演示Android百度地圖操作功能
在本文中將演示百度地圖的操作功能，包括縮放，旋轉，視角切換，點擊，雙擊，長按事件觸發的操作以及截圖等。百度地圖本來就內置有縮放，旋轉功能，那么在這里，截圖（其實很多手機也自帶截圖功能）以及點擊事件的監聽算是比較有實際意義的功能。代碼原型來源百度demo：
Activity：
package com.home;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import com.baidu.mapapi.BMapManager;
import com.baidu.mapapi.map.MKMapTouchListener;
import com.baidu.mapapi.map.MKMapViewListener;
import com.baidu.mapapi.map.MapController;
import com.baidu.mapapi.map.MapPoi;
import com.baidu.mapapi.map.MapView;
import com.baidu.platform.comapi.basestruct.GeoPoint;
import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class ControlBMapActivity extends Activity {
/**
* MapView 是地圖主控件
*/
private MapView mMapView = null;
/**
* 用MapController完成地圖控制
*/
private MapController mMapController = null;
/**
* MKMapViewListener 用于處理地圖事件回調
*/
MKMapViewListener mMapListener = null;
/**
* 用于截獲屏坐標
*/
MKMapTouchListener mapTouchListener = null;
/**
* 當前地點擊點
*/
private GeoPoint currentPt = null;
/**
* 控制按鈕
*/
private Button zoomButton = null;
private Button rotateButton = null;
private Button overlookButton = null;
private Button saveScreenButton = null;
private String touchType = null;
/**
* 用于顯示地圖狀態的面板
*/
private TextView mStateTextView = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
DemoApplication app = (DemoApplication) this.getApplication();
if (app.mBMapManager == null) {
app.mBMapManager = new BMapManager(this);
/**
* 如果BMapManager沒有初始化則初始化BMapManager
*/
app.mBMapManager.init(DemoApplication.strKey,
new DemoApplication.MyGeneralListener());
}
setContentView(R.layout.control_main);
mMapView = (MapView) findViewById(R.id.bmapView);
/**
* 獲取地圖控制器
*/
mMapController = mMapView.getController();
/**
* 設置地圖是否響應點擊事件 .
*/
mMapController.enableClick(true);
/**
* 設置地圖縮放級別
*/
mMapController.setZoom(12);
mStateTextView = (TextView) findViewById(R.id.state);
/**
* 初始化地圖事件監聽
*/
initListener();
/**
* 將地圖默認移動至天安門
*/
double cLat = 39.945;
double cLon = 116.404;
GeoPoint p = new GeoPoint((int) (cLat * 1E6), (int) (cLon * 1E6));
mMapController.setCenter(p);
}
private void initListener() {
/**
* 設置地圖點擊事件監聽
*/
mapTouchListener = new MKMapTouchListener() {
@Override
public void onMapClick(GeoPoint point) {
touchType = "單擊";
currentPt = point;
updateMapState();
}
@Override
public void onMapDoubleClick(GeoPoint point) {
touchType = "雙擊";
currentPt = point;
updateMapState();
}
@Override
public void onMapLongClick(GeoPoint point) {
touchType = "長按";
currentPt = point;
updateMapState();
}
};
mMapView.regMapTouchListner(mapTouchListener);
/**
* 設置地圖事件監聽
*/
mMapListener = new MKMapViewListener() {
@Override
public void onMapMoveFinish() {
/**
* 在此處理地圖移動完成回調 縮放，平移等操作完成后，此回調被觸發
*/
updateMapState();
}
@Override
public void onClickMapPoi(MapPoi mapPoiInfo) {
/**
* 在此處理底圖poi點擊事件 顯示底圖poi名稱并移動至該點 設置過：
* mMapController.enableClick(true); 時，此回調才能被觸發
*
*/
}
@Override
public void onGetCurrentMap(Bitmap b) {
/**
* 當調用過 mMapView.getCurrentMap()后，此回調會被觸發 可在此保存截圖至存儲設備
*
*/
if (!Environment.MEDIA_MOUNTED.equals(Environment
.getExternalStorageState())) {
Toast.makeText(ControlBMapActivity.this, "請插入SD卡",
Toast.LENGTH_SHORT).show();
return;
}
File file = new File(Environment.getExternalStorageDirectory(),
System.currentTimeMillis() + ".png");
FileOutputStream out;
try {
out = new FileOutputStream(file);
if (b.compress(Bitmap.CompressFormat.PNG, 70, out)) {
out.flush();
out.close();
}
Toast.makeText(ControlBMapActivity.this,
"屏幕截圖成功，圖片存在: " + file.toString(),
Toast.LENGTH_SHORT).show();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void onMapAnimationFinish() {
/**
* 地圖完成帶動畫的操作（如: animationTo()）后，此回調被觸發
*/
updateMapState();
}
@Override
public void onMapLoadFinish() {
}
};
mMapView.regMapViewListener(DemoApplication.getInstance().mBMapManager,
mMapListener);
/**
* 設置按鍵監聽
*/
zoomButton = (Button) findViewById(R.id.zoombutton);
rotateButton = (Button) findViewById(R.id.rotatebutton);
overlookButton = (Button) findViewById(R.id.overlookbutton);
saveScreenButton = (Button) findViewById(R.id.savescreen);
OnClickListener onClickListener = new OnClickListener() {
@Override
public void onClick(View view) {
if (view.equals(zoomButton)) {
perfomZoom();
} else if (view.equals(rotateButton)) {
