Android笔记：前端判断敏感词汇

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="visahall.cn.xiaoxin.MainActivity">
 
    <Button
        android:id="@+id/btn"
        android:text="点击确定把EditText中的字显示在TextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true" />
 
    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        android:layout_below="@+id/btn"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="196dp" />
 
    <EditText
        android:id="@+id/edit"
        android:hint="敏感字为 美国， 西班牙， 德玛西亚"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/btn"
        android:layout_alignParentStart="true" />
</RelativeLayout>

public class MainActivity extends AppCompatActivity {
 
    private Button button;
    private EditText editText;
    private TextView textView;
    private List<String> list = new ArrayList<>();
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        init();
 
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String aa = String.valueOf(editText.getText());
 
                for (int i = 0; i < list.size(); i++) {
                    String x = list.get(i);  //x为敏感词汇
                    if (aa.contains(x)){
                        aa = aa.replaceAll(x, getXing(x));
                    }
                }
                textView.setText(aa);
            }
        });
 
    }
 
    private void init() {
        button = (Button) findViewById(R.id.btn);
        editText = (EditText) findViewById(R.id.edit);
        textView = (TextView) findViewById(R.id.text);
 
        list.add("国家级");
        list.add("第一");
        list.add("史上");
        list.add("垃圾");
    }
 
    //得到"*"的数量，然后进行替换相应的字符串
    private String getXing(String f){
        String a = "";
        for (int i = 0; i < f.length(); i++) {
            a = a + "*";
        }
        return a;
    }
}