isenterloginact(FinalContext Context,class clazz) {//Get login user to save data        BooleanIslogin=textutils.isempty (Globalparams.token)if(IsLogin) {Intent Intent =NewIntent (context, clazz);        Context.startactivity (Intent); }Else{Showdialogutils.showinfodialog (context,"You are not logged in, are you going to log in?" ",NewView.onclicklistener () {@Override                 Public void OnClick(View v) {Intent Intent =NewIntent (context, loginact.class);                Context.startactivity (Intent);        }            }); }    }

has been the package is not very good, do not accumulate silicon step without even thousands of miles, first from the simplest to start.

Android Display empty Page tool class