自定义Dialog（二）之Dialog与Activity传值

之前发的那篇自定义Dialog似乎有点太含糊，Dialog的关系图甚至都没写，以及Dialog显示的时候Activity的生命周期是处于什么状态，Dialog如何向Activity传递值

1，Dialog的关系图

2，Dialog显示的时候Activity处于什么状态 ? Dialog显示的时候不会调用Activity的任何生命周期方法，上代码：

public class MainActivity extends Activity {
private CustomDialog mDialog;
private final String TAG = "MainActivity";
private Button mButton;

@Override
protected void onCreate(Bundle savedInstanceState) {
Log.e(TAG, "onCreate");
super.onCreate(savedInstanceState);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
setContentView(R.layout.activity_main);
mButton = (Button) findViewById(R.id.btn_start);
mDialog = new CustomDialog.Builder(this).setTitle("标题")
.setMessage("这是内容")
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dissmissDialog();
}
})
.setPositiveButton("确认", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dissmissDialog();
}
}).setCallBackListener(new DialogCallBackListener() {

@Override
public void callBack(String msg) {
if (!TextUtils.isEmpty(msg))
mButton.setText(msg);
}
}).build();
mDialog.getWindow().setWindowAnimations(R.style.Dialog_Anim_Style);

}

public void showDialog(View view) {
if (mDialog != null && !mDialog.isShowing())
mDialog.show();
}

public void dissmissDialog() {
if (mDialog != null && mDialog.isShowing())
mDialog.dismiss();
}

@Override
protected void onStart() {
super.onStart();
Log.e(TAG, "onStart");
}

@Override
protected void onResume() {
super.onResume();
Log.e(TAG, "onResume");
}

@Override
protected void onPause() {
super.onPause();
Log.e(TAG, "onPause");
}

@Override
protected void onStop() {
super.onStop();
Log.e(TAG, "onStop");
}

@Override
protected void onRestart() {
super.onRestart();
Log.e(TAG, "onRestart");
}

@Override
protected void onDestroy() {
super.onDestroy();
Log.e(TAG, "onDestory");
}
}

当Dialog显示的时候看logcat截图

此时手机的屏幕：

Dialog显示不会调用Activity的任何生命周期

3,Dialog如何向Activity传值：

我是通过接口，在操作Dialog的时候回调给调用者

演示流程：

在Dialog的内容区域放一个EdiitText,动态输入然后修改MainActivity，Button的值

流程：

(1),在我们Dialog里面定义一个接口

(2),当点击Dialog的确定按钮之后触发接口里面的方法

(3),MainActivity调用Dialog时，实现接口

public class CustomDialog extends Dialog {

public interface DialogCallBackListener{//通过该接口回调Dialog需要传递的值
public void callBack(String msg);//具体方法
}

public CustomDialog(Context context) {
super(context);
}

public CustomDialog(Context context, int themeResId) {
super(context, themeResId);
}

protected CustomDialog(Context context, boolean cancelable, OnCancelListener cancelListener) {
super(context, cancelable, cancelListener);
}

@Override
public void dismiss() {
super.dismiss();
}
//用Builder模式来构造Dialog
public static class Builder {
private Context mContext;
private View contentView;
private String title;
private String message;
private String positiveText;
private String negativeText;
private DialogInterface.OnClickListener positiviOnclickListener;
private DialogInterface.OnClickListener negativeOnclickListener;
private DialogCallBackListener mDialogCallBackListener;
public Builder(Context mContext) {
this.mContext = mContext;
}

public Builder setContentView(View contentView) {//设置dialog的主view
this.contentView = contentView;
return this;
}

public Builder setTitle(String title) {//设置dialog的标题
this.title = title;
return this;
}

public Builder setMessage(String msg) {//设置dialig的内容
this.message = msg;
return this;
}

