EditText怎么改变输入密码字符的等待时间
客户感觉输入密码字符的等待时间太长了 要将时间变短 怎么可以缩短等待时间
--------------------编程问答--------------------
这个可能就要修改framework了,重新编译一遍，放到你的android系统里替代原来的
--------------------编程问答--------------------
这个到没弄过！呵呵，帮顶下！
--------------------编程问答--------------------
楼主可以看看TextView.setTransformationMethod(TransformationMethod) 方法显示密码应该使用的TransformationMethod是android.text.method.PasswordTransformationMethod
--------------------编程问答-------------------- 可以试试自己实现一个TransformationMethod类
通过调用TextView.setTransformationMethod，来代替系统PasswordTransformationMethod --------------------编程问答--------------------
请问framework 怎么修改？ --------------------编程问答--------------------
我要的不是显示 是改变等待时间 客户要求不要那里长时间 --------------------编程问答-------------------- 自己写一个吧 监听按键按下 把收到键值的缓存起来 把*显示出去 --------------------编程问答-------------------- --------------------编程问答-------------------- --------------------编程问答--------------------
楼主可以看看PasswordTransformationMethod的源代码，貌似那个延时就是在PasswordTransformationMethod里面做的 --------------------编程问答--------------------
我不是要他显示不出来 只是想等待时间变得短一点 --------------------编程问答--------------------
我在PasswordTransformationMethod 看到这样的一段代码
private static class Visible
extends Handler
implements UpdateLayout, Runnable
{
public Visible(Spannable sp, PasswordTransformationMethod ptm) {
mText = sp;
mTransformer = ptm;
postAtTime(this, SystemClock.uptimeMillis() + 1500);
}
public void run() {
mText.removeSpan(this);
}
private Spannable mText;
private PasswordTransformationMethod mTransformer;
}
是继承并覆写这个方法吗？ --------------------编程问答-------------------- 显示密码应该使用的TransformationMethod是android.text.method.PasswordTransformationMethod
--------------------编程问答-------------------- 谢谢楼上和楼主的提醒。自己用了最笨的方法，将源码复制后修改了下，并定义一个新类MPasswordTransformationMethod。
然后可以直接钓用TextView.setsetTransformationMethod(MPasswordTransformationMethod.getInstance())
/*
* 修改PasswordTransformationMethod源码
*
*/
import android.os.Handler;
import android.os.SystemClock;
import android.graphics.Rect;
import android.view.View;
import android.text.Editable;
import android.text.GetChars;
import android.text.NoCopySpan;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.text.Spanned;
import android.text.Spannable;
import android.text.method.TransformationMethod;
import android.text.style.UpdateLayout;
import java.lang.ref.WeakReference;
public class MPasswordTransformationMethod
implements TransformationMethod, TextWatcher
{
//笨方法，从别的包引用的静态常量直接在类里定义
private static final Object TextKeyListener_ACTIVE = new NoCopySpan.Concrete();
public CharSequence getTransformation(CharSequence source, View view) {
if (source instanceof Spannable) {
Spannable sp = (Spannable) source;
/**
* Remove any references to other views that may still be
* attached. This will happen when you flip the screen
* while a password field is showing; there will still
* be references to the old EditText in the text.
*/
ViewReference[] vr = sp.getSpans(0, sp.length(),
ViewReference.class);
for (int i = 0; i < vr.length; i++) {
sp.removeSpan(vr[i]);
}
removeVisibleSpans(sp);
sp.setSpan(new ViewReference(view), 0, 0,
Spannable.SPAN_POINT_POINT);
}
return new PasswordCharSequence(source);
}
public static MPasswordTransformationMethod getInstance() {
if (sInstance != null)
return sInstance;
sInstance = new MPasswordTransformationMethod();
return sInstance;
}
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
// This callback isn't used.
}
public void onTextChanged(CharSequence s, int start,
int before, int count) {
if (s instanceof Spannable) {
Spannable sp = (Spannable) s;
ViewReference[] vr = sp.getSpans(0, s.length(),
ViewReference.class);
if (vr.length == 0) {
return;
}
/**
* There should generally only be one ViewReference in the text,
* but make sure to look through all of them if necessary in case
* something strange is going on. (We might still end up with
* multiple ViewReferences if someone moves text from one password
* field to another.)
