我想在不使用首选项的情况下传递一个对象数组 我用Intent !!!
Object类Bts
public class Bts implements Serializable {
int idbts;
String nombts;
String ipaddress;
String logb;
String pawb;
int xbts;
int ybts;
public Bts(int idbts, String nombts, String ipaddress, String logb,
String pawb, int xbts, int ybts) {
super();
this.idbts = idbts;
this.nombts = nombts;
this.ipaddress = ipaddress;
this.logb = logb;
this.pawb = pawb;
this.xbts = xbts;
this.ybts = ybts;
}
//wthis setter and getter
}
源活动 Ps：JSONParseBts填充了listeBts。
public class ApresConnextionActivity extends Activity {
public Bts[] listeBts;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.apresconnect);
final Button btsButton = (Button) findViewById(R.id.btbts);
//boutonbts
btsButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Log.w("myApp",""+listeBts.length);
Intent i = new Intent(ApresConnextionActivity.this, BtsBoutonActivity.class);
i.putExtra("tabbts",listeBts);
startActivity(i);
}
});
new JSONParseBts().execute();
}
public class JSONParseBts extends AsyncTask<String, String, JSONObject> { ... }
}
and distination活动：
public class BtsBoutonActivity extends Activity {
cellule[] listecellule;
Bts[] listeBts;
int i,xx=0;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.btsbouton);
Bundle b = getIntent().getExtras();
if (b != null)
{
Bts[] listeBts = (Bts[])b.getSerializable("tabbts") ;
Log.w("myApp",""+listeBts.length);
}else{
Log.w("myApp","you have problem");
}
/* Intent intent = getIntent();
listeBts = (Bts[])intent.getSerializableExtra("tabbts");*/
final Button[] b = new Button[listeBts.length];
LinearLayout ll3 = (LinearLayout)findViewById(R.id.linearLayout2); // Btn
for(i = 0; i < listeBts.length; i++){
//Log.w("myApp",listeBts[i].toString());
b[i] = new Button(BtsBoutonActivity.this);
b[i].setText(listeBts[i].getNombts());
xx =listeBts[i].getIdbts();
Log.w("myApp",""+xx);
b[i].setId(xx);
ll3.addView(b[i]);
final Button btbts = (Button) findViewById(xx);
btbts.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Toast saved_message=Toast.makeText(BtsBoutonActivity.this,btbts.getText()+" "+btbts.getId(),1);
saved_message.show();
}});
}
}
}
错误是：
05-10 16:29:25.096: E/AndroidRuntime(819): java.lang.RuntimeException: Unable to start activity ComponentInfo{pfe.essat.com/pfe.essat.com.BtsBoutonActivity}: java.lang.ClassCastException: java.lang.Object[] cannot be cast to pfe.essat.objet.com.Bts[]
答案 0 :(得分：1)
你可以使用一个包含Serializable数组的包装器类，我刚测试了它并且它可以工作。
首先，创建简单的包装类：
import java.io.Serializable;
public class BtsWrapper implements Serializable{
Bts[] array;
public BtsWrapper(Bts[] a){
array = a;
}
}
然后在Intent：
中传递Serializable包装类btsButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Log.w("myApp",""+listeBts.length);
Intent i = new Intent(ApresConnextionActivity.this, BtsBoutonActivity.class);
BtsWrapper bWrapper = new BtsWrapper(listeBts); //added
i.putExtra("tabbts",bWrapper); //modified
startActivity(i);
}
});
然后，从附加组件中获取Serializable包装器，然后只提取数组：
Bundle b = getIntent().getExtras();
if (b != null)
{
//Bts[] listeBts = (Bts[])b.getSerializable("tabbts") ;
BtsWrapper bWrapper = (BtsWrapper) b.getSerializable("tabbts"); //added
Bts[] listeBts = bWrapper.array; //added
Log.w("myApp",""+listeBts.length);
}else{
Log.w("myApp","you have problem");
}
答案 1 :(得分：0)
我相信没有这样的putExtra API可以接受一些Serializable对象的Array。请参阅http://developer.android.com/reference/android/content/Intent.html#putCharSequenceArrayListExtra(java.lang.String，java.util.ArrayList）。还没有可用于从Intent中提取某些Serializable对象的数组的getter。
