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在Android开发中,Toast是一种简单的弹出提示,用于向用户显示临时的消息。下面是五种情形的Toast使用示例:
- 普通Toast:
Toast.makeText(getApplicationContext(), "普通Toast", Toast.LENGTH_SHORT).show();
- 带有图标的Toast:
Toast toast = Toast.makeText(getApplicationContext(), "带有图标的Toast", Toast.LENGTH_SHORT); toast.setGravity(Gravity.CENTER, 0, 0); LinearLayout toastLayout = (LinearLayout) toast.getView(); ImageView imageView = new ImageView(getApplicationContext()); imageView.setImageResource(R.drawable.ic_icon); toastLayout.addView(imageView, 0); toast.show();
- 自定义布局的Toast:
首先,创建一个自定义的布局文件toast_custom.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#000000" android:gravity="center" android:orientation="horizontal" android:padding="20dp"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_icon" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="#FFFFFF" android:text="自定义布局的Toast" /> </LinearLayout>
然后,在代码中使用自定义布局的Toast:
LayoutInflater inflater = getLayoutInflater(); View layout = inflater.inflate(R.layout.toast_custom, (ViewGroup) findViewById(R.id.toast_custom_layout)); Toast toast = new Toast(getApplicationContext()); toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0); toast.setDuration(Toast.LENGTH_SHORT); toast.setView(layout); toast.show();
- 长时间显示的Toast:
Toast.makeText(getApplicationContext(), "长时间显示的Toast", Toast.LENGTH_LONG).show();
- 位置偏移的Toast:
Toast toast = Toast.makeText(getApplicationContext(), "位置偏移的Toast", Toast.LENGTH_SHORT); toast.setGravity(Gravity.TOP|Gravity.LEFT, 100, 100); toast.show();
除了以上的五种情形,你还可以根据自己的需求进行更多的扩展和定制,例如改变Toast的字体样式、背景颜色等。通过自定义Toast,你可以根据自己的喜好和应用的风格创建属于自己的Toast。