Android locks EditText content and randomly generated verification code, androidedittext

Android locks EditText content and randomly generated verification code, androidedittext

I wrote a small Demo yesterday to implement the Random verification code generation and EditText locking functions. Let's take a look at it first:

Locking EditText can be used when users do not need to edit EditText content. The implementation is still very simple, with a line of code:

etLock.setEnabled(false);

The Random verification code is generated mainly by using the Random function and converting the View into the Bitmap logic. There is no difficulty. I will paste the code below for your reference:

Main. java

Package com. zms. textlock; import android. graphics. bitmap; import android. graphics. canvas; import android. graphics. color; import android. graphics. matrix; import android. support. v7.app. actionBarActivity; import android. OS. bundle; import android. view. menu; import android. view. menuItem; import android. view. view; import android. widget. button; import android. widget. editText; import android. widget. imageView; import Droid. widget. textView; import java. util. random; public class Main extends ActionBarActivity {private Button btnLock; private EditText etLock; private String numStrTmp = ""; private String numStr = ""; private int [] numArray = new int [4]; private int [] colorArray = new int [6]; private TextView tvHideA; private TextView tvHideB; private TextView tvHideC; private TextView tvHideD; private ImageView iv NumA; private ImageView ivNumB; private ImageView ivNumC; private ImageView ivNumD; private Button btnCheck; private TextView tvCheck; private EditText etCheck; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. main); btnLock = (Button) findViewById (R. id. btnLock); etLock = (EditText) findViewById (R. id. etLock); btnLock. setOnCl IckListener (new onClickListenerImp (); tvHideA = (TextView) findViewById (R. id. tvHideA); tvHideB = (TextView) findViewById (R. id. tvHideB); tvHideC = (TextView) findViewById (R. id. tvHideC); tvHideD = (TextView) findViewById (R. id. tvHideD); ivNumA = (ImageView) findViewById (R. id. ivNumA); ivNumB = (ImageView) findViewById (R. id. ivNumB); ivNumC = (ImageView) findViewById (R. id. ivNumC); ivNumD = (ImageView) FindViewById (R. id. ivNumD); tvCheck = (TextView) findViewById (R. id. tvCheck); etCheck = (EditText) findViewById (R. id. etCheck); btnCheck = (Button) findViewById (R. id. btnCheck); btnCheck. setOnClickListener (new onClickListenerImp (); setNum ();} private class onClickListenerImp implements View. onClickListener {@ Override public void onClick (View view) {if (view = btnLock) {if (etLock. isEnabled ()){ EtLock. setEnabled (false); btnLock. setText ("unlock");} else {etLock. setEnabled (true); btnLock. setText ("locked") ;}} else if (view = btnCheck) {if (etCheck. getText (). toString ()! = Null & etCheck. getText (). toString (). trim (). length ()> 0) {tvCheck. setVisibility (View. VISIBLE); if (numStr. equals (etCheck. getText (). toString () {tvCheck. setText ("correct input"); tvCheck. setTextColor (Color. GREEN);} else {tvCheck. setText ("input error"); tvCheck. setTextColor (Color. RED) ;}} else {setNum (); tvCheck. setVisibility (View. GONE); // Toast. makeText (Main. this, "Please Input Verify Code", Toast. LENGTH_SHORT ). show () ;}}} public void initNum () {numStr = ""; numStrTmp = ""; for (int I = 0; I <numArray. length; I ++) {int numIntTmp = new Random (). nextInt (10); numStrTmp = String. valueOf (numIntTmp); numStr = numStr + numStrTmp; numArray [I] = numIntTmp;} public void setNum () {initNum (); tvHideA. setText ("" + numArray [0]); tvHideA. setTextColor (randomColor (); tvHideB. setText ("" + numArray [1]); tvHideB. setTextColor (randomColor (); tvHideC. setText ("" + numArray [2]); tvHideC. setTextColor (randomColor (); tvHideD. setText ("" + numArray [3]); tvHideD. setTextColor (randomColor (); // Num 1 Matrix matrixA = new Matrix (); matrixA. reset (); matrixA. setRotate (randomAngle (); Bitmap bmNumA = Bitmap. createBitmap (getBitmapFromView (tvHideA, 20, 50), 0, 0, 20, 50, matrixA, true); ivNumA. setImageBitmap (bmNumA); // Num 2 Matrix matrixB = new Matrix (); matrixB. reset (); matrixB. setRotate (randomAngle (); Bitmap bmNumB = Bitmap. createBitmap (getBitmapFromView (tvHideB, 20, 50), 0, 0, 20, 50, matrixB, true); ivNumB. setImageBitmap (bmNumB); // Num 3 Matrix matrixC = new Matrix (); matrixC. reset (); matrixC. setRotate (randomAngle (); Bitmap bmNumC = Bitmap. createBitmap (getBitmapFromView (tvHideC, 20, 50), 0, 0, 20, 50, matrixC, true); ivNumC. setImageBitmap (bmNumC); // Num 4 Matrix matrixD = new Matrix (); matrixD. reset (); matrixD. setRotate (randomAngle (); Bitmap bmNumD = Bitmap. createBitmap (getBitmapFromView (tvHideD, 20, 50), 0, 0, 20, 50, matrixD, true); ivNumD. setImageBitmap (bmNumD);} public int randomAngle () {return 20 * (new Random (). nextInt (5)-new Random (). nextInt (3);} public int randomColor () {colorArray [0] = 0xFF000000; // BLACK colorArray [1] = 0xFFFF00FF; // MAGENTA colorArray [2] = 0xFFFF0000; // RED colorArray [3] = 0xFF00FF00; // GREEN colorArray [4] = 0xFF0000FF; // BLUE colorArray [5] = 0xFF00FFFF; // CYAN // colorArray [6] = 0xFFFFFF00; // YELLOW: the int randomColorId = new Random () is not clear (). nextInt (6); return colorArray [randomColorId];} public static Bitmap getBitmapFromView (View view, int width, int height) {int widthSpec = View. measureSpec. makeMeasureSpec (width, View. measureSpec. EXACTLY); int heightSpec = View. measureSpec. makeMeasureSpec (height, View. measureSpec. EXACTLY); view. measure (widthSpec, heightSpec); view. layout (0, 0, width, height); Bitmap bitmap = Bitmap. createBitmap (width, height, Bitmap. config. ARGB_8888); Canvas canvas = new Canvas (bitmap); view. draw (canvas); return bitmap;} @ Override public boolean onCreateOptionsMenu (Menu menu) {// Inflate the menu; this adds items to the action bar if it is present. getMenuInflater (). inflate (R. menu. main, menu); return true ;}@ Override public boolean onOptionsItemSelected (MenuItem item) {// Handle action bar item clicks here. the action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest. xml. int id = item. getItemId (); // noinspection SimplifiableIfStatement if (id = R. id. action_settings) {return true;} return super. onOptionsItemSelected (item );}}