perfomRotate();
} else if (view.equals(overlookButton)) {
perfomOverlook();
} else if (view.equals(saveScreenButton)) {
// 截圖，在MKMapViewListener中保存圖片
mMapView.getCurrentMap();
Toast.makeText(ControlBMapActivity.this, "正在截取屏幕圖片...",
Toast.LENGTH_SHORT).show();
}
updateMapState();
}
};
zoomButton.setOnClickListener(onClickListener);
rotateButton.setOnClickListener(onClickListener);
overlookButton.setOnClickListener(onClickListener);
saveScreenButton.setOnClickListener(onClickListener);
}
/**
* 處理縮放，sdk縮放級別范圍：[3.0,19.0],小于3.0將按3.0處理；大于19.0將按19.0處理
*/
private void perfomZoom() {
EditText t = (EditText) findViewById(R.id.zoomlevel);
try {
float zoomLevel = Float.parseFloat(t.getText().toString());
mMapController.setZoom(zoomLevel);
} catch (NumberFormatException e) {
Toast.makeText(this, "請輸入正確的縮放級別,范圍： [3.0,19.0],只能輸入浮點型或整型",
Toast.LENGTH_SHORT).show();
}
}
/**
* 處理旋轉 ，旋轉角單位：度 ，逆時針旋轉
*/
private void perfomRotate() {
EditText t = (EditText) findViewById(R.id.rotateangle);
try {
int rotateAngle = Integer.parseInt(t.getText().toString());
mMapController.setRotation(rotateAngle);
} catch (NumberFormatException e) {
Toast.makeText(this, "請輸入正確的旋轉角度,只能為整型", Toast.LENGTH_SHORT).show();
}
}
/**
* 處理俯視 俯角范圍： -45 ~ 0 , 單位： 度
*/
private void perfomOverlook() {
EditText t = (EditText) findViewById(R.id.overlookangle);
try {
int overlookAngle = Integer.parseInt(t.getText().toString());
mMapController.setOverlooking(overlookAngle);
} catch (NumberFormatException e) {
Toast.makeText(this, "請輸入正確的俯角,范圍： -45 ~ 0", Toast.LENGTH_SHORT)
.show();
}
}
/**
* 更新地圖狀態顯示面板
*/
private void updateMapState() {
if (mStateTextView == null) {
return;
}
String state = "";
if (currentPt == null) {
state = "點擊、長按、雙擊地圖以獲取經緯度和地圖狀態";
} else {
state = String.format(touchType + ",當前經度 ： %f 當前緯度：%f",
currentPt.getLongitudeE6() * 1E-6,
currentPt.getLatitudeE6() * 1E-6);
}
state += "\n";
state += String
.format("zoom level= %.1f rotate angle= %d overlaylook angle= %d",
mMapView.getZoomLevel(), mMapView.getMapRotation(),
mMapView.getMapOverlooking());
mStateTextView.setText(state);
}
@Override
protected void onPause() {
/**
* MapView的生命周期與Activity同步，當activity掛起時需調用MapView.onPause()
*/
mMapView.onPause();
super.onPause();
}
@Override
protected void onResume() {
/**
* MapView的生命周期與Activity同步，當activity恢復時需調用MapView.onResume()
*/
mMapView.onResume();
super.onResume();
}
@Override
protected void onDestroy() {
/**
* MapView的生命周期與Activity同步，當activity銷毀時需調用MapView.destroy()
*/
mMapView.destroy();
super.onDestroy();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mMapView.onSaveInstanceState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
mMapView.onRestoreInstanceState(savedInstanceState);
}
} 布局XML：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:id="@+id/layout_bottom"
android:layout_width="match_parent"
android:layout_height="50dip"
android:layout_alignParentBottom="true"
android:orientation="horizontal" >
<Button
android:id="@+id/zoombutton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="縮放" />
<EditText
android:id="@+id/zoomlevel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="10" />
<Button
android:id="@+id/rotatebutton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="旋轉" />
<EditText
android:id="@+id/rotateangle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:numeric="integer"
android:text="90" />
<Button
android:id="@+id/overlookbutton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="俯視" />
<EditText
android:id="@+id/overlookangle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="-30" />
</LinearLayout>
<TextView
android:id="@+id/state"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@id/layout_bottom"
android:text="點擊、長按、雙擊地圖以獲取經緯度和地圖狀態" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@id/state"
android:orientation="vertical" >
<com.baidu.mapapi.map.MapView
android:id="@+id/bmapView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true" />
<Button
android:id="@+id/savescreen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginTop="10dip"
android:text="截圖" />
</RelativeLayout>
</RelativeLayout> Application類及Manifest同上文。
附上圖片效果：
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