Android 通过活动中的意图传递不同的数据
示例
1.传递整数数据：
发件人活动
Intent myIntent = new Intent(SenderActivity.this, ReceiverActivity.class);
myIntent.putExtra("intVariableName", intValue);
startActivity(myIntent);接收者活动
Intent mIntent = getIntent();
int intValue = mIntent.getIntExtra("intVariableName", 0); //如果找不到intVariableName的值，则将0设置为默认值2.传递双重数据：
发件人活动
Intent myIntent = new Intent(SenderActivity.this, ReceiverActivity.class);
myIntent.putExtra("doubleVariableName", doubleValue);
startActivity(myIntent);接收者活动
Intent mIntent = getIntent();
double doubleValue = mIntent.getDoubleExtra("doubleVariableName", 0.00); //如果找不到doubleVariableName的值，则将0.00设置为默认值3.传递字符串数据：
发件人活动
Intent myIntent = new Intent(SenderActivity.this, ReceiverActivity.class);
myIntent.putExtra("stringVariableName", stringValue);
startActivity(myIntent);接收者活动
Intent mIntent = getIntent();
String stringValue = mIntent.getExtras().getString("stringVariableName");要么
Intent mIntent = getIntent();
String stringValue = mIntent.getStringExtra("stringVariableName");4.传递ArrayList数据：
发件人活动
Intent myIntent = new Intent(SenderActivity.this, ReceiverActivity.class);
myIntent.putStringArrayListExtra("arrayListVariableName", arrayList);
startActivity(myIntent);接收者活动
Intent mIntent = getIntent();
arrayList = mIntent.getStringArrayListExtra("arrayListVariableName");5.传递对象数据：
发件人活动
Intent myIntent = new Intent(SenderActivity.this, ReceiverActivity.class);
myIntent.putExtra("ObjectVariableName", yourObject);
startActivity(myIntent);接收者活动
Intent mIntent = getIntent();
yourObj = mIntent.getSerializableExtra("ObjectVariableName");注意：请记住，自定义类必须实现该Serializable接口。
6.传递HashMap<String，String>数据：
发件人活动
HashMap<String，String>hashMap;
Intent mIntent = new Intent(SenderActivity.this, ReceiverActivity.class);
mIntent.putExtra("hashMap", hashMap);
startActivity(mIntent);接收者活动
Intent mIntent = getIntent();
HashMap<String, String> hashMap = (HashMap<String, String>)
mIntent.getSerializableExtra("hashMap");7.传递位图数据：
发件人活动
Intent myIntent = new Intent(SenderActivity.this, ReceiverActivity.class);
myIntent.putExtra("image",bitmap);
startActivity(mIntent);接收者活动
Intent mIntent = getIntent();
Bitmap bitmap = mIntent.getParcelableExtra("image");