Java Android将2d int数组从一个活动传递到另一个错误
活动1:Java Android将2d int数组从一个活动传递到另一个错误,java,android,arrays,2d,Java,Android,Arrays,2d,活动1: Bundle bundle = new Bundle(); bundle.putSerializable("CustomLevelData", LevelCreator.LCLevelData); Intent i = new Intent(LevelCreatorPopout.this, GameView.class); i.putExtras(bundle); startActivity(i); 活动2: LevelData=(int[][]) extras.getSerial
Bundle bundle = new Bundle();
bundle.putSerializable("CustomLevelData", LevelCreator.LCLevelData);
Intent i = new Intent(LevelCreatorPopout.this, GameView.class);
i.putExtras(bundle);
startActivity(i);
活动2:
LevelData=(int[][]) extras.getSerializable("CustomLevelData");
错误:
E/AndroidRuntime(16220):致命异常:main
E/AndroidRuntime(16220):java.lang.RuntimeException:无法启动活动组件信息{com.powerpoint45.maze/com.powerpoint45.maze.GameView}:java.lang.ClassCastException:java.lang.Object[]无法转换为int[][]
我已经搜索了2d INT数组,但没有找到传递的任何内容。与其使用Serializable,不如从性能角度使用它来传递非原始数据 不确定这是否是最好的主意,但您可以定义一个包含2d数组并实现Parcelable的类。然后,您可以使用以下命令从活动传递该类的实例:
Intent intent = this.getIntent();
// Assume MyClass is the class which contains the 2d-array
intent.putExtra("key", myclassObj); //value being the instance/object of MyClass that you want to pass
Intent intent = this.getIntent();
Bundle bundle = intent.getExtras();
MyClass mc = (MyClass)bundle.getParcelable("key");
您可以使用以下命令在另一个活动中检索它:
Intent intent = this.getIntent();
// Assume MyClass is the class which contains the 2d-array
intent.putExtra("key", myclassObj); //value being the instance/object of MyClass that you want to pass
Intent intent = this.getIntent();
Bundle bundle = intent.getExtras();
MyClass mc = (MyClass)bundle.getParcelable("key");
如果您仍然想继续使用Serializable,那么必须在第二个活动中中断它并执行循环
Bundle dataBundle = getIntent().getExtras();
int[][] levelData = new int[3][3];
Object[] temp = (Object[])dataBundle.getSerializable("CustomLevelData");
if(temp != null){
levelData = new int[temp.length][];
for(int i = 0; i < temp.length; i++){
levelData[i] = (int[])temp[i];
}
}
Bundle-dataBundle=getIntent().getExtras();
int[][]levelData=新int[3][3];
Object[]temp=(Object[])dataBundle.getSerializable(“CustomLevelData”);
如果(温度!=null){
levelData=新整数[温度长度][];
对于(int i=0;i
我做了什么:
上课
package com.powerpoint45.maze;
导入android.os.packet;
导入android.os.Parcelable
公共类SerializableCustomData实现Parcelable{
public int[][] ints;
public int[][] getints() {
return ints;
}
public void setints(int[][] ints) {
this.ints = ints;
}
public SerializableCustomData() {
ints = new int[1][1];
}
public SerializableCustomData(Parcel in) {
ints = (int[][]) in.readSerializable();
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeSerializable(ints);
}
public static final Parcelable.Creator<SerializableCustomData> CREATOR = new Parcelable.Creator<SerializableCustomData>() {
@Override
public SerializableCustomData createFromParcel(Parcel in) {
return new SerializableCustomData(in);
}
@Override
public SerializableCustomData[] newArray(int size) {
return new SerializableCustomData[size];
}
};
抓住它
SerializableCustomData myParcelable = extras.getParcelable("parcel");
LevelData = myParcelable.getints();