Layout file: main. xml

<LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" xmlns: tools = "http://schemas.android.com/tools" android: layout_width = "match_parent" android: layout_height = "match_parent" android: paddingLeft = "@ dimen/plugin" android: paddingRight = "@ dimen/plugin" android: paddingTop = "@ dimen/activity_vertical_margin" android: paddingBottom = "@ dimen/plugin" android: orientation = "vertical" tools: context = ". main "> <TextView android: layout_width =" wrap_content "android: text =" lock EditText content: "android: layout_height =" wrap_content "/> <LinearLayout android: layout_width = "fill_parent" android: layout_height = "wrap_content" android: orientation = "horizontal"> <EditText android: id = "@ + id/etLock" android: layout_width = "200dp" android: layout_height = "wrap_content"/> <Button android: id = "@ + id/btnLock" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: text = "locked"/> </LinearLayout> <TextView android: layout_marginTop = "50dp" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: text = "randomly generated 4-digit Verification Code:"/> <LinearLayout android: layout_width = "fill_parent" android: layout_height = "wrap_content" android: orientation = "horizontal"> <LinearLayout android: id = "@ + id/layVerify" android: orientation = "horizontal" android: layout_width = "wrap_content" android: layout_height = "wrap_content"> <TextView android: id = "@ + id/tvHideA" android: layout_width = "70dp" android: layout_height = "70dp" android: textSize = "30dp" android: gravity = "center" android: visibility = "gone"/> <TextView android: id = "@ + id/tvHideB" android: layout_width = "70dp" android: layout_height = "70dp" android: textSize = "30dp" android: gravity = "center" android: visibility = "gone"/> <TextView android: id = "@ + id/tvHideC" android: layout_width = "70dp" android: layout_height = "70dp" android: textSize = "30dp" android: gravity = "center" android: visibility = "gone"/> <TextView android: id = "@ + id/tvHideD" android: layout_width = "70dp" android: layout_height = "70dp" android: textSize = "30dp" android: gravity = "center" android: visibility = "gone"/> </LinearLayout> <LinearLayout android: layout_width = "wrap_content" android: orientation = "horizontal" android: layout_height = "wrap_content"> <ImageView android: id = "@ + id/ivNumA" android: layout_width = "50dp" android: layout_height = "70dp"/> <ImageView android: id = "@ + id/ivNumB" android: layout_width = "50dp" android: layout_height = "70dp"/> <ImageView android: id = "@ + id/ivNumC" android: layout_width = "50dp" android: layout_height = "70dp"/> <ImageView android: id = "@ + id/ivNumD" android: layout_width = "50dp" android: layout_height = "70dp"/> </LinearLayout> <LinearLayout android: layout_width = "fill_parent" android: layout_height = "wrap_content" android: orientation = "horizontal"> <EditText android: id = "@ + id/etCheck" android: hint = "Verification Code" android: layout_width = "80dp" android: layout_height = "wrap_content"/> <TextView android: id = "@ + id/tvCheck" android: text = "result" android: visibility = "gone" android: layout_width = "wrap_content" android: layout_height = "wrap_content"/> </LinearLayout> <Button android: id = "@ + id/btnCheck" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: text = "OK"/> </LinearLayout>

If you have any questions, please contact us ~

Upload the code using Android Studio. Link: Code download

Reprinted please indicate the source: Zhou mu Shui CSDN blog http://blog.csdn.net/zhoumushui

My GitHub: Zhou mu Shui's GitHub https://github.com/zhoumushui