android中设置AlertDialog的大小 .



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AlertDialog dialog = builder.setTitle("消息列表") .setView(layout) .create(); dialog.show(); //设置窗口的大小 dialog.getWindow().setLayout(300, 200);

AlertDialog dialog = builder.setTitle("消息列表")
.setView(layout)
.create();
dialog.show();
//设置窗口的大小
dialog.getWindow().setLayout(300, 200);

dialog.show();一定要放在dialog.getWindow().setLayout(300, 200);的前面，否则不起作用。
网上有一种方法是

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WindowManager.LayoutParams params = dialog.getWindow().getAttributes(); params.width = 300; params.height = 200; dialog.getWindow().setAttributes(params);

WindowManager.LayoutParams params = dialog.getWindow().getAttributes();
params.width = 300;
params.height = 200;
dialog.getWindow().setAttributes(params);

但是dialog.getWindow().setLayout(300, 200);实际上封装了这个方法，setLayout()的源代码如下：

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final WindowManager.LayoutParams attrs = getAttributes(); attrs.width = width; attrs.height = height; if (mCallback != null) { mCallback.onWindowAttributesChanged(attrs); }

final WindowManager.LayoutParams attrs = getAttributes();
attrs.width = width;
attrs.height = height;
if (mCallback != null) {
mCallback.onWindowAttributesChanged(attrs);
}

所以这两个方法的作用本质上是一样的，都是为AlertDialog设置大小