你可以让你的Bts类Parcelable并使用公共Intent putExtra（String name，Parcelable [] value）代替。
答案 2 :(得分：0)
创建Constants.java
public class Constants {
public static String BTS_EXTRA_KEY = "bts_extra";
}
将您的Bts类修改为此类
import android.os.Parcel;
import android.os.Parcelable;
public class Bts implements Parcelable {
private String nombts;
private String ipaddress;
private String logb;
private String pawb;
private int idbts;
private int xbts;
private int ybts;
public Bts(Parcel in) {
// Construct from parcel
String[] data = new String[4];
int[] dataInt = new int[3];
in.readStringArray(data);
in.readIntArray(dataInt);
nombts = data[0];
ipaddress = data[1];
logb = data[2];
pawb = data[3];
idbts = dataInt[0];
xbts = dataInt[0];
ybts = dataInt[0];
}
public Bts(int idbts, String nombts, String ipaddress, String logb, String pawb, int xbts, int ybts) {
super();
this.idbts = idbts;
this.nombts = nombts;
this.ipaddress = ipaddress;
this.logb = logb;
this.pawb = pawb;
this.xbts = xbts;
this.ybts = ybts;
}
public String getNombts() {
return nombts;
}
public void setNombts(String nombts) {
this.nombts = nombts;
}
public String getIpaddress() {
return ipaddress;
}
public void setIpaddress(String ipaddress) {
this.ipaddress = ipaddress;
}
public String getLogb() {
return logb;
}
public void setLogb(String logb) {
this.logb = logb;
}
public String getPawb() {
return pawb;
}
public void setPawb(String pawb) {
this.pawb = pawb;
}
public int getIdbts() {
return idbts;
}
public void setIdbts(int idbts) {
this.idbts = idbts;
}
public int getXbts() {
return xbts;
}
public void setXbts(int xbts) {
this.xbts = xbts;
}
public int getYbts() {
return ybts;
}
public void setYbts(int ybts) {
this.ybts = ybts;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel parcel, int i) {
parcel.writeStringArray(new String[]{nombts, ipaddress, logb, pawb});
parcel.writeIntArray(new int[]{idbts, xbts, ybts});
}
public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
public Bts createFromParcel(Parcel in) {
return new Bts(in);
}
public Bts[] newArray(int size) {
return new Bts[size];
}
};
}
现在要将此数据传递给另一个活动，您必须拥有ArrayList
中的数据public void onBtnClick(View v){
Intent i = new Intent(MainActivity.this, SecondActivity.class);
ArrayList<Bts> listOfBts = new ArrayList<Bts>();
listOfBts.add(new Bts(123, "323", "23423", "3423", "frlaldf", 45, 324));
listOfBts.add(new Bts(124, "323", "23423", "3423", "frlaldf", 45, 324));
listOfBts.add(new Bts(125, "323", "23423", "3423", "frlaldf", 45, 324));
listOfBts.add(new Bts(126, "323", "23423", "3423", "frlaldf", 45, 324));
listOfBts.add(new Bts(127, "323", "23423", "3423", "frlaldf", 45, 324));
listOfBts.add(new Bts(128, "323", "23423", "3423", "frlaldf", 45, 324));
i.putParcelableArrayListExtra(Constants.BTS_EXTRA_KEY, listOfBts);
startActivity(i);
}
在其他活动中
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
printBts();
}
private void printBts(){
Bundle extras = getIntent().getExtras();
ArrayList<Bts> btsList = extras.getParcelableArrayList(Constants.BTS_EXTRA_KEY);
for(Bts b : btsList){
Log.d("SecondActivity", "" + b.getIdbts());
}
}
结果：
05-10 21:14:51.414 19703-19703/si.kseneman.btstest D/SecondActivity﹕ 123
05-10 21:14:51.414 19703-19703/si.kseneman.btstest D/SecondActivity﹕ 124
05-10 21:14:51.414 19703-19703/si.kseneman.btstest D/SecondActivity﹕ 125
05-10 21:14:51.414 19703-19703/si.kseneman.btstest D/SecondActivity﹕ 126
05-10 21:14:51.414 19703-19703/si.kseneman.btstest D/SecondActivity﹕ 127
05-10 21:14:51.414 19703-19703/si.kseneman.btstest D/SecondActivity﹕ 128