Android将Widget添加到自己的应用程序

Widget添加方法：长安桌面-弹出Widget列表-选择之即添加到桌面，下面就实现了一个支持添加到自己应用程序的功能，废话不多说，直接上代码

1、通过继承ViewGroup来实现一个能添加Widget的控件

view plaincopy
to clipboardprint?

<span style="font-size:18px;">package cn.winplus.w2h;

import android.content.Context;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;

public class WidgetLayout extends ViewGroup {

// 存放touch的坐标
private int[] cellInfo = new int[2];
private OnLongClickListener mClickListener;

public WidgetLayout(Context context) {
super(context);

mClickListener = new OnLongClickListener() {

@Override
public boolean onLongClick(View arg0) {

return false;
}
};

}

public void addInScreen(View child, int width, int height) {
LayoutParams lp = new LayoutParams(width, height);
lp.x = cellInfo[0];
lp.y = cellInfo[1];
child.setOnLongClickListener(mClickListener);
addView(child, lp);
}

@Override
protected void onLayout(boolean arg0, int arg1, int arg2, int arg3, int arg4) {
LayoutParams lParams;
for (int i = 0; i < getChildCount(); i++) {
lParams = (LayoutParams) getChildAt(i).getLayoutParams();
getChildAt(i).layout(lParams.x, lParams.y,
lParams.x + lParams.width, lParams.y + lParams.height);
}
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);

LayoutParams lParams;
for (int i = 0; i < getChildCount(); i++) {
lParams = (LayoutParams) getChildAt(i).getLayoutParams();
getChildAt(i).measure(
MeasureSpec.makeMeasureSpec(MeasureSpec.EXACTLY,lParams.width),
MeasureSpec.makeMeasureSpec(MeasureSpec.EXACTLY,lParams.height));
}
}

@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
cellInfo[0] = (int) ev.getX();
cellInfo[1] = (int) ev.getY();
return super.dispatchTouchEvent(ev);
}

private class LayoutParams extends ViewGroup.LayoutParams {

int x;
int y;

public LayoutParams(int arg0, int arg1) {
super(arg0, arg1);
}

}

}</span>

view plaincopy
to clipboardprint?

<span style="font-size:18px;">package cn.winplus.w2h;

import android.app.Activity;

import android.appwidget.AppWidgetHost;

import android.appwidget.AppWidgetManager;

import android.appwidget.AppWidgetProviderInfo;

import android.content.Context;

import android.content.Intent;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.view.View.OnLongClickListener;

public class Widget2HomeActivity extends Activity implements OnLongClickListener{

private static final String TAG = "Widget2HomeActivity";

private AppWidgetHost mAppWidgetHost;

private AppWidgetManager mAppWidgetManager;

private WidgetLayout mWidgetLayout;

private Context context;

private static final int APPWIDGET_HOST_ID = 0x100;

private static final int REQUEST_PICK_APPWIDGET = 0;

private static final int REQUEST_CREATE_APPWIDGET = 1;

private static final String EXTRA_CUSTOM_WIDGET = "custom_widget";

@Override
public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

context = getApplicationContext();

mAppWidgetManager = AppWidgetManager.getInstance(context);

mAppWidgetHost = new AppWidgetHost(context, APPWIDGET_HOST_ID);

mAppWidgetHost.startListening();

mWidgetLayout = new WidgetLayout(this);

mWidgetLayout.setOnLongClickListener(this);

setContentView(mWidgetLayout);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {

super.onActivityResult(requestCode, resultCode, data);

if (resultCode == RESULT_OK) {

switch (requestCode) {

case REQUEST_PICK_APPWIDGET:

addAppWidget(data);
break;

case REQUEST_CREATE_APPWIDGET:

completeAddAppWidget(data);
break;

}
} else if (requestCode == REQUEST_PICK_APPWIDGET

&& resultCode == RESULT_CANCELED && data != null) {

int appWidgetId = data.getIntExtra(

AppWidgetManager.EXTRA_APPWIDGET_ID, -1);

if (appWidgetId != -1) {

mAppWidgetHost.deleteAppWidgetId(appWidgetId);

}
}
}

private void addAppWidget(Intent data) {

int appWidgetId = data.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,-1);

String customWidget = data.getStringExtra(EXTRA_CUSTOM_WIDGET);

if ("search_widget".equals(customWidget)) {

mAppWidgetHost.deleteAppWidgetId(appWidgetId);
} else {

AppWidgetProviderInfo appWidget = mAppWidgetManager

.getAppWidgetInfo(appWidgetId);

Log.d("addAppWidget", "configure:" + appWidget.configure);

if (appWidget.configure != null) {

// 弹出配置界面

Intent intent = new Intent(

AppWidgetManager.ACTION_APPWIDGET_CONFIGURE);

intent.setComponent(appWidget.configure);
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,

appWidgetId);

startActivityForResult(intent, REQUEST_CREATE_APPWIDGET);

