Android移动开发基础案例代码实现.zip

package com.example.listener; import androidx.appcompat.app.AlertDialog; import androidx.appcompat.app.AppCompatActivity; import android.app.ProgressDialog; import android.content.DialogInterface; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { private Button button; private Button button2; private Button button3; private Button button4; private TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.layout1); button=findViewById(R.id.bn1); button2=findViewById(R.id.bn2); button3=findViewById(R.id.bn3); button4=findViewById(R.id.bn4); textView=findViewById(R.id.textView); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { button.setText("ennn"); AlertDialog.Builder alertDialog; alertDialog=new AlertDialog.Builder(MainActivity.this); alertDialog.setTitle("AlertDlalog"); alertDialog.setMessage("你想怎么选"); alertDialog.setPositiveButton("ok", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { textView.setText("I am studying"); } }); alertDialog.setNegativeButton("no", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { textView.setText("I am sleeping"); } }); alertDialog.create(); alertDialog.show(); } }); button2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { final AlertDialog.Builder alertone; alertone=new AlertDialog.Builder(MainActivity.this); alertone.setTitle("请选择性别"); final String items[]={"男","女"}; alertone.setSingleChoiceItems(items, -1, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { String item=items[i]; textView.setText("性别："+item); } }); alertone.setPositiveButton("确定",null); alertone.show(); } }); button3.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { AlertDialog.Builder duoxuan; duoxuan=new AlertDialog.Builder(MainActivity.this); duoxuan.setTitle("请添加兴趣爱好"); final String hobbies[]={"旅游","美食","汽车","宠物"}; final boolean[] check={false,false,false,false}; duoxuan.setMultiChoiceItems(hobbies, null, new DialogInterface.OnMultiChoiceClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i, boolean b) { if(b){ check[i]=true; //检查是否被选中 } } }); duoxuan.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { StringBuffer temps=new StringBuffer(); for (int j=0;j<hobbies.length;j++){ if(check[j]){ String temp=hobbies[j]; temps.append(temp+" "); Toast.makeText(MainActivity.this, temps, Toast.LENGTH_SHORT).show(); } } textView.setText(temps); } }); duoxuan.show(); } }); button4.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { ProgressDialog progressDialog; progressDialog=new ProgressDialog(MainActivity.this); progressDialog.setTitle("进度条对话框"); progressDialog.setMessage("下载中，请稍后"); //水平进度条 progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); progressDialog.show(); } }); } }