public Builder setPositiveButton(String text, DialogInterface.OnClickListener positiviOnclickListener) {//dialog的确认按钮
this.positiveText = text;
this.positiviOnclickListener = positiviOnclickListener;
return this;
}

public Builder setNegativeButton(String text, DialogInterface.OnClickListener negativeOnclickListener) {//dialog的取消按钮
this.negativeText = text;
this.negativeOnclickListener = negativeOnclickListener;
return this;
}

public Builder setCallBackListener(DialogCallBackListener mDialogCallBackListener){//设置回调
this.mDialogCallBackListener = mDialogCallBackListener;
return this;
}
/**
* 1,加载要显示的布局
* 2，通过dialog的addContentView将布局添加到window中
* 3，基本逻辑处理
* 4，显示dialog的布局
*/
public CustomDialog build() {
LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final CustomDialog mCustomDialog = new CustomDialog(mContext, R.style.CustomDialog);//默认调用带style的构造
mCustomDialog.setCanceledOnTouchOutside(false);//默认点击布局外不能取消dialog
View view = mInflater.inflate(R.layout.custom_dialog, null);
mCustomDialog.addContentView(view, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
final TextView messageView = (TextView) view.findViewById(R.id.tv_message);;
if (!TextUtils.isEmpty(title)) {
TextView titleView = (TextView) view.findViewById(R.id.tv_title);
titleView.setText(title);
}
if (!TextUtils.isEmpty(message)) {
messageView.setHint(message);//显示的内容
} else if (contentView != null) {//如果内容区域要显示其他的View的话
LinearLayout mContentLayout = (LinearLayout) view.findViewById(R.id.content);
mContentLayout.removeAllViews();
mContentLayout.addView(contentView);
}

if (!TextUtils.isEmpty(positiveText)) {//这是确认按钮
Button btn_cofirm = (Button) view.findViewById(R.id.btn_confirm);
btn_cofirm.setText(positiveText);
if (positiviOnclickListener != null) {
btn_cofirm.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
positiviOnclickListener.onClick(mCustomDialog, BUTTON_POSITIVE);
if(mDialogCallBackListener != null )
mDialogCallBackListener.callBack(messageView.getText().toString());  //触发回调
}
});
}
} else {
view.findViewById(R.id.btn_confirm).setVisibility(View.GONE);
}

if (!TextUtils.isEmpty(negativeText)) {//这是取消按钮逻辑处理
Button btn_cancle = (Button) view.findViewById(R.id.btn_cancle);
btn_cancle.setText(negativeText);
if (negativeOnclickListener != null) {
btn_cancle.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
negativeOnclickListener.onClick(mCustomDialog, BUTTON_NEGATIVE);
}
});
}
} else {
view.findViewById(R.id.btn_cancle).setVisibility(View.GONE);
}

mCustomDialog.setContentView(view);
return mCustomDialog;
}

}

}

MainActivity调用代码

public class MainActivity extends Activity {
private CustomDialog mDialog;
private final String TAG = "MainActivity";
private Button mButton;

@Override
protected void onCreate(Bundle savedInstanceState) {
Log.e(TAG, "onCreate");
super.onCreate(savedInstanceState);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
setContentView(R.layout.activity_main);
mButton = (Button) findViewById(R.id.btn_start);
mDialog = new CustomDialog.Builder(this).setTitle("标题")
.setMessage("这是内容")
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dissmissDialog();
}
})
.setPositiveButton("确认", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dissmissDialog();
}
}).setCallBackListener(new DialogCallBackListener() {

@Override
public void callBack(String msg) {//具体接口的实现
if (!TextUtils.isEmpty(msg))
mButton.setText(msg);
}
}).build();

;
mDialog.getWindow().setWindowAnimations(R.style.Dialog_Anim_Style);

}

public void showDialog(View view) {
if (mDialog != null && !mDialog.isShowing())
mDialog.show();
}

public void dissmissDialog() {
if (mDialog != null && mDialog.isShowing())
mDialog.dismiss();
}
}

运行结果