public class MainActivity extends Activity { protected int i; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } /* * 文本对话框:有自己的固定布局/点击外部默认就可以关闭对话框/取消按钮,如果不执行逻辑操作,监听事件可以直接写成null */ public void showText(View view) { // 1.创建AlertDialog的构造器对象 Builder builder = new AlertDialog.Builder(MainActivity.this); // 2.设置对话框的内容 builder.setTitle("提示框");//标题 builder.setIcon(R.drawable.ic_launcher);//图标 builder.setMessage("一个简单的提示框");//内容 // 设置确定(积极)按钮 builder.setPositiveButton("确定", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // 点击监听执行的逻辑操作 Toast.makeText(MainActivity.this, "点击了确定按钮", 0).show(); } }); // 设置取消(消极)按钮 builder.setNegativeButton("取消", null); // 3.显示对话框 builder.show(); } /* * 弹出单选对话框: */ public void showSingle(View view) { Builder builder = new AlertDialog.Builder(MainActivity.this); builder.setTitle("请选择性别");//标题 builder.setIcon(R.drawable.ic_launcher);//图标 /** * items:所有选项----数组 checkedItem :默认选中的条目的下标 listener:监听事件 */ final String[] items={"男","女","人妖"}; builder.setSingleChoiceItems(items, 2, new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { i=which; } }); builder.setPositiveButton("确定", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(MainActivity.this, "选择了:" + items[i], 0).show(); } }); builder.show(); } /* * 多选对话框 */ public void showMore(View view) { Builder builder = new AlertDialog.Builder(MainActivity.this); builder.setTitle("请选择爱好");//标题 /** * items:展示的数据的数组 * checkedItems:默认选中状态的数组 * listener:监听事件 */ final String[] items={"足球","篮球","乒乓球","羽毛球","玻璃球"}; final boolean[] checkedItems={true,false,false,false,false}; builder.setMultiChoiceItems(items, checkedItems, new OnMultiChoiceClickListener() { @Override public void onClick(DialogInterface dialog, int which, boolean isChecked) { //虽然没做任何逻辑操作,,,但是由于这个监听的存在,,,可以更改设置好的默认状态值 } }); builder.setPositiveButton("确定", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //遍历状态得到选中的下标,进行取值 for (int i = 0; i < checkedItems.length; i++) { if (checkedItems[i]) {//选中 Toast.makeText(MainActivity.this, "爱好是:"+items[i], 0).show(); } } } }); builder.show(); } /* * 弹出自定义的对话框:自定义的是自己布局/必须通过本身的视图对象去找控件/如果想要显示,是使用dialog.show()/手动关闭的方法 dialog.dismiss(); */ public void showMine(View view){ //1.创建构造器对象 Builder builder = new AlertDialog.Builder(MainActivity.this); //2.通过构造器对象,,,创建出来一个AlertDialog的对象 final AlertDialog dialog = builder.create(); //3.通过AlertDialog的对象,,,去设置自己的布局(视图对象) View contentView=View.inflate(MainActivity.this, R.layout.dialog_layout, null); dialog.setView(contentView); //4.可以执行逻辑操作,,,按钮的监听,,,找控件还是必须通过,视图对象去找 Button btn = (Button) contentView.findViewById(R.id.btn); final EditText edit_text = (EditText) contentView.findViewById(R.id.edit_text); btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.this, edit_text.getText().toString(), 0).show(); //在自定义对话框中,,,可以进行手动的关闭对话框 dialog.dismiss(); } }); //5.显示对话框 dialog.show(); } public void show_window(View view) { View view2=View.inflate(MainActivity.this, R.layout.activity_main, null); View contentView=View.inflate(MainActivity.this, R.layout.pop_layout, null); final PopupWindow window = new PopupWindow(contentView, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT); window.setBackgroundDrawable(new BitmapDrawable()); window.setOutsideTouchable(true); window.setFocusable(true); window.setTouchable(true); Button btn1 = (Button) contentView.findViewById(R.id.btn1); final EditText edit_text1 = (EditText) contentView.findViewById(R.id.edit_text1); btn1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.this, edit_text1.getText().toString(), 0).show(); window.dismiss(); } }); window.showAtLocation(view2, Gravity.BOTTOM, 0, 0); } }
AlertDialog的基础实现
猜你喜欢
转载自blog.csdn.net/qq_41673194/article/details/80014943
今日推荐
周排行