DialogFragment和AlertDialog的使用
package com.example.fragments;
import java.lang.ref.WeakReference;
import java.lang.reflect.Field;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentManager;
/**
* <p>
* 关于DialogFragment的使用
* </p>
* 下午5:38:45
*
* @auther delvikCoder
*/
public class CustomFragment extends DialogFragment {
private static Context mContext;
private AlertDialog alertDialog;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
String str = getArguments().getString("title");
alertDialog = new AlertDialog.Builder(mContext,
AlertDialog.THEME_HOLO_LIGHT).setTitle(str)
.setMessage("这是个测试DialogFragment的列子")
.setPositiveButton("确定", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).setNegativeButton("取消", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).setCancelable(false)
.create();
setButtonUseless();
return alertDialog;
}
@Override
public void show(FragmentManager manager, String tag) {
super.show(manager, tag);
}
/**
* <p>
* 这里利用反射使我们的AlertDialog在没特定使其消失情况下，点击按钮不消失 具体看：<a
* href="http://blog.csdn.net/abby_dcy/article/details/6049535">看博客</a>
* </p>
* void
*/
public void setButtonUseless() {
Field field;
try {
field = alertDialog.getClass().getDeclaredField("mAlert");
field.setAccessible(true);
Object obj = field.get(alertDialog);
field = obj.getClass().getDeclaredField("mHandler");
field.setAccessible(true);
field.set(obj, new ButtonHandler(null));
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
private static final class ButtonHandler extends Handler {
// Button clicks have Message.what as the BUTTON{1,2,3} constant
private static final int MSG_DISMISS_DIALOG = 1;
private WeakReference<DialogInterface> mDialog;
public ButtonHandler(DialogInterface dialog) {
mDialog = new WeakReference<DialogInterface>(dialog);
}
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case DialogInterface.BUTTON_POSITIVE:
case DialogInterface.BUTTON_NEGATIVE:
case DialogInterface.BUTTON_NEUTRAL:
((DialogInterface.OnClickListener) msg.obj).onClick(
mDialog.get(), msg.what);
break;
// 下面这两句导致dialog消失
// case MSG_DISMISS_DIALOG:
// ((DialogInterface) msg.obj).dismiss();
}
}
}
/**
* <p>
* 标题
* </p>
*
* @param title
* @return Fragment
*/
public static CustomFragment getFragment(Context context, String title) {
mContext = context;
CustomFragment fragment = new CustomFragment();
Bundle b = new Bundle();
b.putString("title", title);
fragment.setArguments(b);
return fragment;
}
}
Button btn = (Button) findViewById(R.id.button1ss);
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
CustomFragment customFragment = (CustomFragment) CustomFragment
.getFragment(MainActivity.this,
"AlertDialog.THEME_HOLO_LIGHT");
customFragment.show(getSupportFragmentManager(), "");
}
});
然后看几个效果：下面分别对应AlertDialog中的几种Theme
THEME_DEVICE_DEFAULT_LIGHT，THEME_TRADITIONAL，THEME_DEVICE_DEFAULT_DARK，THEME_HOLO_LIGHT
默认AlertDialog不管点击那个按钮都会消失，设置AlertDialog不消失，而有时候我们不想 其消失：
/**
* <p>
* 这里利用反射使我们的AlertDialog在没特定使其消失情况下，点击按钮不消失 具体看：<a
* href="http://blog.csdn.net/abby_dcy/article/details/6049535">看博客</a>
* </p>
* void
*/
public void setButtonUseless() {
Field field;
try {
field = alertDialog.getClass().getDeclaredField("mAlert");
field.setAccessible(true);
Object obj = field.get(alertDialog);
field = obj.getClass().getDeclaredField("mHandler");
field.setAccessible(true);
field.set(obj, new ButtonHandler(null));
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
static int resolveDialogTheme(Context context, int resid) {
if (resid == THEME_TRADITIONAL) {
return com.android.internal.R.style.Theme_Dialog_Alert;
} else if (resid == THEME_HOLO_DARK) {
return com.android.internal.R.style.Theme_Holo_Dialog_Alert;
} else if (resid == THEME_HOLO_LIGHT) {
return com.android.internal.R.style.Theme_Holo_Light_Dialog_Alert;
} else if (resid == THEME_DEVICE_DEFAULT_DARK) {
return com.android.internal.R.style.Theme_DeviceDefault_Dialog_Alert;
} else if (resid == THEME_DEVICE_DEFAULT_LIGHT) {
return com.android.internal.R.style.Theme_DeviceDefault_Light_Dialog_Alert;
} else if (resid >= 0x01000000) { // start of real resource IDs.
return resid;
} else {
TypedValue outValue = new TypedValue();
context.getTheme().resolveAttribute(com.android.internal.R.attr.alertDialogTheme,
outValue, true);
return outValue.resourceId;
}
}
private AlertController mAlert;