seekbar +DialogFragment 簡單使用

1.解耦
 2.代碼清晰，易維護      

### 如何調用 dialogFragment

 FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
        CustomDialogFragment customDialogFragment = new CustomDialogFragment();
        customDialogFragment.show(fragmentManager, DIALOG_DATE);


---------------

### DIALOGFRAGMENT
package com.lepu.stethoscopic.fun.functiion.profile;

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.view.View;
import android.widget.SeekBar;
import android.widget.TextView;

import com.lepu.stethoscopic.R;
import com.lepu.stethoscopic.config.UserConfig;

/**
 * Created by Administrator on 2015/10/8.
 * 公式  (40 - progress) * 0.5
 */
public class CustomDialogFragment extends DialogFragment implements SeekBar.OnSeekBarChangeListener {

    private TextView textView;
    private int lastValue;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        lastValue = UserConfig.getConfigInt(getActivity(), "gainvalue", 40);//40 代表中間位置
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

        View viewDialog = getActivity().getLayoutInflater().inflate(R.layout.view_progress_bar, null);

        final SeekBar seekBar = (SeekBar) viewDialog.findViewById(R.id.seekBar);
        textView = (TextView) viewDialog.findViewById(R.id.gain_value);
        seekBar.setMax(80);
        //讀取出來上次儲存，進行初始化
        seekBar.setProgress(lastValue);
        textView.setText(lastValue > 40 ? "+" + (lastValue - 40) * 0.5 + " dB" : "-" + (40 - lastValue) * 0.5 + " dB");
        seekBar.setOnSeekBarChangeListener(this);
        return new AlertDialog.Builder(getActivity())
                .setTitle(R.string.settingzy)
                .setView(viewDialog)
                .setNegativeButton(R.string.cancel, null).setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        String value = textView.getText().toString();
                        String result = value.split("dB")[0];
                        //進行存儲
                        float floatValue = (Float.valueOf(result) + 20) * 2;
                        UserConfig.setConfig(getActivity(), "gainvalue", (int) floatValue);
                        //進行資料的處理
                        //UIHelper.showToast(getActivity(), "" + floatValue);
                    }
                }).create();
    }

    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
        seekBar.setProgress(progress);
        if (progress < 40) {
            textView.setText("-" + (40 - progress) * 0.5 + " dB");
        } else if (progress > 40) {
            textView.setText("+" + (progress - 40) * 0.5 + " dB");
        } else {
            textView.setText("0.0 dB");
        }
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {

    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {

    }
}


布局檔案


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:layout_marginTop="5dp"
        android:gravity="left|center"
        android:letterSpacing="10"
        android:text="@string/gaintips" />

    <LinearLayout

        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <SeekBar
            android:id="@+id/seekBar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="15dp"
            android:layout_marginRight="5dp"
            android:layout_marginTop="5dp"
            android:layout_weight="1" />

        <TextView
            android:id="@+id/gain_value"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_weight="3"
            android:gravity="center"
            android:text="0.0 dB"
            android:textSize="18dp" />

    </LinearLayout>

</LinearLayout>