本篇常用的View如图中所示：
xml布局代码
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:text="@string/yiban_dialog"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="showYiban"/>
<Button
android:text="显示单选列表AlertDialog"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="showLiebiao"/>
<Button
android:text="显示自定义AlertDialog"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="showDingYi"/>
<Button
android:layout_marginTop="20dp"
android:text="显示圆形进度ProgressDialog"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="showYuanXing"/>
<Button
android:text="显示水平进度ProgressDialog"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="showShuiPing"/>
<Button
android:layout_marginTop="20dp"
android:text="显示DatePickerDialog"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="showDate"/>
<Button
android:text="显示TimerPickerDialog"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="showTime"/>
</LinearLayout>自定义dialog-xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="fitXY"
android:src="@drawable/title" />
<EditText
android:id="@+id/et_dialog_username"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入用户名" />
<EditText
android:id="@+id/et_dialog_pwd"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入密码"
android:inputType="textPassword" />
</LinearLayout>java代码
public class DialogActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dialog);
}
public void showYiban(View v) {
new AlertDialog.Builder(this)
.setTitle("删除数据")
.setPositiveButton("取消", (onClickDialogInterface, which) -> {
Toast.makeText(DialogActivity.this, "取消删除", Toast.LENGTH_SHORT).show();
})
.setNegativeButton("删除", (onClickDialogInterface, which) -> {
Toast.makeText(DialogActivity.this, "删除数据", Toast.LENGTH_SHORT).show();
})
.show();
}
private String choice;
public void showLiebiao(View v) {
final String[] color = {"红色", "绿色", "蓝色", "橙色"};
new AlertDialog.Builder(this)
.setTitle("选择背景颜色")
.setPositiveButton("取消", (dialog, which) -> {
Toast.makeText(DialogActivity.this, "您取消选择了" + choice, Toast.LENGTH_SHORT).show();
})
.setNegativeButton("确定", (dialog, which) -> {
Toast.makeText(DialogActivity.this, "您选择了" + choice, Toast.LENGTH_SHORT).show();
})
.setSingleChoiceItems(color, 0, (dialog, which) -> {
// dialog.dismiss();
choice = color[which];
})
.show();
}
public void showDingYi(View v) {
View view = View.inflate(this, R.layout.view_dialog, null);
final EditText et_dialog_username = view.findViewById(R.id.et_dialog_username);
final EditText et_dialog_pwd = view.findViewById(R.id.et_dialog_pwd);
new AlertDialog.Builder(this)
.setView(view)
.setPositiveButton("取消", (dialog, which) -> {
})
.setNegativeButton("确定", (dialog, which) -> {
final String username = et_dialog_username.getText().toString();
final String pwd = et_dialog_pwd.getText().toString();
Toast.makeText(DialogActivity.this, username + ":" + pwd, Toast.LENGTH_SHORT).show();
})
.show();
}
public void showYuanXing(View view) {
final ProgressDialog dialog = ProgressDialog.show(this, "数据下载", "数据下载中...");
new Thread(() -> {
for (int i = 0; i < 20; i++) {
try {
Thread.sleep(200);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
dialog.dismiss();
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(DialogActivity.this, "加载完成", Toast.LENGTH_SHORT).show();
}
});
}).start();
}
public void showShuiPing(View view) {
ProgressDialog pd = new ProgressDialog(this);
pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pd.show();
new Thread(new Runnable() {
@Override
public void run() {
int time = 100;
for (int i = 0; i < time; i++) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
pd.setProgress(pd.getProgress() + 1);
}
pd.dismiss();
}
}).start();
}
Calendar c = Calendar.getInstance();
public void showDate(View view) {
new DatePickerDialog(this, (datePicker, year, monthOfYear, dayOfMonth) -> {
Toast.makeText(DialogActivity.this, year + "-" + (monthOfYear + 1) + "-" + dayOfMonth, Toast.LENGTH_SHORT).show();
}, c.get(Calendar.YEAR), c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH)).show();
}
public void showTime(View view) {
new TimePickerDialog(this, (timePicker, hourOfDay, minute) -> {
Toast.makeText(DialogActivity.this, hourOfDay + ":" + minute, Toast.LENGTH_SHORT).show();
}, c.get(Calendar.HOUR_OF_DAY), c.get(Calendar.MINUTE), true).show();
}
}