android 自学笔记

今日学习了Android常用的控件

1. TextView

    <TextView
        android:id="@+id/text_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:textSize="24sp"
        android:textColor="#00ff00"
        android:text="This is TextView" />

2.Button

<Button 
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button" />

3.EditText

    <EditText 
        android:id="@+id/edit_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
		android:hint="Type something here"
		android:maxLines="2"
        />

4.ImageView

    <ImageView 
        android:id="@+id/image_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher"
        />

5.ProgressBar

        <ProgressBar 
        android:id="@+id/progress_bar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        style = "?android:attr/progressBarStyleHorizontal"
        android:max="100"
        />

6.AlertDialog

AlertDialog.Builder dialog = new AlertDialog.Builder(this);
			dialog.setTitle("This is Dialog");
			dialog.setMessage("Something important.");
			dialog.setCancelable(false);
			dialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {

				@Override
				public void onClick(DialogInterface dialog, int which) {
					// TODO 自动生成的方法存根

				}
			});

			dialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

				@Override
				public void onClick(DialogInterface arg0, int arg1) {
					// TODO 自动生成的方法存根

				}
			});
			dialog.show();
			

7.ProgressDialog

			ProgressDialog progressDialog = new ProgressDialog(this);
			progressDialog.setTitle("This is ProgressDialog");
			progressDialog.setMessage("Loading...");
			progressDialog.setCancelable(true);
			progressDialog.show();

常用属性可查。