Android实例EditText右下角显示剩余字数.doc

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1、[Android实例]edittext右下角显示剩余字数packagecom.myfiftycents.personchildactivity;importjava.security.PublicKey;importjavax.security.auth.PrivateCredentialPermission;importcom.myfiftycents.R;importandroid.R.integer;importandroid.app.Activity;importandroid.os.Bundle;importandroid.text.Editable;impor

2、tandroid.text.TextWatcher;importandroid.text.InputFilter.LengthFilter;importandroid.view.View;importandroid.view.View.OnFocusChangeListener;importandroid.widget.EditText;importandroid.widget.TextView;publicclassPersonChildTextReleaseextendsActivity{ privateEditTextedit_person_text_release

3、; privateTextViewtv_person_text_release_number; privatestaticfinalintMAX_NUMBER=300; @Override protectedvoidonCreate(BundlesavedInstanceState){ //TODOAuto-generatedmethodstub super.onCreate(savedInstanceState); setContentView(R.layout.activity_person_text_release); edit_person_text_releas

4、e=(EditText)findViewById(R.id.edit_person_text_release); tv_person_text_release_number=(TextView)findViewById(R.id.tv_person_text_release_number); edit_person_text_release.clearFocus(); edit_person_text_release  .setSelection(edit_person_text_release.length()); edit_person_text_release.ad

5、dTextChangedListener(mTextWatcher); finalStringstr=edit_person_text_release.getHint().toString().trim(); setLeftCount(); edit_person_text_release  .setOnFocusChangeListener(newOnFocusChangeListener(){   @Override   publicvoidonFocusChange(Viewarg0,booleanarg1){   if(arg1){    edit_person_

6、text_release.setHint("");   }else{    edit_person_text_release.setHint(str);   }   }  }); } privateTextWatchermTextWatcher=newTextWatcher(){ privateintedit_start; privateintedit_end; @Override publicvoidonTextChanged(CharSequencearg0,intarg1,intarg2,  intarg3){  //TODOAuto-generatedmethod

7、stub } @Override publicvoidbeforeTextChanged(CharSequencearg0,intarg1,intarg2,  intarg3){  //TODOAuto-generatedmethodstub } @Override publicvoidafterTextChanged(Editablestr){  edit_start=edit_person_text_release.getSelectionStart();  edit_end=edit_person_text_releas