我想一個按鈕和一個滑塊編寫一個簡單的Android應用程序:我的Java程序如下:搜索欄不工作(setOnSeekBarChangeListener(SeekBar.OnSeekBarChangeListener錯誤)
package com.example.android.apis.view;
import com.example.android.apis.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextSwitcher;
import android.widget.TextView;
import android.widget.ViewSwitcher;
/**
* Uses a TextSwitcher.
*/
public class TextSwitcher1 extends Activity implements ViewSwitcher.ViewFactory,
View.OnClickListener, OnSeekBarChangeListener {
SeekBar mSeekBar;
TextView mProgressText;
TextView mTrackingText;
private TextSwitcher mSwitcher;
private int mCounter = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.text_switcher_1);
setContentView(R.layout.seekbar_1);
mSeekBar = (SeekBar)findViewById(R.id.seek);
mSeekBar.setOnSeekBarChangeListener(this);
mProgressText = (TextView)findViewById(R.id.progress);
mTrackingText = (TextView)findViewById(R.id.tracking);
mSwitcher = (TextSwitcher) findViewById(R.id.switcher);
mSwitcher.setFactory(this);
Button nextButton = (Button) findViewById(R.id.next);
nextButton.setOnClickListener(this);
updateCounter();
}
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromTouch) {
mProgressText.setText(progress + " " +
getString(R.string.seekbar_from_touch) + "=" + fromTouch);
}
public void onStartTrackingTouch(SeekBar seekBar) {
mTrackingText.setText(getString(R.string.seekbar_tracking_on));
}
public void onStopTrackingTouch(SeekBar seekBar) {
mTrackingText.setText(getString(R.string.seekbar_tracking_off));
}
public void onClick(View v) {
mCounter++;
updateCounter();
}
private void updateCounter() {
mSwitcher.setText(String.valueOf(mCounter));
}
public View makeView() {
TextView t = new TextView(this);
t.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL);
t.setTextSize(36);
return t;
}
}
我得到這個錯誤:該方法setOnSeekBarChangeListener(SeekBar.OnSeekBarChangeListener)在類型搜索欄並不適用於在該行的參數(TextSwitcher1):mSeekbar.setonSeekbarChangeListener(本);
我不知道這是什麼問題,請你幫我解決它。 非常感謝您提前, 斯特凡