android自定义edittext 当有文字时怎么禁止长按全选事件
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参考技术A 你给复选框设置监听事件,当选中的时候,就给edittext.setText如:checkbox.setOnCheckedChangeListener(newCompoundButton.OnCheckedChangeListener()@OverridepublicvoidonCheckedChanged(CompoundButtonbuttonView,booleanisChecked)//TODOAuto-generatedmethodstubif(isChecked)editText1.setText("选中");elseeditText1.setText("取消选中"););自己定义绘制android EditText的背景,定义EditText文字的显示样式
EditText能够通过layer-list来绘制背景:
<?xml version="1.0" encoding="utf-8"?
> <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item> <shape android:shape="rectangle" //框为矩形 > <solid android:color="#FFFFFF" /> //用白色来填充里面 <stroke //边框是1dp的线 android:width="1dp" android:color="#AEAEAE" /> <corners android:radius="10dp"/> //边框的圆角的弧度 </shape> </item> </layer-list>
写Layout:
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:background="#FFFFFF" > <include layout="@layout/title_list" /> <View android:layout_below="@id/title" android:id="@+id/line" android:layout_width="fill_parent" android:layout_height="2dip" android:background="@drawable/rc_list_divider" /> <RelativeLayout android:layout_width="fill_parent" android:layout_height="150dp" android:layout_marginLeft="20dp" android:layout_marginRight="20dp" android:layout_centerInParent="true"> <EditText android:id="@+id/custom_edittext" android:layout_width="fill_parent" android:layout_height="150dp" //跟parent height一致所以left_word_num能够在背景框里面 android:background="@drawable/reply_custom_message_edit_background" android:gravity="left|top" android:hint="please inputsomething" android:paddingBottom="24dp" android:paddingLeft="12dp" android:paddingRight="12dp" android:paddingTop="17dp" android:textColor="#000000" android:textColorHint="#AEAEAE" android:textSize="20sp" /> <TextView android:id="@+id/other_char_hint" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBottom="@id/custom_edittext" android:layout_alignParentBottom="true" android:paddingBottom="10dp" android:paddingLeft="12dp" android:text="0" android:textColor="#AEAEAE" android:textSize="14sp" android:visibility="gone"></TextView> <TextView android:id="@+id/left_word_num" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:paddingBottom="10dp" android:paddingRight="10dp" android:text="200" android:textColor="#000000" android:textSize="14sp"></TextView> </RelativeLayout> </RelativeLayout>
代码中实现一些EditText变化的时候处理逻辑(眼下的逻辑是不让输入中文字符:
private EditText mCustom_edittext; private TextView left_word_num; private static final int MAX_INPUT_NUM = 200; private TextView other_char_hint; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.edittext); mCustom_edittext = (EditText)findViewById(R.id.custom_edittext); other_char_hint = (TextView)findViewById(R.id.other_char_hint); other_char_hint.setText("only enlish accepted"); left_word_num = (TextView) findViewById(R.id.left_word_num); mCustom_edittext.addTextChangedListener(new TextWatcher() { private CharSequence temp; private int selectionStart; private int selectionEnd; @Override public void onTextChanged(CharSequence s, int start, int before, int count) { } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { temp = s; } @Override public void afterTextChanged(Editable s) { selectionStart = mCustom_edittext.getSelectionStart(); selectionEnd = mCustom_edittext.getSelectionEnd(); String lastword = s.toString().trim(); if (lastword.length() > 0) { lastword = lastword.substring(lastword.length() - 1, lastword.length()); if(!isContentValid(temp.toString())) { other_char_hint.setVisibility(View.VISIBLE); for(int i=0;i < temp.toString().length();i++) { String temp1 = temp.toString().substring(i, i+1); if(!isInputValid(temp1)) { //使用setSpan使EditText字底下画黑线 s.setSpan(new UnderlineSpan(), i, i+1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); } } }else{ other_char_hint.setVisibility(View.GONE); } }else{ other_char_hint.setVisibility(View.GONE); } left_word_num.setText(String.valueOf(MAX_INPUT_NUM - temp.length())); } }); } private boolean isContentValid(String content) { for(int i=0;i < content.length(); i++) { String value = content.substring(i,i+1); if(!isInputValid(value)) { return false; } } return true; } private boolean isInputValid(String s) { byte[] ch_array = s.getBytes(); if (ch_array.length == 1) { return true; } else { return false; } }
效果图:
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