*/
View v = null;
for (int i = 0; v == null && i < vr.length; i++) {
v = vr[i].get();
}
if (v == null) {
return;
}
// int pref = TextKeyListener.getInstance().getPrefs(v.getContext()); //注释
// if ((pref & TextKeyListener.SHOW_PASSWORD) != 0) { //注释
if (true) { //将if的条件改为true
if (count > 0) {
removeVisibleSpans(sp);
if (count == 1) {
sp.setSpan(new Visible(sp, this), start, start + count,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
}
}
}
public void afterTextChanged(Editable s) {
// This callback isn't used.
}
public void onFocusChanged(View view, CharSequence sourceText,
boolean focused, int direction,
Rect previouslyFocusedRect) {
if (!focused) {
if (sourceText instanceof Spannable) {
Spannable sp = (Spannable) sourceText;
removeVisibleSpans(sp);
}
}
}
private static void removeVisibleSpans(Spannable sp) {
Visible[] old = sp.getSpans(0, sp.length(), Visible.class);
for (int i = 0; i < old.length; i++) {
sp.removeSpan(old[i]);
}
}
private static class PasswordCharSequence
implements CharSequence, GetChars
{
public PasswordCharSequence(CharSequence source) {
mSource = source;
}
public int length() {
return mSource.length();
}
public char charAt(int i) {
if (mSource instanceof Spanned) {
Spanned sp = (Spanned) mSource;
int st = sp.getSpanStart(TextKeyListener_ACTIVE);
int en = sp.getSpanEnd(TextKeyListener_ACTIVE);
if (i >= st && i < en) {
return mSource.charAt(i);
}
Visible[] visible = sp.getSpans(0, sp.length(), Visible.class);
for (int a = 0; a < visible.length; a++) {
if (sp.getSpanStart(visible[a].mTransformer) >= 0) {
st = sp.getSpanStart(visible[a]);
en = sp.getSpanEnd(visible[a]);
if (i >= st && i < en) {
return mSource.charAt(i);
}
}
}
}
return DOT;
}
public CharSequence subSequence(int start, int end) {
char[] buf = new char[end - start];
getChars(start, end, buf, 0);
return new String(buf);
}
public String toString() {
return subSequence(0, length()).toString();
}
public void getChars(int start, int end, char[] dest, int off) {
TextUtils.getChars(mSource, start, end, dest, off);
int st = -1, en = -1;
int nvisible = 0;
int[] starts = null, ends = null;
if (mSource instanceof Spanned) {
Spanned sp = (Spanned) mSource;
st = sp.getSpanStart(TextKeyListener_ACTIVE);
en = sp.getSpanEnd(TextKeyListener_ACTIVE);
Visible[] visible = sp.getSpans(0, sp.length(), Visible.class);
nvisible = visible.length;
starts = new int[nvisible];
ends = new int[nvisible];
for (int i = 0; i < nvisible; i++) {
if (sp.getSpanStart(visible[i].mTransformer) >= 0) {
starts[i] = sp.getSpanStart(visible[i]);
ends[i] = sp.getSpanEnd(visible[i]);
}
}
}
for (int i = start; i < end; i++) {
if (! (i >= st && i < en)) {
boolean visible = false;
for (int a = 0; a < nvisible; a++) {
if (i >= starts[a] && i < ends[a]) {
visible = true;
break;
}
}
if (!visible) {
dest[i - start + off] = DOT;
}
}
}
}
private CharSequence mSource;
}
private static class Visible
extends Handler
implements UpdateLayout, Runnable
{
public Visible(Spannable sp, MPasswordTransformationMethod ptm) {
mText = sp;
mTransformer = ptm;
/*
* 从这里修改字符改变的等待时间
*/
postAtTime(this, SystemClock.uptimeMillis() + 150);
}
public void run() {
mText.removeSpan(this);
}
private Spannable mText;
private MPasswordTransformationMethod mTransformer;
}
/***
* Used to stash a reference back to the View in the Editable so we
* can use it to check the settings.
*/
private static class ViewReference extends WeakReference<View>
implements NoCopySpan {
public ViewReference(View v) {
super(v);
}
}
private static MPasswordTransformationMethod sInstance;
private static char DOT = '\u2022';
}
补充：移动开发 , Android
