我读了一个示例,该示例显示如何在此网页的edittext中显示搜索栏的进度:
Simple Seekbar In Android
现在我的问题是,如果我在edittext框中引入一个数字,如何更改搜索栏?谢谢你的帮助
如果您可以访问该网页,我还将发布代码:
主要:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
<EditText
android:id="@+id/editText1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginTop="94dp" >
<requestFocus />
</EditText>
<SeekBar
android:id="@+id/seekBar1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textView1"
android:layout_marginTop="38dp" />
</RelativeLayout>
和Java代码:
import android.app.Activity;
import android.os.Bundle;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
public class SeekbarActivity extends Activity
{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
SeekBar sb=(SeekBar) findViewById(R.id.seekBar1);
final EditText et=(EditText) findViewById(R.id.editText1);
sb.setOnSeekBarChangeListener(new OnSeekBarChangeListener()
{
@Override
public void onStopTrackingTouch(SeekBar seekBar)
{
}
@Override
public void onStartTrackingTouch(SeekBar seekBar)
{
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser)
{
//---change the font size of the EditText---
et.setText(String.valueOf(progress));
}
});
}
}
最佳答案
使用addTextChangedListener
一个简单的例子:
//et and sk are class variables
et=(EditText)findViewById(R.id.editText);
sk = (SeekBar)findViewById(R.id.seekBar);
et.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
try{
//Update Seekbar value after entering a number
sk.setProgress(Integer.parseInt(s.toString()));
} catch(Exception ex) {}
}
});
关于java - 如何使用edittext更新搜索栏,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/16550872/