ProgressBar(进度条)与SeekBar(拖动条)

1.ProgressBar(进度条)

(1)介绍

(2)常用属性

(3)xml代码

<ProgressBar
        android:id="@+id/progressBar2"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="match_parent"
        android:layout_height="48dp"
        android:max="100"
        android:progress="90" />

2.Seeker(拖动条)

(1)介绍

(2)属性介绍

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(3)xml布局文件

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


    <ProgressBar
        android:id="@+id/progressBar"
        android:max="100"
        android:progress="70"
        style="?android:attr/progressBarStyle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <ProgressBar
        android:id="@+id/progressBar2"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="match_parent"
        android:layout_height="48dp"
        android:max="100"
        android:progress="90" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:srcCompat="@mipmap/img1" />

    <SeekBar
        android:id="@+id/seekBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

(4)java后台文件

package com.lucky.test24;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.SeekBar;

public class MainActivity extends AppCompatActivity {

    ImageView imageView;
    SeekBar seekBar;
    ProgressBar progressBar;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView=findViewById(R.id.imageView);
        seekBar=findViewById(R.id.seekBar);
        progressBar=findViewById(R.id.progressBar2);

        seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            //状态发生改变时，触发的方法
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                progressBar.setProgress(progress);  //设置进度条的进度
                imageView.setAlpha(progress);     //设置图片的亮度
            }

            //刚开始拖动时触发的方法
            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            //拖动结束后触发的方法
            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });
    }
}