Android-UI控件的使用

在Android Studio中使用自带的控件来做一些Demo

这个界面使用了TextView Button progressBar editText radioGroup seekBar ratingBar
1、TextView
就是文本显示框，可以显示一些自定义的文字
2、Button按钮控件
用来实现一些事件操作
3、progressBar
实现程序的加载动画
4、editText
文本编辑栏，可以实现输入然后得到反馈
5、radioGroup
在这个组当中添加radioButton，然后就可以像单选题一样进行选择
6、seekBar
一个条形拖动条
7、ratingBar
最下面的那个五星
代码demo

//先导入库
package com.example.application00;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.RadioGroup;
import android.widget.RatingBar;
import android.widget.SeekBar;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity{
	private TextView textview;
	private Button button1,button2,button3;
	private Switch aSwitch;
	ProgressBar progressBar;
	EditText editText;
	RadioGroup radioGroup;
	ImageView imageView;
	SeekBar seekBar;
	RatingBar ratingBar;
	@Override
	protected void onCreate(Bundle savedInstanceState){
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		this.textview = findViewById(R.id.text1);
		this.button1 = findViewById(R.id.button1);
        this.button2 = findViewById(R.id.button2);
        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                textview.setText("Left");
            }
        });
        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                textview.setText("Right");
            }
        });
        button3 = findViewById(R.id.button4);
        aSwitch = findViewById(R.id.switch2);
        progressBar = findViewById(R.id.progressBar3);
        editText = findViewById(R.id.editText);
        radioGroup = findViewById(R.id.radioGroup);
        imageView = findViewById(R.id.imageView);
        seekBar = findViewById(R.id.seekBar);
        ratingBar = findViewById(R.id.ratingBar);
        //做监听器
        aSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if(isChecked == true) {
                    textview.setText("Switch On");
                }
                else{
                    textview.setText("Switch Off");
                }
            }
        });
        button3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String s = editText.getText().toString();
                if (TextUtils.isEmpty(s)){
                    s = "0";
                }
                else{
                    progressBar.setProgress(Integer.valueOf(s));
                }
                textview.setText(s);
            }
        });
        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                if(checkedId ==R.id.radioButton){
                    imageView.setImageResource(R.drawable.x1);
                }
                else{
                    imageView.setImageResource(R.drawable.x13);
                }
            }
        });
        seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                textview.setText(String.valueOf(progress));
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                //管触控的跟踪的
            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });
        ratingBar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
            @Override
            public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {
                Toast.makeText(getApplicationContext(),String.valueOf(rating)+"星评价",Toast.LENGTH_SHORT).show();
                //Toast 显示方法就是显示出
            }
        });
	}
}