Android:控件AutoCompleteTextView 和MultiAutoCompleteTextView的使用
2017-03-22 16:10
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AutoCompleteTextView
支持基本的自动完成功能,
MultiAutoCompleteTextView
可支持选择多个值(在多次输入的情况下),分别用分隔符分开,并且在每个值选中的时候再次输入值时会自动去匹配
基本用法:
public class MainActivity extends AppCompatActivity {
private AutoCompleteTextView mAutoC_tv ;
private MultiAutoCompleteTextView mMultiAuto_tv;
//定义适配数组
private String[] res = {"aaaa", "aabb", "bbbb", "cccc", "bbbccc", "aacc", "bbbccc"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAutoC_tv =(AutoCompleteTextView) findViewById(R.id.autoC_tv);
//设置适配器
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, res);
mAutoC_tv.setAdapter(adapter);
mMultiAuto_tv = (MultiAutoCompleteTextView) findViewById(R.id.multiauto_tv) ;
mMultiAuto_tv.setAdapter(adapter);
//设置分隔符(逗号)
mMultiAuto_tv.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());
}
}
如果要使用自己自定义的分隔符,需要写一个类继承Tokenizer接口,然后实现里面的方法。这里可以先查看MultiAutoCompleteTextView.CommaTokenizer()的源码,然后再自己实现。
public class SemicolonTokenizer implements MultiAutoCompleteTextView.Tokenizer {
private char charS;
private String mString;
public SemicolonTokenizer(char charS) {
this.charS = charS;
mString= String.valueOf(charS);
}
public int findTokenStart(CharSequence text, int cursor) {
int i = cursor;
while (i > 0 && text.charAt(i - 1) != charS) {
i--;
}
while (i < cursor && text.charAt(i) == ' ') {
i++;
}
return i;
}
public int findTokenEnd(CharSequence text, int cursor) {
int i = cursor;
int len = text.length();
while (i < len) {
if (text.charAt(i) == charS) {
return i;
} else {
i++;
}
}
return len;
}
public CharSequence terminateToken(CharSequence text) {
int i = text.length();
while (i > 0 && text.charAt(i - 1) == ' ') {
i--;
}
if (i > 0 && text.charAt(i - 1) == charS) {
return text;
} else {
if (text instanceof Spanned) {
SpannableString sp = new SpannableString(text + mSTring);
TextUtils.copySpansFrom((Spanned) text, 0, text.length(), Object.class, sp, 0);
return sp;
} else {
return text + mString;
}
}
}
}
这样我们在设置分隔符是直接使用我们自定义的符号,例如:
//设置分隔符(逗号)
mMultiAuto_tv.setTokenizer(newSemicolonTokenizer(';'));
支持基本的自动完成功能,
MultiAutoCompleteTextView
可支持选择多个值(在多次输入的情况下),分别用分隔符分开,并且在每个值选中的时候再次输入值时会自动去匹配
基本用法:
public class MainActivity extends AppCompatActivity {
private AutoCompleteTextView mAutoC_tv ;
private MultiAutoCompleteTextView mMultiAuto_tv;
//定义适配数组
private String[] res = {"aaaa", "aabb", "bbbb", "cccc", "bbbccc", "aacc", "bbbccc"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAutoC_tv =(AutoCompleteTextView) findViewById(R.id.autoC_tv);
//设置适配器
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, res);
mAutoC_tv.setAdapter(adapter);
mMultiAuto_tv = (MultiAutoCompleteTextView) findViewById(R.id.multiauto_tv) ;
mMultiAuto_tv.setAdapter(adapter);
//设置分隔符(逗号)
mMultiAuto_tv.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());
}
}
如果要使用自己自定义的分隔符,需要写一个类继承Tokenizer接口,然后实现里面的方法。这里可以先查看MultiAutoCompleteTextView.CommaTokenizer()的源码,然后再自己实现。
public class SemicolonTokenizer implements MultiAutoCompleteTextView.Tokenizer {
private char charS;
private String mString;
public SemicolonTokenizer(char charS) {
this.charS = charS;
mString= String.valueOf(charS);
}
public int findTokenStart(CharSequence text, int cursor) {
int i = cursor;
while (i > 0 && text.charAt(i - 1) != charS) {
i--;
}
while (i < cursor && text.charAt(i) == ' ') {
i++;
}
return i;
}
public int findTokenEnd(CharSequence text, int cursor) {
int i = cursor;
int len = text.length();
while (i < len) {
if (text.charAt(i) == charS) {
return i;
} else {
i++;
}
}
return len;
}
public CharSequence terminateToken(CharSequence text) {
int i = text.length();
while (i > 0 && text.charAt(i - 1) == ' ') {
i--;
}
if (i > 0 && text.charAt(i - 1) == charS) {
return text;
} else {
if (text instanceof Spanned) {
SpannableString sp = new SpannableString(text + mSTring);
TextUtils.copySpansFrom((Spanned) text, 0, text.length(), Object.class, sp, 0);
return sp;
} else {
return text + mString;
}
}
}
}
这样我们在设置分隔符是直接使用我们自定义的符号,例如:
//设置分隔符(逗号)
mMultiAuto_tv.setTokenizer(newSemicolonTokenizer(';'));
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