activity安卓作業 3月5號

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public class MainActivity extends AppCompatActivity {private EditText editText;private TextView textView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);    editText =(EditText)findViewById(R.id.xm);    textView= (TextView) findViewById(R.id.jl);    findViewById(R.id.pg).setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View view) {            Intent intent=new Intent(MainActivity.this,Main2Activity.class);            intent.putExtra("date",editText.getText().toString()+"同學你有信心嗎？");            startActivityForResult(intent,0);        }    });    findViewById(R.id.exit).setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View view) {            finish();        }    });}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {    super.onActivityResult(requestCode, resultCode, data);    textView.setText(data.getStringExtra("date"));}}第二個java代碼public class Main2Activity extends AppCompatActivity {private TextView jl;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main2);    jl= (TextView) findViewById(R.id.jl);    Intent intent=getIntent();    jl.setText(intent.getStringExtra("date"));}public void onClick(View view){    switch (view.getId()){        case R.id.yes:            back("有");            break;        case R.id.no:            back("沒有");            break;    }}public void back(String content){    Intent intent=new Intent();    intent.putExtra("date",content);    setResult(1,intent);    finish();}}

 

<LinearLayout        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1"        android:orientation="horizontal">        <Button            android:id="@+id/pg"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="@string/pg" />        <Button            android:id="@+id/exit"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="@string/exit" />    </LinearLayout></LinearLayout> <TextView        android:id="@+id/jl"        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1"        android:gravity="bottom"        android:text="@string/jl"        android:textColor="@color/colorPrimaryDark" />    <LinearLayout        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1"        android:orientation="horizontal">        <Button            android:id="@+id/yes"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="@string/yes" />        <Button            android:id="@+id/no"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="@string/no" />    </LinearLayout></LinearLayout>

　　

activity安卓作業 3月5號