自定义dialog

网上一些自定义的dialog许多有不能左右对齐等等问题

1定义一个空的dialog

public class BaseDialog extends Dialog {

    public BaseDialog(Context context) {
        super(context, R.style.BaseDialog);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setCanceledOnTouchOutside(true);
        Window dialogWindow = getWindow();
        dialogWindow.getDecorView().setPadding(0, 0, 0, 0);
        WindowManager.LayoutParams lp = dialogWindow.getAttributes();
        lp.x = 0;
        lp.y = 0;
        dialogWindow.setAttributes(lp);
        dialogWindow.setLayout(LayoutParams.MATCH_PARENT,
                LayoutParams.WRAP_CONTENT);
        dialogWindow.setGravity(Gravity.CENTER);
    }
}

<style name="BaseDialog" parent="@android:Theme.Dialog">
        <item name="android:windowFrame">@null</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="android:windowBackground">@drawable/bg_dialog_null</item>
    </style>

bg_dialog_null

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="" >

    <solid android:color="#00000000" />

</shape>

窗口背景设置成纯透明

2 使用时就可以加载自己的layout了

final BaseDialog dialog = new BaseDialog(BaseActivity.this);
        dialog.setContentView(R.layout.dialog_update_unwanted);
        dialog.findViewById(R.id.dialog_update_unwanted_tv_confirm).setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });
        TextView tv = (TextView) dialog.findViewById(R.id.dialog_update_unwanted_tv_info);
        tv.setText(sb);
        dialog.show();

补充，要用Dialog的话

dialog.getWindow().getDecorView().setPadding(0, 0, 0, 0);

可以解决不能拉伸到边的问题