前言：AlertDialog 为警告对话框，可以实现多种样式。
分别为：
- 默认样式
- 单选样式
- 多选样式
- 自定义样式
接下来我会通过代码实现这些样式
首先实现布局页面：
activity_dialog.xml
<?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" tools:context=".DialogActivity" android:orientation="vertical" > <Button android:id="@+id/btn_dialog1" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="AlertDialog样式1" /> <Button android:id="@+id/btn_dialog2" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="AlertDialog样式2" /> <Button android:id="@+id/btn_dialog3" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="AlertDialog样式3" /> <Button android:id="@+id/btn_dialog4" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="AlertDialog样式4" /> <Button android:id="@+id/btn_dialog5" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="AlertDialog样式5" /> </LinearLayout>
实现五种不同的样式AlertDialog
在DialogActivity 中实现，代码如下，具体详解已经在注释中给出
public class DialogActivity extends AppCompatActivity implements View.OnClickListener { private Button btn_dialog1; private Button btn_dialog2; private Button btn_dialog3; private Button btn_dialog4; private Button btn_dialog5; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_dialog); btn_dialog1 = findViewById(R.id.btn_dialog1); btn_dialog2 = findViewById(R.id.btn_dialog2); btn_dialog3 = findViewById(R.id.btn_dialog3); btn_dialog4 = findViewById(R.id.btn_dialog4); btn_dialog5 = findViewById(R.id.btn_dialog5); btn_dialog1.setOnClickListener(this); btn_dialog2.setOnClickListener(this); btn_dialog3.setOnClickListener(this); btn_dialog4.setOnClickListener(this); btn_dialog5.setOnClickListener(this); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.btn_dialog1: AlertDialog.Builder builder = new AlertDialog.Builder(DialogActivity.this); builder.setTitle("请选择").setMessage("你确定要退出吗？") .setIcon(R.drawable.background) //设置图标 .setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(DialogActivity.this, "确定", Toast.LENGTH_SHORT).show(); } }).setNeutralButton("我再想想", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(DialogActivity.this, "我再想想", Toast.LENGTH_SHORT).show(); } }).setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(DialogActivity.this, "取消", Toast.LENGTH_SHORT).show(); } }).show(); break; case R.id.btn_dialog2: String[] array = new String[]{"男","女"}; AlertDialog.Builder builder1 = new AlertDialog.Builder(DialogActivity.this); builder1.setTitle("选择性别").setSingleChoiceItems(array, 0, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(DialogActivity.this, array[which]+"", Toast.LENGTH_SHORT).show(); } }).show(); break; case R.id.btn_dialog3: String[] array2 = new String[]{"男","女"}; AlertDialog.Builder builder3 = new AlertDialog.Builder(DialogActivity.this); builder3.setTitle("选择性别").setSingleChoiceItems(array2, 0, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(DialogActivity.this, array2[which]+"", Toast.LENGTH_SHORT).show(); dialog.dismiss(); //选中其中任何一项后，对话框消失 } }).setCancelable(false).show(); //setCancelable 如果没有选择任何一项，点击阴影部分，对话框不会消失 break; case R.id.btn_dialog4: String[] array1 = new String[]{"读书","运动","旅游","写代码"}; boolean[] isChecked = new boolean[]{true,false,false,false,false}; AlertDialog.Builder builder2 = new AlertDialog.Builder(DialogActivity.this); builder2.setTitle("选择兴趣").setMultiChoiceItems(array1, isChecked, new DialogInterface.OnMultiChoiceClickListener() { @Override public void onClick(DialogInterface dialog, int which, boolean isChecked) { Toast.makeText(DialogActivity.this, array1[which]+":"+isChecked, Toast.LENGTH_SHORT).show(); } }).setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }).setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }).show(); break; case R.id.btn_dialog5: AlertDialog.Builder builder5 = new AlertDialog.Builder(DialogActivity.this); View view = LayoutInflater.from(this).inflate(R.layout.layout_dialog, null); EditText editUserName = view.findViewById(R.id.et_username); EditText editPassword = view.findViewById(R.id.et_password); Button button = view.findViewById(R.id.btn_login); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(DialogActivity.this, "用户名："+editUserName.getText().toString()+",密码："+editPassword.getText().toString(), Toast.LENGTH_SHORT).show(); } }); builder5.setTitle("请先登录！").setView(view) .show(); break; default: break; } } }
效果图如图所示：
