Android Development Note ___ Image View __ Simple screenshot

1 <?XML version= "1.0" encoding= "Utf-8"?>2 <LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"3 Android:layout_width= "Match_parent"4 Android:layout_height= "Match_parent"5 android:orientation= "vertical">6 7     <LinearLayout8         Android:layout_width= "Match_parent"9 Android:layout_height= "300DP"Ten Android:layout_margintop= "10DP" One android:orientation= "Horizontal"> A  -         <TextView -             Android:id= "@+id/tv_capture" the Android:layout_width= "0DP" - Android:layout_height= "Match_parent" - Android:layout_weight= "1" - Android:background= "#ffffff" + Android:textcolor= "#000000" - Android:scrollbars= "vertical" + android:textsize= "17SP" /> A  at         <ImageView -             Android:id= "@+id/iv_capture" - Android:layout_width= "0DP" - Android:layout_height= "Match_parent" - Android:layout_weight= "1" /> -  in     </LinearLayout> -  to     <LinearLayout +         Android:layout_width= "Match_parent" - Android:layout_height= "Wrap_content" the Android:layout_margintop= "10DP" * android:orientation= "Horizontal"> $ Panax Notoginseng         <Button -             Android:id= "@+id/btn_chat" the Android:layout_width= "0DP" + Android:layout_height= "Wrap_content" A Android:layout_weight= "1" the Android:text= "Chat" + Android:textcolor= "#000000" - android:textsize= "17SP" /> $  $         <Button -             Android:id= "@+id/btn_capture" - Android:layout_width= "0DP" the Android:layout_height= "Wrap_content" - Android:layout_weight= "1"Wuyi Android:text="" the Android:textcolor= "#000000" - android:textsize= "17SP" /> Wu  -     </LinearLayout> About  $ </LinearLayout>

Java

1  PackageCom.example.alimjan.hello_world;2 3 /**4 * Created by Alimjan on 7/1/2017.5  */6 7 8 ImportAndroid.content.Context;9 Importandroid.content.Intent;Ten ImportAndroid.graphics.Bitmap; One         ImportAndroid.os.Bundle; A         ImportAndroid.os.Handler; -         Importandroid.support.v7.app.AppCompatActivity; - ImportAndroid.text.method.ScrollingMovementMethod; the Importandroid.view.Gravity; - ImportAndroid.view.View; -         ImportAndroid.widget.Button; -         ImportAndroid.widget.ImageView; +         ImportAndroid.widget.TextView; -  +  Public classClass__2_3_3_2extendsAppcompatactivityImplementsView.onclicklistener, View.onlongclicklistener { A     PrivateTextView tv_capture; at     PrivateImageView iv_capture; -  - @Override -     protected voidonCreate (Bundle savedinstancestate) { -         Super. OnCreate (savedinstancestate); - Setcontentview (r.layout.code_2_3_3_2); inTv_capture =(TextView) Findviewbyid (r.id.tv_capture); -Iv_capture =(ImageView) Findviewbyid (r.id.iv_capture); toTv_capture.setdrawingcacheenabled (true); +Tv_capture.setgravity (gravity.left|gravity.bottom); -Tv_capture.setlines (17); theTv_capture.setmaxlines (17); *Tv_capture.setmovementmethod (NewScrollingmovementmethod ()); $Button Btn_chat =(Button) Findviewbyid (r.id.btn_chat);Panax NotoginsengButton btn_capture =(Button) Findviewbyid (r.id.btn_capture); -Btn_chat.setonclicklistener ( This); theBtn_chat.setonlongclicklistener ( This); +Btn_capture.setonclicklistener ( This); A     } the  +     PrivateString[] Mchatstr = {"Have you eaten yet?" "It's a nice day today." ", -"I won the lottery!" "Let's go see a movie." "What do you do in the evening?" " }; $  $ @Override -      Public BooleanOnlongclick (View v) { -         if(V.getid () = =r.id.btn_chat) { theTv_capture.settext (""); -         }Wuyi         return true; the     } - @Override Wu      Public voidOnClick (View v) { -         if(V.getid () = =r.id.btn_chat) { About             intRandom = (int) (Math.random () *10)% 5; $String newstr = String.Format ("%s\n%s%s", - Tv_capture.gettext (). toString (), Dateutil.getcurdatestr (), Mchatstr[random]); - Tv_capture.settext (NEWSTR); -}Else if(V.getid () = =r.id.btn_capture) { ABitmap Bitmap =Tv_capture.getdrawingcache (); + Iv_capture.setimagebitmap (bitmap); the             //Note that it is not possible to close the drawing cache immediately after completion because the rendering takes time, -             //If you close the cache immediately, the render screen will not find the bitmap object, will be error $             //"Java.lang.IllegalArgumentException:Cannot Draw recycled bitmaps".  theMhandler.postdelayed (Mresetcache, 200); the         } the     } the  -     PrivateHandler Mhandler =NewHandler (); in     PrivateRunnable Mresetcache =NewRunnable () { the @Override the          Public voidrun () { AboutTv_capture.setdrawingcacheenabled (false); theTv_capture.setdrawingcacheenabled (true); the         } the     }; +  -      Public Static voidstarthome (Context mcontext) { theIntent Intent =NewIntent (Mcontext, Class__2_3_3_2.class);Bayi mcontext.startactivity (intent); the     } the}

Android Development Note ___ Image View __ Simple screenshot