一:进度条控件
<ProgressBar>
<ProgressBar android:id="@+id/pd" android:layout_width="wrap_content" android:layout_height="wrap_content" />
2,新建一个控件
3,在java目录下Activity中代码
package com.sdbi.myapplication4; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.ProgressBar; public class MainActivity extends AppCompatActivity { private ProgressBar progressBar; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); progressBar = findViewById(R.id.pd); } public void leoClick(View view) { if (progressBar.getVisibility()==View.GONE){ progressBar.setVisibility(View.VISIBLE); }else { progressBar.setVisibility(View.GONE); } } }
单击控件 进行显示隐藏进度条