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android之自定义Dialog

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android中常用的一个就是弹框，比如微信添加图片低栏会弹框一个选择相机，照片，取消三个按钮！最近medical的项目中使用到了。分享下心得！

自定义Dialog

自定义Dialog的创建

  1. 定义控件，
  2. onCreate()加载视图view
  3. 设置控件的监听事件
  4. 设置一个内部接口，定义抽象监听方法
  5. 构造方法回调listener

ChooseDialog.java

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import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class ChooseDialog extends Dialog implements OnClickListener{

    private Button btn_take_photo;
    private Button btn_pick_photo;
    private Button btn_pick_cancel;
    private ChooserDialogListener listener;    

     public interface ChooserDialogListener{   
         public void onChoose(View view);   
     }   

     public ChooseDialog(Context context,int theme,ChooserDialogListener listener) {   
         super(context,theme);  
         this.listener = listener;
     }   

     @Override   
     protected void onCreate(Bundle savedInstanceState) {   
         super.onCreate(savedInstanceState);   
         setContentView(R.layout.imgchooser_dialog);   
         initViews();   
     }   

     private void initViews(){   
        btn_take_photo = (Button)findViewById(R.id.btn_take_photo);   
        btn_pick_photo = (Button)findViewById(R.id.btn_pick_photo);   
        btn_pick_cancel = (Button)findViewById(R.id.btn_pick_cancel);   

        btn_take_photo.setOnClickListener(this);   
        btn_pick_photo.setOnClickListener(this);   
        btn_pick_cancel.setOnClickListener(this);   
     }   

     @Override   
     public void onClick(View v) {
         listener.onChoose(v);
         this.dismiss();
     }   
}

Dialog调用

  1. 直接使用,初始化之后，dialog.show();
  2. DialogFragment中onCreateDialog(Bundle savedInstanceState)返回

源代码:DialogFragment.java

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public Dialog onCreateDialog(Bundle savedInstanceState)
    {

        ChooseDialog  dialog = new ChooseDialog(getActivity(),R.style.ActionTheme,   
                 new ChooserDialogListener() {   
             @Override   
             public void onChoose(View view) {
                 switch(view.getId()){
                     case R.id.btn_take_photo:
                         ((MainActivity)getActivity()).takeCamera();
                         break;   
                     case R.id.btn_pick_photo:
                         ((MainActivity)getActivity()).takePhoto();
                         break;   
                     case R.id.btn_pick_cancel:
                         Log.i("Target", "取消");
                         break;   
                 }
                 //TODO 分析图片
             }   
     });  

    dialog.setCanceledOnTouchOutside(true);

    Window window = dialog.getWindow();
    //dialog全屏
    window.getDecorView().setPadding(0, 0, 0, 0);
    WindowManager.LayoutParams lp = window.getAttributes();
    lp.width = WindowManager.LayoutParams.MATCH_PARENT;
    lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
    window.setAttributes(lp);
    //dialog显示在底层
    window.setGravity(Gravity.BOTTOM);
    window.setWindowAnimations(R.style.mystyle);
    //直接调用的话
    //dialog.show();
    return dialog;
    }

AlertDialog简单示例

介绍：alert上有两个Numberpicker，一个Numberpicker为整数，一个Numberpicker表示小数点后一位。
通过AlertDialog.Builder去直接生成一个builder.create()生成一个Dialog,可以自己参看android源码

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public class MyDialogFragment extends DialogFragment implements OnValueChangeListener
{

    private NumberPicker np_integer;
    private NumberPicker np_decimal;

    public interface LoginInputListener
    {
        void onLoginInputComplete(float result);
    }

    ...

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState)
    {
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        // Get the layout inflater
        LayoutInflater inflater = getActivity().getLayoutInflater();
        View view = inflater.inflate(R.layout.dialog, null);
        np_integer = (NumberPicker) view.findViewById(R.id.np_integer);
        np_integer.setMinValue(0);
        np_integer.setMaxValue(999);
        np_integer.setOnValueChangedListener(this);
        np_decimal = (NumberPicker) view.findViewById(R.id.np_decimal);
        np_decimal.setMinValue(0);
        np_decimal.setMaxValue(9);
        np_decimal.setOnValueChangedListener(this);
        builder.setView(view)
                .setTitle("PLEASE INPUT AND SAVE")
                // Add action buttons
                .setPositiveButton("Confirm",
                        new DialogInterface.OnClickListener()
                        {
                            @Override
                            public void onClick(DialogInterface dialog, int id)
                            {
                                Log.i("Target", getTargetFragment().getClass().getName());
                                LoginInputListener listener = (LoginInputListener) getTargetFragment();
                                float result= np_integer.getValue() + np_decimal.getValue()*1.0f/10;
                                listener.onLoginInputComplete(result);
                            }
                        }).setNegativeButton("Cancel", null);
        return builder.create();
    }

    ...

    @Override
    onValueChange //不写了

}

和Dialog一样 如果需要传值，它的调用处，去实现接口LoginInputListener,就可以先显示出来。
android传值，之前有写过一篇！传值其实都是类似，内部类，内部接口，似有变量设置getter,setter