android 密码强度校验

要求：

• 英文大写字符（A~Z）
• 英文小写字符（a~z）
• 数字（0~9）
• 除了英文句号特殊符号“.”，其他的不能使用

效果图：

 MainActivity代码：

public class Test05Activity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test05);
        initView();
    }

    private void initView(){
        EditText passwordEdit = findViewById(R.id.passwordEdit);
        Button btnClean = findViewById(R.id.btnClean);
        LinearLayout passLayout = findViewById(R.id.passwordLayout);
        View passView1 = findViewById(R.id.passwordView1);
        View passView2 = findViewById(R.id.passwordView2);
        btnClean.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                passwordEdit.setText(null);
            }
        });
        passwordEdit.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
                if(s.toString().length() > 0){
                    if(s.toString().length() == 1)
                        passLayout.setVisibility(View.VISIBLE);
                    switch (checkPassWord(s.toString())){
                        case 1:
                            passView1.setVisibility(View.GONE);
                            passView2.setVisibility(View.GONE);
                            break;
                        case 2:
                            passView1.setVisibility(View.VISIBLE);
                            passView2.setVisibility(View.GONE);
                            break;
                        case 3:
                            passView2.setVisibility(View.VISIBLE);
                            break;
                    }
                }else{
                    passLayout.setVisibility(View.GONE);
                }
            }
        });
    }

    private int checkPassWord(String passwordStr){
        String regexZ = "\d*";
        String regexS = "[a-zA-Z]+";
        String regexT = "\W+$";
        String regexZT = "\D*";
        String regexST = "[\d\W]*";
        String regexZS = "\w*";
        String regexZST = "[\w\W]*";

        int pass = 0;
        if (passwordStr.matches(regexZ)) {
            return 1;
        }
        if (passwordStr.matches(regexS)) {
            return 1;
        }
        if (passwordStr.matches(regexT)) {
            return 1;
        }
        if (passwordStr.matches(regexZT)) {
            return 2;
        }
        if (passwordStr.matches(regexST)) {
            return 2;
        }
        if (passwordStr.matches(regexZS)) {
            return 2;
        }
        if (passwordStr.matches(regexZST)) {
            return 3;
        }
        return pass;
    }
}

activity_test05.xml代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".test02.Test05Activity">
    <LinearLayout
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="45dp">
        <EditText
            android:id="@+id/passwordEdit"
            android:hint="请输入密码"
            android:singleLine="true"
            android:maxLength="16"
            android:digits="0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ."
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_marginRight="@dimen/dp_10"
            android:layout_height="match_parent"/>
        <Button
            android:id="@+id/btnClean"
            android:text="清除"
            android:layout_width="80dp"
            android:layout_height="match_parent"/>
    </LinearLayout>
    <LinearLayout
        android:visibility="gone"
        android:id="@+id/passwordLayout"
        android:layout_marginRight="10dp"
        android:layout_marginLeft="10dp"
        android:gravity="center_vertical"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="45dp">
        <TextView
            android:text="密码强度："
            android:textColor="#333"
            android:textSize="16sp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
        <View
            android:background="#E03D06"
            android:layout_width="40dp"
            android:layout_height="15dp"/>
        <View
            android:visibility="gone"
            android:id="@+id/passwordView1"
            android:layout_marginLeft="5dp"
            android:background="#F2831A"
            android:layout_width="40dp"
            android:layout_height="15dp"/>
        <View
            android:visibility="gone"
            android:id="@+id/passwordView2"
            android:layout_marginLeft="5dp"
            android:background="#6A9F09"
            android:layout_width="40dp"
            android:layout_height="15dp"/>
    </LinearLayout>
</LinearLayout>