Android鎖定EditText內容和隨機生成驗證碼

4e48 9年前發布 | 53K 次閱讀 Android Android開發移動開發

昨天寫了個小Demo，實現了隨機生成驗證碼，和鎖定EditText兩個小功能，先看一下效果圖：

鎖定EditText在我們不需要用戶編輯EditText內容的時候可以用到，實現還是很簡單的，一行代碼：

etLock.setEnabled(false);

隨機生成驗證碼，主要是用了Random函數，以及將View轉為Bitmap的邏輯，也沒有難點，下面貼一下代碼，供需要的朋友參考：

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("解鎖");
            } else {
                etLock.setEnabled(true);
                btnLock.setText("鎖定");
            }
        } 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("輸入正確");
                    tvCheck.setTextColor(Color.GREEN);
                } else {
                    tvCheck.setText("輸入錯誤");
                    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);
}

}</pre>

布局文件： main.xml 






<LinearLayout xmlns:android="

<TextView
    android:layout_width="wrap_content"
    android:text="鎖定EditText內容："
    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="鎖定" />
</LinearLayout>

<TextView
    android:layout_marginTop="50dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="隨機生成4位驗證碼：" />

<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="驗證碼"
        android:layout_width="80dp"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/tvCheck"
        android:text="結果"
        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="確定" />

</LinearLayout></pre>

有疑問歡迎交流~ 



還是上傳一下代碼吧，是用Android Studio寫的。鏈接：代碼下載 




轉載請注明出處：周木水的CSDN博客 http://blog.csdn.net/zhoumushui 

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

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Android Android開發移動開發

Android鎖定EditText內容和隨機生成驗證碼

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