Android DialogFragment在项目中的基本使用

app打开dialogFragment后 statusbar颜色会不对。正好来复习下DialogFragment的使用，以巩固下基础

问题.png

测试了一下发现，我需要对话框宽度全屏，并且保持在底部。果然问题出现在全屏这里，如果view的宽高全是match_parent，对话框内容后的背景色就会消失

@Override
    public void onStart() {
        super.onStart();
        Dialog dialog = getDialog();
        if (dialog != null )
        {
           //如果宽高都为MATCH_PARENT,内容外的背景色就会失效，所以只设置宽全屏
            int width = ViewGroup.LayoutParams.MATCH_PARENT;
            int height = ViewGroup.LayoutParams.WRAP_CONTENT;
            dialog.getWindow().setLayout(width, height);//全屏
            dialog.getWindow().setGravity(Gravity.BOTTOM);//内容设置在底部
            //内容的背景色.系统的内容宽度是不全屏的，替换为自己的后宽度可以全屏
            dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        }
    }

测试DialogFragment类

/**
 * 内容居下，宽度填满屏幕的dialogFragment
 * Created by Li on 2017/8/3.
 */
public class TestDialog extends DialogFragment {

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //DialogFragment.STYLE_NO_FRAME 没有边框，
        //R.style.dialogTheme 主要就是设置对话框内容区域外的背景色，
        setStyle(DialogFragment.STYLE_NO_FRAME,R.style.dialogTheme);
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.dialog_test,container,false);
        return view;
    }

    @Override
    public void onStart() {
        super.onStart();
        Dialog dialog = getDialog();
        if (dialog != null )
        {
           //如果宽高都为MATCH_PARENT,内容外的背景色就会失效，所以只设置宽全屏
            int width = ViewGroup.LayoutParams.MATCH_PARENT;
            int height = ViewGroup.LayoutParams.WRAP_CONTENT;
            dialog.getWindow().setLayout(width, height);//全屏
            dialog.getWindow().setGravity(Gravity.BOTTOM);//内容设置在底部
            //内容的背景色.对于全屏很重要，系统的内容宽度是不全屏的，替换为自己的后宽度可以全屏
            dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        }
    }
}

再看下style

使用就很简单了

TestDialog dialog = new TestDialog();
dialog.show(getSupportFragmentManager(),"test");

再复习下最简单的AlertDialog

public class TestAlertDialog extends DialogFragment {

    public static TestAlertDialog newInstance(String title ,String msg) {
        TestAlertDialog frag = new TestAlertDialog();
        Bundle args = new Bundle();
        args.putString("title", title);
        args.putString("msg", msg);
        frag.setArguments(args);
        return frag;
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        String title = getArguments().getString("title");
        String msg = getArguments().getString("msg");

        return new AlertDialog.Builder(getActivity())
                .setTitle(title)
                .setMessage(msg)
                .setPositiveButton(android.R.string.ok,
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {
                                Toast.makeText(getActivity(),"你点击了确认",Toast.LENGTH_LONG).show();
                            }
                        }
                )
                .setNegativeButton(android.R.string.cancel,
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {
                                Toast.makeText(getActivity(),"你点击了取消",Toast.LENGTH_LONG).show();
                            }
                        }
                )
                .create();
    }
}

alertDialog.png

这里按钮的颜色是通过colorAccent控制的

accentColor.png