内容提供器 – 微风的网络日志

代码与范例：

import android.app.Activity;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.text.format.DateUtils;
import android.widget.TextView;

public class CalendarTestActivity extends Activity {
	private TextView tv;// 用于屏幕文字显示的TextView
	private String temp;// 用以记录TextView的文本内容
	public String AUTHORITY;// 用以适应不同的Android系统版本下日历的内容提供器Uri的不同

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		final int sdkVersion = Build.VERSION.SDK_INT; //获取设备的Android系统版本号
		// 8=Build.VERSION_CODES.FROYO
		if (sdkVersion < 8) { //Android从版本2.2起Calendar的Uri发生了变化，必须注意
			AUTHORITY = "calendar";
		} else {
			AUTHORITY = "com.android.calendar";
		}
		temp = "";

		Cursor cursor = getContentResolver().query(Uri.parse("content://" + AUTHORITY + "/calendars"), new String[] { "_id", "displayName" }, "selected=1", null, null);
		if (cursor != null && cursor.moveToFirst()) {
			String[] calNames = new String[cursor.getCount()];
			int[] calIds = new int[cursor.getCount()];
			for (int i = 0; i < calNames.length; i++) {
				calIds[i] = cursor.getInt(0);
				calNames[i] = cursor.getString(1);
				//将获取的日历名称信息加入字符串变量temp
				temp += Integer.toString(calIds[i]); 
				temp += "  ";
				temp += calNames[i];
				temp += "\n";
				cursor.moveToNext();
			}
			cursor.close();
			if (calIds.length > 0) {
				//可以在此进行操作
			}
		}

		tv = (TextView) findViewById(R.id.con);
		tv.setText(temp);

	}

	//添加日历项目
	public void insert(int calIDs) {
		int cal_id = calIDs;

		ContentValues cv = new ContentValues();
		cv.put("calendar_id", cal_id);
		cv.put("title", "Judy's birthday");
		cv.put("description", "Time to celebrate Judy's birthday.");
		cv.put("eventLocation", "KFC, SH");
		cv.put("dtstart", System.currentTimeMillis());
		cv.put("dtend", System.currentTimeMillis() + DateUtils.DAY_IN_MILLIS);
		cv.put("allDay", 1);
		cv.put("hasAlarm", 1);
		getContentResolver().insert(Uri.parse("content://" + AUTHORITY + "/events"), cv);
	}
}

import android.app.Activity;

import android.content.ContentValues;

import android.database.Cursor;

import android.net.Uri;

import android.os.Build;

import android.os.Bundle;

import android.text.format.DateUtils;

import android.widget.TextView;

public class CalendarTestActivity extends Activity {

private TextView tv;// 用于屏幕文字显示的TextView

private String temp;// 用以记录TextView的文本内容

public String AUTHORITY;// 用以适应不同的Android系统版本下日历的内容提供器Uri的不同

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

final int sdkVersion = Build.VERSION.SDK_INT; //获取设备的Android系统版本号

// 8=Build.VERSION_CODES.FROYO

if (sdkVersion < 8) { //Android从版本2.2起Calendar的Uri发生了变化，必须注意

AUTHORITY = "calendar";

} else {

AUTHORITY = "com.android.calendar";

}

temp = "";

Cursor cursor = getContentResolver().query(Uri.parse("content://" + AUTHORITY + "/calendars"), new String[] { "_id", "displayName" }, "selected=1", null, null);

if (cursor != null && cursor.moveToFirst()) {

String[] calNames = new String[cursor.getCount()];

int[] calIds = new int[cursor.getCount()];

for (int i = 0; i < calNames.length; i++) {

calIds[i] = cursor.getInt(0);

calNames[i] = cursor.getString(1);

//将获取的日历名称信息加入字符串变量temp

temp += Integer.toString(calIds[i]);

temp += " ";

temp += calNames[i];

temp += "\n";

cursor.moveToNext();

}

cursor.close();

if (calIds.length > 0) {

//可以在此进行操作

}

tv = (TextView) findViewById(R.id.con);

tv.setText(temp);

}

//添加日历项目

public void insert(int calIDs) {

int cal_id = calIDs;

ContentValues cv = new ContentValues();

cv.put("calendar_id", cal_id);

cv.put("title", "Judy's birthday");

cv.put("description", "Time to celebrate Judy's birthday.");

cv.put("eventLocation", "KFC, SH");

cv.put("dtstart", System.currentTimeMillis());

cv.put("dtend", System.currentTimeMillis() + DateUtils.DAY_IN_MILLIS);

cv.put("allDay", 1);

cv.put("hasAlarm", 1);

getContentResolver().insert(Uri.parse("content://" + AUTHORITY + "/events"), cv);

}

说明：Android中内容提供器（ContentProvider）有着广泛的应用，Google账户同步的日历也将数据储存在相应的内容提供器中。这里是日历内容提供器的一个简单范例，可以获取日历的名称，并提供了一个添加日历项目的方法。

标签：内容提供器

Android中获取设备Google日历（Google Calendar）信息