} else {

// 直接添加到界面

onActivityResult(REQUEST_CREATE_APPWIDGET, Activity.RESULT_OK,

data);
}
}
}

/**
* 添加widget
*
* @param data
*/
private void completeAddAppWidget(Intent data) {

Bundle extras = data.getExtras();
int appWidgetId = extras

.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);

AppWidgetProviderInfo appWidgetInfo = mAppWidgetManager

.getAppWidgetInfo(appWidgetId);

View hostView = mAppWidgetHost.createView(this, appWidgetId,

appWidgetInfo);

mWidgetLayout.addInScreen(hostView, appWidgetInfo.minWidth,

appWidgetInfo.minHeight);
}

@Override

protected void onDestroy() {

try {

mAppWidgetHost.stopListening();
} catch (NullPointerException ex) {

Log.i(TAG, "problem while stopping AppWidgetHost during Launcher destruction", ex);

}
super.onDestroy();

}

@Override

public boolean onLongClick(View v) {

Intent pickIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK);

pickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetHost.allocateAppWidgetId());

// start the pick activity

startActivityForResult(pickIntent, REQUEST_PICK_APPWIDGET);

return false;

}
}</span>

<span style="font-size:18px;">package cn.winplus.w2h;

import android.app.Activity;
import android.appwidget.AppWidgetHost;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProviderInfo;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnLongClickListener;

public class Widget2HomeActivity extends Activity implements OnLongClickListener{

private static final String TAG = "Widget2HomeActivity";

private AppWidgetHost mAppWidgetHost;
private AppWidgetManager mAppWidgetManager;
private WidgetLayout mWidgetLayout;
private Context context;
private static final int APPWIDGET_HOST_ID = 0x100;
private static final int REQUEST_PICK_APPWIDGET = 0;
private static final int REQUEST_CREATE_APPWIDGET = 1;
private static final String EXTRA_CUSTOM_WIDGET = "custom_widget";

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

context = getApplicationContext();

mAppWidgetManager = AppWidgetManager.getInstance(context);
mAppWidgetHost = new AppWidgetHost(context, APPWIDGET_HOST_ID);
mAppWidgetHost.startListening();

mWidgetLayout = new WidgetLayout(this);

mWidgetLayout.setOnLongClickListener(this);
setContentView(mWidgetLayout);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {

super.onActivityResult(requestCode, resultCode, data);

if (resultCode == RESULT_OK) {
switch (requestCode) {
case REQUEST_PICK_APPWIDGET:
addAppWidget(data);
break;
case REQUEST_CREATE_APPWIDGET:
completeAddAppWidget(data);
break;
}
} else if (requestCode == REQUEST_PICK_APPWIDGET
&& resultCode == RESULT_CANCELED && data != null) {
int appWidgetId = data.getIntExtra(
AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
if (appWidgetId != -1) {
mAppWidgetHost.deleteAppWidgetId(appWidgetId);
}
}
}

private void addAppWidget(Intent data) {
int appWidgetId = data.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,-1);
String customWidget = data.getStringExtra(EXTRA_CUSTOM_WIDGET);
if ("search_widget".equals(customWidget)) {
mAppWidgetHost.deleteAppWidgetId(appWidgetId);
} else {
AppWidgetProviderInfo appWidget = mAppWidgetManager
.getAppWidgetInfo(appWidgetId);

Log.d("addAppWidget", "configure:" + appWidget.configure);
if (appWidget.configure != null) {
// 弹出配置界面
Intent intent = new Intent(
AppWidgetManager.ACTION_APPWIDGET_CONFIGURE);
intent.setComponent(appWidget.configure);
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
appWidgetId);

startActivityForResult(intent, REQUEST_CREATE_APPWIDGET);
} else {
// 直接添加到界面
onActivityResult(REQUEST_CREATE_APPWIDGET, Activity.RESULT_OK,
data);
}
}
}

/**
* 添加widget
*
* @param data
*/
private void completeAddAppWidget(Intent data) {
Bundle extras = data.getExtras();
int appWidgetId = extras
.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);

AppWidgetProviderInfo appWidgetInfo = mAppWidgetManager
.getAppWidgetInfo(appWidgetId);

View hostView = mAppWidgetHost.createView(this, appWidgetId,
appWidgetInfo);

mWidgetLayout.addInScreen(hostView, appWidgetInfo.minWidth,
appWidgetInfo.minHeight);
}

@Override
protected void onDestroy() {
try {
mAppWidgetHost.stopListening();
} catch (NullPointerException ex) {
Log.i(TAG, "problem while stopping AppWidgetHost during Launcher destruction", ex);
}
super.onDestroy();
}

@Override
public boolean onLongClick(View v) {
Intent pickIntent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK);
pickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetHost.allocateAppWidgetId());
// start the pick activity
startActivityForResult(pickIntent, REQUEST_PICK_APPWIDGET);
return false;
}
}</span>

请看效果图：



转载请注明出处：/article/1411300.html