Android锁定EditText内容和随机生成验证码

昨天写了个小Demo，实现了随机生成验证码，和锁定EditText两个小功能，先看一下效果图：

锁定EditText在我们不需要用户编辑EditText内容的时候可以用到，实现还是很简单的，一行代码：

etLock.setEnabled(false);

随机生成验证码，主要是用了Random函数，以及将View转为Bitmap的逻辑，也没有难点，下面贴一下代码，供需要的朋友参考：

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 android.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 ivNumA;      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.setOnClickListener(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("解锁");                  } else {                      etLock.setEnabled(true);                      btnLock.setText("锁定");                  }              } 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("输入正确");                          tvCheck.setTextColor(Color.GREEN);                      } else {                          tvCheck.setText("输入错误");                          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:看不清楚            int randomColorId = new Random().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);      }  }

布局文件： 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/activity_horizontal_margin"      android:paddingRight="@dimen/activity_horizontal_margin"      android:paddingTop="@dimen/activity_vertical_margin"      android:paddingBottom="@dimen/activity_vertical_margin"      android:orientation="vertical"      tools:context=".Main">        <TextView          android:layout_width="wrap_content"          android:text="锁定EditText内容："          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="锁定" />      </LinearLayout>        <TextView          android:layout_marginTop="50dp"          android:layout_width="wrap_content"          android:layout_height="wrap_content"          android:text="随机生成4位验证码：" />        <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>        <LinearLayout          android:layout_width="fill_parent"          android:layout_height="wrap_content"          android:orientation="horizontal">            <EditText              android:id="@+id/etCheck"              android:hint="验证码"              android:layout_width="80dp"              android:layout_height="wrap_content" />            <TextView              android:id="@+id/tvCheck"              android:text="结果"              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="确定" />  </LinearLayout>

有疑问欢迎交流~

还是上传一下代码吧，是用Android Studio写的。链接：代码下载

转载请注明出处：周木水的CSDN博客 http://blog.csdn.net/zhoumushui

我的GitHub：周木水的GitHub https://github.com/zhoumushui